1LVCREATE(8) System Manager's Manual LVCREATE(8)
2
6 lvcreate — Create a logical volume
7
9 lvcreate option_args position_args
10 [ option_args ]
11 [ position_args ]
12 -a|--activate y|n|ay
14 --addtag Tag
15 --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
16 -A|--autobackup y|n
17 -H|--cache
18 --cachedevice PV
19 --cachemetadataformat auto|1|2
20 --cachemode writethrough|writeback|passthrough
21 --cachepolicy String
22 --cachepool LV
23 --cachesettings String
24 --cachesize Size[m|UNIT]
25 --cachevol LV
26 -c|--chunksize Size[k|UNIT]
27 --commandprofile String
28 --compression y|n
29 --config String
30 -C|--contiguous y|n
31 -d|--debug
32 --deduplication y|n
33 --devices PV
34 --devicesfile String
35 --discards passdown|nopassdown|ignore
36 --driverloaded y|n
37 --errorwhenfull y|n
38 -l|--extents Number[PERCENT]
39 -h|--help
40 -K|--ignoreactivationskip
41 --ignoremonitoring
42 --journal String
43 --lockopt String
44 --longhelp
45 -j|--major Number
46 --[raid]maxrecoveryrate Size[k|UNIT]
47 --metadataprofile String
48 --minor Number
49 --[raid]minrecoveryrate Size[k|UNIT]
50 --mirrorlog core|disk
51 -m|--mirrors Number
52 --monitor y|n
53 -n|--name String
54 --nohints
55 --nolocking
56 --nosync
57 --noudevsync
58 -p|--permission rw|r
59 -M|--persistent y|n
60 --poolmetadatasize Size[m|UNIT]
61 --poolmetadataspare y|n
62 --profile String
63 -q|--quiet
64 --raidintegrity y|n
65 --raidintegrityblocksize Number
66 --raidintegritymode String
67 -r|--readahead auto|none|Number
68 -R|--regionsize Size[m|UNIT]
69 --reportformat basic|json|json_std
70 -k|--setactivationskip y|n
71 --setautoactivation y|n
72 -L|--size Size[m|UNIT]
73 -s|--snapshot
74 -i|--stripes Number
75 -I|--stripesize Size[k|UNIT]
76 -t|--test
77 -T|--thin
78 --thinpool LV
79 --type linear|striped|snapshot|raid|mirror|thin|thin-pool|vdo|
80 vdo-pool|cache|cache-pool|writecache
81 --vdo
82 --vdopool LV
83 --vdosettings String
84 -v|--verbose
85 --version
86 -V|--virtualsize Size[m|UNIT]
87 -W|--wipesignatures y|n
88 -y|--yes
89 -Z|--zero y|n
90
92 lvcreate creates a new LV in a VG. For standard LVs, this requires al‐
93 locating logical extents from the VG's free physical extents. If there
94 is not enough free space, the VG can be extended with other PVs (vgex‐
95 tend(8)), or existing LVs can be reduced or removed (lvremove(8), lvre‐
96 duce(8)).
97 To control which PVs a new LV will use, specify one or more PVs as po‐
99 sition args at the end of the command line. lvcreate will allocate
100 physical extents only from the specified PVs.
101 lvcreate can also create snapshots of existing LVs, e.g. for backup
103 purposes. The data in a new snapshot LV represents the content of the
104 original LV from the time the snapshot was created.
105 RAID LVs can be created by specifying an LV type when creating the LV
107 (see lvmraid(7)). Different RAID levels require different numbers of
108 unique PVs be available in the VG for allocation.
109 Thin pools (for thin provisioning) and cache pools (for caching) are
111 represented by special LVs with types thin-pool and cache-pool (see
112 lvmthin(7) and lvmcache(7)). The pool LVs are not usable as standard
113 block devices, but the LV names act as references to the pools.
114 Thin LVs are thinly provisioned from a thin pool, and are created with
116 a virtual size rather than a physical size. A cache LV is the combina‐
117 tion of a standard LV with a cache pool, used to cache active portions
118 of the LV to improve performance.
119 VDO LVs are also provisioned volumes from a VDO pool, and are created
121 with a virtual size rather than a physical size (see lvmvdo(7)).
122 Usage notes
124 In the usage section below, --size Size can be replaced with --extents
125 Number. See descriptions in the options section.
126 In the usage section below, --name is omitted from the required op‐
128 tions, even though it is typically used. When the name is not speci‐
129 fied, a new LV name is generated with the "lvol" prefix and a unique
130 numeric suffix.
131 In the usage section below, when creating a pool and the name is omit‐
133 ted the new LV pool name is generated with the "vpool" for vdo-pools
134 for prefix and a unique numeric suffix.
135 Pool name can be specified together with VG name i.e.: vg00/mythinpool.
137
139 Create a linear LV.
140 lvcreate -L|--size Size[m|UNIT] VG
142 [ --type linear ] (implied)
143 [ -l|--extents Number[PERCENT] ]
144 [ COMMON_OPTIONS ]
145 [ PV ... ]
146 —
148 Create a striped LV.
150 lvcreate -i|--stripes Number -L|--size Size[m|UNIT] VG
152 [ --type striped ] (implied)
153 [ -l|--extents Number[PERCENT] ]
154 [ -I|--stripesize Size[k|UNIT] ]
155 [ COMMON_OPTIONS ]
156 [ PV ... ]
157 —
159 Create a raid1 or mirror LV.
161 lvcreate -m|--mirrors Number -L|--size Size[m|UNIT] VG
163 [ --type raid1|mirror ] (implied)
164 [ -l|--extents Number[PERCENT] ]
165 [ -I|--stripesize Size[k|UNIT] ]
166 [ -R|--regionsize Size[m|UNIT] ]
167 [ --mirrorlog core|disk ]
168 [ --[raid]minrecoveryrate Size[k|UNIT] ]
169 [ --[raid]maxrecoveryrate Size[k|UNIT] ]
170 [ COMMON_OPTIONS ]
171 [ PV ... ]
172 —
174 Create a raid LV (a specific raid level must be used, e.g. raid1).
176 lvcreate --type raid -L|--size Size[m|UNIT] VG
178 [ -l|--extents Number[PERCENT] ]
179 [ -i|--stripes Number ]
180 [ -I|--stripesize Size[k|UNIT] ]
181 [ -m|--mirrors Number ]
182 [ -R|--regionsize Size[m|UNIT] ]
183 [ --[raid]minrecoveryrate Size[k|UNIT] ]
184 [ --[raid]maxrecoveryrate Size[k|UNIT] ]
185 [ --raidintegrity y|n ]
186 [ --raidintegritymode String ]
187 [ --raidintegrityblocksize Number ]
188 [ COMMON_OPTIONS ]
189 [ PV ... ]
190 —
192 Create a raid10 LV.
194 lvcreate -m|--mirrors Number -i|--stripes Number
196 -L|--size Size[m|UNIT] VG
197 [ --type raid10 ] (implied)
198 [ -l|--extents Number[PERCENT] ]
199 [ -I|--stripesize Size[k|UNIT] ]
200 [ -R|--regionsize Size[m|UNIT] ]
201 [ --[raid]minrecoveryrate Size[k|UNIT] ]
202 [ --[raid]maxrecoveryrate Size[k|UNIT] ]
203 [ COMMON_OPTIONS ]
204 [ PV ... ]
205 —
207 Create a COW snapshot LV of an origin LV.
209 lvcreate -s|--snapshot -L|--size Size[m|UNIT] LV
211 [ --type snapshot ] (implied)
212 [ -l|--extents Number[PERCENT] ]
213 [ -i|--stripes Number ]
214 [ -I|--stripesize Size[k|UNIT] ]
215 [ -c|--chunksize Size[k|UNIT] ]
216 [ COMMON_OPTIONS ]
217 [ PV ... ]
218 —
220 Create a thin pool.
222 lvcreate --type thin-pool -L|--size Size[m|UNIT] VG
224 [ -l|--extents Number[PERCENT] ]
225 [ -i|--stripes Number ]
226 [ -I|--stripesize Size[k|UNIT] ]
227 [ -T|--thin ]
228 [ -c|--chunksize Size[k|UNIT] ]
229 [ --thinpool LV_new ]
230 [ --discards passdown|nopassdown|ignore ]
231 [ --errorwhenfull y|n ]
232 [ --poolmetadatasize Size[m|UNIT] ]
233 [ --poolmetadataspare y|n ]
234 [ COMMON_OPTIONS ]
235 [ PV ... ]
236 —
238 Create a cache pool.
240 lvcreate --type cache-pool -L|--size Size[m|UNIT] VG
242 [ -l|--extents Number[PERCENT] ]
243 [ -i|--stripes Number ]
244 [ -I|--stripesize Size[k|UNIT] ]
245 [ -H|--cache ]
246 [ -c|--chunksize Size[k|UNIT] ]
247 [ --cachemode writethrough|writeback|passthrough ]
248 [ --cachepolicy String ]
249 [ --cachesettings String ]
250 [ --cachemetadataformat auto|1|2 ]
251 [ --poolmetadatasize Size[m|UNIT] ]
252 [ --poolmetadataspare y|n ]
253 [ COMMON_OPTIONS ]
254 [ PV ... ]
255 —
257 Create a thin LV in a thin pool.
259 lvcreate -V|--virtualsize Size[m|UNIT] --thinpool LV VG
261 [ --type thin ] (implied)
262 [ -T|--thin ]
263 [ COMMON_OPTIONS ]
264 —
266 Create a thin LV that is a snapshot of an existing thin LV.
268 lvcreate -s|--snapshot LV1
270 [ --type thin ] (implied)
271 [ -T|--thin ]
272 [ COMMON_OPTIONS ]
273 LV1 types: thin
275 —
277 Create a thin LV that is a snapshot of an external origin LV.
279 lvcreate --type thin --thinpool LV LV
281 [ -T|--thin ]
282 [ COMMON_OPTIONS ]
283 —
285 Create a LV that returns VDO when used.
287 lvcreate --type vdo -L|--size Size[m|UNIT] VG
289 [ -l|--extents Number[PERCENT] ]
290 [ -i|--stripes Number ]
291 [ -I|--stripesize Size[k|UNIT] ]
292 [ -V|--virtualsize Size[m|UNIT] ]
293 [ --vdo ]
294 [ --vdopool LV_new ]
295 [ --compression y|n ]
296 [ --deduplication y|n ]
297 [ --vdosettings String ]
298 [ COMMON_OPTIONS ]
299 [ PV ... ]
300 —
302 Create a new LV, then attach the specified cachepool
304 which converts the new LV to type cache.
305 lvcreate --type cache -L|--size Size[m|UNIT]
307 --cachepool LV VG
308 [ -l|--extents Number[PERCENT] ]
309 [ -i|--stripes Number ]
310 [ -I|--stripesize Size[k|UNIT] ]
311 [ -H|--cache ]
312 [ -c|--chunksize Size[k|UNIT] ]
313 [ --cachemode writethrough|writeback|passthrough ]
314 [ --cachepolicy String ]
315 [ --cachesettings String ]
316 [ --cachemetadataformat auto|1|2 ]
317 [ --poolmetadatasize Size[m|UNIT] ]
318 [ --poolmetadataspare y|n ]
319 [ COMMON_OPTIONS ]
320 [ PV ... ]
321 —
323 Create a new LV, then attach the specified cachevol
325 which converts the new LV to type cache.
326 lvcreate --type cache -L|--size Size[m|UNIT]
328 --cachevol LV VG
329 [ -l|--extents Number[PERCENT] ]
330 [ -i|--stripes Number ]
331 [ -I|--stripesize Size[k|UNIT] ]
332 [ -c|--chunksize Size[k|UNIT] ]
333 [ --cachemode writethrough|writeback|passthrough ]
334 [ --cachepolicy String ]
335 [ --cachesettings String ]
336 [ --cachemetadataformat auto|1|2 ]
337 [ COMMON_OPTIONS ]
338 [ PV ... ]
339 —
341 Create a new LV, then attach a cachevol created from
343 the specified cache device, which converts the
344 new LV to type cache.
345 lvcreate --type cache -L|--size Size[m|UNIT]
347 --cachedevice PV VG
348 [ -l|--extents Number[PERCENT] ]
349 [ -i|--stripes Number ]
350 [ -I|--stripesize Size[k|UNIT] ]
351 [ -c|--chunksize Size[k|UNIT] ]
352 [ --cachesize Size[m|UNIT] ]
353 [ --cachemode writethrough|writeback|passthrough ]
354 [ --cachepolicy String ]
355 [ --cachesettings String ]
356 [ --cachemetadataformat auto|1|2 ]
357 [ COMMON_OPTIONS ]
358 [ PV ... ]
359 —
361 Create a new LV, then attach the specified cachevol
363 which converts the new LV to type writecache.
364 lvcreate --type writecache -L|--size Size[m|UNIT]
366 --cachevol LV VG
367 [ -l|--extents Number[PERCENT] ]
368 [ -i|--stripes Number ]
369 [ -I|--stripesize Size[k|UNIT] ]
370 [ --cachesettings String ]
371 [ COMMON_OPTIONS ]
372 [ PV ... ]
373 —
375 Create a new LV, then attach a cachevol created from
377 the specified cache device, which converts the
378 new LV to type writecache.
379 lvcreate --type writecache -L|--size Size[m|UNIT]
381 --cachedevice PV VG
382 [ -l|--extents Number[PERCENT] ]
383 [ -i|--stripes Number ]
384 [ -I|--stripesize Size[k|UNIT] ]
385 [ --cachesize Size[m|UNIT] ]
386 [ --cachesettings String ]
387 [ COMMON_OPTIONS ]
388 [ PV ... ]
389 —
391 Common options for command:
393 [ -a|--activate y|n|ay ]
394 [ -A|--autobackup y|n ]
395 [ -C|--contiguous y|n ]
396 [ -K|--ignoreactivationskip ]
397 [ -j|--major Number ]
398 [ -n|--name String ]
399 [ -p|--permission rw|r ]
400 [ -M|--persistent y|n ]
401 [ -r|--readahead auto|none|Number ]
402 [ -k|--setactivationskip y|n ]
403 [ -W|--wipesignatures y|n ]
404 [ -Z|--zero y|n ]
405 [ --addtag Tag ]
406 [ --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
407 ]
408 [ --ignoremonitoring ]
409 [ --metadataprofile String ]
410 [ --minor Number ]
411 [ --monitor y|n ]
412 [ --nosync ]
413 [ --noudevsync ]
414 [ --reportformat basic|json|json_std ]
415 [ --setautoactivation y|n ]
416 Common options for lvm:
418 [ -d|--debug ]
419 [ -h|--help ]
420 [ -q|--quiet ]
421 [ -t|--test ]
422 [ -v|--verbose ]
423 [ -y|--yes ]
424 [ --commandprofile String ]
425 [ --config String ]
426 [ --devices PV ]
427 [ --devicesfile String ]
428 [ --driverloaded y|n ]
429 [ --journal String ]
430 [ --lockopt String ]
431 [ --longhelp ]
432 [ --nohints ]
433 [ --nolocking ]
434 [ --profile String ]
435 [ --version ]
436
438 -a|--activate y|n|ay
439 Controls the active state of the new LV. y makes the LV active,
440 or available. New LVs are made active by default. n makes the
441 LV inactive, or unavailable, only when possible. In some cases,
442 creating an LV requires it to be active. For example, COW snap‐
443 shots of an active origin LV can only be created in the active
444 state (this does not apply to thin snapshots). The --zero op‐
445 tion normally requires the LV to be active. If autoactivation
446 ay is used, the LV is only activated if it matches an item in
447 lvm.conf(5) activation/auto_activation_volume_list. ay implies
448 --zero n and --wipesignatures n. See lvmlockd(8) for more in‐
449 formation about activation options for shared VGs.
450 --addtag Tag
452 Adds a tag to a PV, VG or LV. This option can be repeated to add
453 multiple tags at once. See lvm(8) for information about tags.
454 --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
456 Determines the allocation policy when a command needs to allo‐
457 cate Physical Extents (PEs) from the VG. Each VG and LV has an
458 allocation policy which can be changed with vgchange/lvchange,
459 or overridden on the command line. normal applies common sense
460 rules such as not placing parallel stripes on the same PV. in‐
461 herit applies the VG policy to an LV. contiguous requires new
462 PEs be placed adjacent to existing PEs. cling places new PEs on
463 the same PV as existing PEs in the same stripe of the LV. If
464 there are sufficient PEs for an allocation, but normal does not
465 use them, anywhere will use them even if it reduces performance,
466 e.g. by placing two stripes on the same PV. Optional positional
467 PV args on the command line can also be used to limit which PVs
468 the command will use for allocation. See lvm(8) for more infor‐
469 mation about allocation.
470 -A|--autobackup y|n
472 Specifies if metadata should be backed up automatically after a
473 change. Enabling this is strongly advised! See vgcfgbackup(8)
474 for more information.
475 -H|--cache
477 Specifies the command is handling a cache LV or cache pool. See
478 --type cache and --type cache-pool. See lvmcache(7) for more
479 information about LVM caching.
480 --cachedevice PV
482 The name of a device to use for a cache.
483 --cachemetadataformat auto|1|2
485 Specifies the cache metadata format used by cache target.
486 --cachemode writethrough|writeback|passthrough
488 Specifies when writes to a cache LV should be considered com‐
489 plete. writeback considers a write complete as soon as it is
490 stored in the cache pool. writethough considers a write com‐
491 plete only when it has been stored in both the cache pool and on
492 the origin LV. While writethrough may be slower for writes, it
493 is more resilient if something should happen to a device associ‐
494 ated with the cache pool LV. With passthrough, all reads are
495 served from the origin LV (all reads miss the cache) and all
496 writes are forwarded to the origin LV; additionally, write hits
497 cause cache block invalidates. See lvmcache(7) for more informa‐
498 tion.
499 --cachepolicy String
501 Specifies the cache policy for a cache LV. See lvmcache(7) for
502 more information.
503 --cachepool LV
505 The name of a cache pool.
506 --cachesettings String
508 Specifies tunable kernel options for dm-cache or dm-writecache
509 LVs. Use the form 'option=value' or 'option1=value option2=val‐
510 ue', or repeat --cachesettings for each option being set. These
511 settings override the default kernel behaviors which are usually
512 adequate. To remove cachesettings and revert to the default ker‐
513 nel behaviors, use --cachesettings 'default' for dm-cache or an
514 empty string --cachesettings '' for dm-writecache. See lvm‐
515 cache(7) for more information.
516 --cachesize Size[m|UNIT]
518 The size of cache to use.
519 --cachevol LV
521 The name of a cache volume.
522 -c|--chunksize Size[k|UNIT]
524 The size of chunks in a snapshot, cache pool or thin pool. For
525 snapshots, the value must be a power of 2 between 4 KiB and
526 512 KiB and the default value is 4. For a cache pool the value
527 must be between 32 KiB and 1 GiB and the default value is 64.
528 For a thin pool the value must be between 64 KiB and 1 GiB and
529 the default value starts with 64 and scales up to fit the pool
530 metadata size within 128 MiB, if the pool metadata size is not
531 specified. The value must be a multiple of 64 KiB. See
532 lvmthin(7) and lvmcache(7) for more information.
533 --commandprofile String
535 The command profile to use for command configuration. See
536 lvm.conf(5) for more information about profiles.
537 --compression y|n
539 Controls whether compression is enabled or disable for VDO vol‐
540 ume. See lvmvdo(7) for more information about VDO usage.
541 --config String
543 Config settings for the command. These override lvm.conf(5) set‐
544 tings. The String arg uses the same format as lvm.conf(5), or
545 may use section/field syntax. See lvm.conf(5) for more informa‐
546 tion about config.
547 -C|--contiguous y|n
549 Sets or resets the contiguous allocation policy for LVs. De‐
550 fault is no contiguous allocation based on a next free princi‐
551 ple. It is only possible to change a non-contiguous allocation
552 policy to contiguous if all of the allocated physical extents in
553 the LV are already contiguous.
554 -d|--debug ...
556 Set debug level. Repeat from 1 to 6 times to increase the detail
557 of messages sent to the log file and/or syslog (if configured).
558 --deduplication y|n
560 Controls whether deduplication is enabled or disable for VDO
561 volume. See lvmvdo(7) for more information about VDO usage.
562 --devices PV
564 Restricts the devices that are visible and accessible to the
565 command. Devices not listed will appear to be missing. This op‐
566 tion can be repeated, or accepts a comma separated list of de‐
567 vices. This overrides the devices file.
568 --devicesfile String
570 A file listing devices that LVM should use. The file must exist
571 in /etc/lvm/devices/ and is managed with the lvmdevices(8) com‐
572 mand. This overrides the lvm.conf(5) devices/devicesfile and
573 devices/use_devicesfile settings.
574 --discards passdown|nopassdown|ignore
576 Specifies how the device-mapper thin pool layer in the kernel
577 should handle discards. ignore causes the thin pool to ignore
578 discards. nopassdown causes the thin pool to process discards
579 itself to allow reuse of unneeded extents in the thin pool.
580 passdown causes the thin pool to process discards itself (like
581 nopassdown) and pass the discards to the underlying device. See
582 lvmthin(7) for more information.
583 --driverloaded y|n
585 If set to no, the command will not attempt to use device-mapper.
586 For testing and debugging.
587 --errorwhenfull y|n
589 Specifies thin pool behavior when data space is exhausted. When
590 yes, device-mapper will immediately return an error when a thin
591 pool is full and an I/O request requires space. When no, de‐
592 vice-mapper will queue these I/O requests for a period of time
593 to allow the thin pool to be extended. Errors are returned if
594 no space is available after the timeout. (Also see dm-thin-pool
595 kernel module option no_space_timeout.) See lvmthin(7) for more
596 information.
597 -l|--extents Number[PERCENT]
599 Specifies the size of the new LV in logical extents. The --size
600 and --extents options are alternate methods of specifying size.
601 The total number of physical extents used will be greater when
602 redundant data is needed for RAID levels. An alternate syntax
603 allows the size to be determined indirectly as a percentage of
604 the size of a related VG, LV, or set of PVs. The suffix %VG de‐
605 notes the total size of the VG, the suffix %FREE the remaining
606 free space in the VG, and the suffix %PVS the free space in the
607 specified PVs. For a snapshot, the size can be expressed as a
608 percentage of the total size of the origin LV with the suffix
609 %ORIGIN (100%ORIGIN provides space for the whole origin). When
610 expressed as a percentage, the size defines an upper limit for
611 the number of logical extents in the new LV. The precise number
612 of logical extents in the new LV is not determined until the
613 command has completed.
614 -h|--help
616 Display help text.
617 -K|--ignoreactivationskip
619 Ignore the "activation skip" LV flag during activation to allow
620 LVs with the flag set to be activated.
621 --ignoremonitoring
623 Do not interact with dmeventd unless --monitor is specified. Do
624 not use this if dmeventd is already monitoring a device.
625 --journal String
627 Record information in the systemd journal. This information is
628 in addition to information enabled by the lvm.conf log/journal
629 setting. command: record information about the command. out‐
630 put: record the default command output. debug: record full com‐
631 mand debugging.
632 --lockopt String
634 Used to pass options for special cases to lvmlockd. See lvm‐
635 lockd(8) for more information.
636 --longhelp
638 Display long help text.
639 -j|--major Number
641 Sets the major number of an LV block device.
642 --[raid]maxrecoveryrate Size[k|UNIT]
644 Sets the maximum recovery rate for a RAID LV. The rate value is
645 an amount of data per second for each device in the array. Set‐
646 ting the rate to 0 means it will be unbounded. See lvmraid(7)
647 for more information.
648 --metadataprofile String
650 The metadata profile to use for command configuration. See
651 lvm.conf(5) for more information about profiles.
652 --minor Number
654 Sets the minor number of an LV block device.
655 --[raid]minrecoveryrate Size[k|UNIT]
657 Sets the minimum recovery rate for a RAID LV. The rate value is
658 an amount of data per second for each device in the array. Set‐
659 ting the rate to 0 means it will be unbounded. See lvmraid(7)
660 for more information.
661 --mirrorlog core|disk
663 Specifies the type of mirror log for LVs with the "mirror" type
664 (does not apply to the "raid1" type.) disk is a persistent log
665 and requires a small amount of storage space, usually on a sepa‐
666 rate device from the data being mirrored. core is not persis‐
667 tent; the log is kept only in memory. In this case, the mirror
668 must be synchronized (by copying LV data from the first device
669 to others) each time the LV is activated, e.g. after reboot.
670 mirrored is a persistent log that is itself mirrored, but should
671 be avoided. Instead, use the raid1 type for log redundancy.
672 -m|--mirrors Number
674 Specifies the number of mirror images in addition to the origi‐
675 nal LV image, e.g. --mirrors 1 means there are two images of the
676 data, the original and one mirror image. Optional positional PV
677 args on the command line can specify the devices the images
678 should be placed on. There are two mirroring implementations:
679 "raid1" and "mirror". These are the names of the corresponding
680 LV types, or "segment types". Use the --type option to specify
681 which to use (raid1 is default, and mirror is legacy) Use
682 lvm.conf(5) global/mirror_segtype_default and global/raid10_seg‐
683 type_default to configure the default types. See the --nosync
684 option for avoiding initial image synchronization. See lvm‐
685 raid(7) for more information.
686 --monitor y|n
688 Start (yes) or stop (no) monitoring an LV with dmeventd.
689 dmeventd monitors kernel events for an LV, and performs automat‐
690 ed maintenance for the LV in response to specific events. See
691 dmeventd(8) for more information.
692 -n|--name String
694 Specifies the name of a new LV. When unspecified, a default
695 name of "lvol#" is generated, where # is a number generated by
696 LVM.
697 --nohints
699 Do not use the hints file to locate devices for PVs. A command
700 may read more devices to find PVs when hints are not used. The
701 command will still perform standard hint file invalidation where
702 appropriate.
703 --nolocking
705 Disable locking. Use with caution, concurrent commands may pro‐
706 duce incorrect results.
707 --nosync
709 Causes the creation of mirror, raid1, raid4, raid5 and raid10 to
710 skip the initial synchronization. In case of mirror, raid1 and
711 raid10, any data written afterwards will be mirrored, but the
712 original contents will not be copied. In case of raid4 and
713 raid5, no parity blocks will be written, though any data written
714 afterwards will cause parity blocks to be stored. This is use‐
715 ful for skipping a potentially long and resource intensive ini‐
716 tial sync of an empty mirror/raid1/raid4/raid5 and raid10 LV.
717 This option is not valid for raid6, because raid6 relies on
718 proper parity (P and Q Syndromes) being created during initial
719 synchronization in order to reconstruct proper user date in case
720 of device failures. raid0 and raid0_meta do not provide any da‐
721 ta copies or parity support and thus do not support initial syn‐
722 chronization.
723 --noudevsync
725 Disables udev synchronization. The process will not wait for no‐
726 tification from udev. It will continue irrespective of any pos‐
727 sible udev processing in the background. Only use this if udev
728 is not running or has rules that ignore the devices LVM creates.
729 -p|--permission rw|r
731 Set access permission to read only r or read and write rw.
732 -M|--persistent y|n
734 When yes, makes the specified minor number persistent.
735 --poolmetadatasize Size[m|UNIT]
737 Specifies the size of the new pool metadata LV.
738 --poolmetadataspare y|n
740 Enable or disable the automatic creation and management of a
741 spare pool metadata LV in the VG. A spare metadata LV is re‐
742 served space that can be used when repairing a pool.
743 --profile String
745 An alias for --commandprofile or --metadataprofile, depending on
746 the command.
747 -q|--quiet ...
749 Suppress output and log messages. Overrides --debug and --ver‐
750 bose. Repeat once to also suppress any prompts with answer
751 'no'.
752 --raidintegrity y|n
754 Enable or disable data integrity checksums for raid images.
755 --raidintegrityblocksize Number
757 The block size to use for dm-integrity on raid images. The in‐
758 tegrity block size should usually match the device logical block
759 size, or the file system block size. It may be less than the
760 file system block size, but not less than the device logical
761 block size. Possible values: 512, 1024, 2048, 4096.
762 --raidintegritymode String
764 Use a journal (default) or bitmap for keeping integrity check‐
765 sums consistent in case of a crash. The bitmap areas are recal‐
766 culated after a crash, so corruption in those areas would not be
767 detected. A journal does not have this problem. The journal
768 mode doubles writes to storage, but can improve performance for
769 scattered writes packed into a single journal write. bitmap
770 mode can in theory achieve full write throughput of the device,
771 but would not benefit from the potential scattered write opti‐
772 mization.
773 -r|--readahead auto|none|Number
775 Sets read ahead sector count of an LV. auto is the default
776 which allows the kernel to choose a suitable value automatical‐
777 ly. none is equivalent to zero.
778 -R|--regionsize Size[m|UNIT]
780 Size of each raid or mirror synchronization region. lvm.conf(5)
781 activation/raid_region_size can be used to configure a default.
782 --reportformat basic|json|json_std
784 Overrides current output format for reports which is defined
785 globally by the report/output_format setting in lvm.conf(5).
786 basic is the original format with columns and rows. If there is
787 more than one report per command, each report is prefixed with
788 the report name for identification. json produces report output
789 in JSON format. json_std produces report output in JSON format
790 which is more compliant with JSON standard. See lvmreport(7)
791 for more information.
792 -k|--setactivationskip y|n
794 Persistently sets (yes) or clears (no) the "activation skip"
795 flag on an LV. An LV with this flag set is not activated unless
796 the --ignoreactivationskip option is used by the activation com‐
797 mand. This flag is set by default on new thin snapshot LVs.
798 The flag is not applied to deactivation. The current value of
799 the flag is indicated in the lvs lv_attr bits.
800 --setautoactivation y|n
802 Set the autoactivation property on a VG or LV. Display the
803 property with vgs or lvs "-o autoactivation". When the autoac‐
804 tivation property is disabled, the VG or LV will not be activat‐
805 ed by a command doing autoactivation (vgchange, lvchange, or
806 pvscan using -aay.) If autoactivation is disabled on a VG, no
807 LVs will be autoactivated in that VG, and the LV autoactivation
808 property has no effect. If autoactivation is enabled on a VG,
809 autoactivation can be disabled for individual LVs.
810 -L|--size Size[m|UNIT]
812 Specifies the size of the new LV. The --size and --extents op‐
813 tions are alternate methods of specifying size. The total num‐
814 ber of physical extents used will be greater when redundant data
815 is needed for RAID levels.
816 -s|--snapshot
818 Create a snapshot. Snapshots provide a "frozen image" of an ori‐
819 gin LV. The snapshot LV can be used, e.g. for backups, while
820 the origin LV continues to be used. This option can create a
821 COW (copy on write) snapshot, or a thin snapshot (in a thin
822 pool.) Thin snapshots are created when the origin is a thin LV
823 and the size option is NOT specified. Thin snapshots share the
824 same blocks in the thin pool, and do not allocate new space from
825 the VG. Thin snapshots are created with the "activation skip"
826 flag, see --setactivationskip. A thin snapshot of a non-thin
827 "external origin" LV is created when a thin pool is specified.
828 Unprovisioned blocks in the thin snapshot LV are read from the
829 external origin LV. The external origin LV must be read-only.
830 See lvmthin(7) for more information about LVM thin provisioning.
831 COW snapshots are created when a size is specified. The size is
832 allocated from space in the VG, and is the amount of space that
833 can be used for saving COW blocks as writes occur to the origin
834 or snapshot. The size chosen should depend upon the amount of
835 writes that are expected; often 20% of the origin LV is enough.
836 If COW space runs low, it can be extended with lvextend (shrink‐
837 ing is also allowed with lvreduce.) A small amount of the COW
838 snapshot LV size is used to track COW block locations, so the
839 full size is not available for COW data blocks. Use lvs to
840 check how much space is used, and see --monitor to to automati‐
841 cally extend the size to avoid running out of space.
842 -i|--stripes Number
844 Specifies the number of stripes in a striped LV. This is the
845 number of PVs (devices) that a striped LV is spread across. Data
846 that appears sequential in the LV is spread across multiple de‐
847 vices in units of the stripe size (see --stripesize). This does
848 not change existing allocated space, but only applies to space
849 being allocated by the command. When creating a RAID 4/5/6 LV,
850 this number does not include the extra devices that are required
851 for parity. The largest number depends on the RAID type (raid0:
852 64, raid10: 32, raid4/5: 63, raid6: 62), and when unspecified,
853 the default depends on the RAID type (raid0: 2, raid10: 2,
854 raid4/5: 3, raid6: 5.) To stripe a new raid LV across all PVs
855 by default, see lvm.conf(5) allocation/raid_stripe_all_devices.
856 -I|--stripesize Size[k|UNIT]
858 The amount of data that is written to one device before moving
859 to the next in a striped LV.
860 -t|--test
862 Run in test mode. Commands will not update metadata. This is
863 implemented by disabling all metadata writing but nevertheless
864 returning success to the calling function. This may lead to un‐
865 usual error messages in multi-stage operations if a tool relies
866 on reading back metadata it believes has changed but hasn't.
867 -T|--thin
869 Specifies the command is handling a thin LV or thin pool. See
870 --type thin, --type thin-pool, and --virtualsize. See
871 lvmthin(7) for more information about LVM thin provisioning.
872 --thinpool LV
874 The name of a thin pool LV.
875 --type linear|striped|snapshot|raid|mirror|thin|thin-pool|vdo|vdo-pool|
877 cache|cache-pool|writecache
878 The LV type, also known as "segment type" or "segtype". See us‐
879 age descriptions for the specific ways to use these types. For
880 more information about redundancy and performance (raid<N>, mir‐
881 ror, striped, linear) see lvmraid(7). For thin provisioning
882 (thin, thin-pool) see lvmthin(7). For performance caching
883 (cache, cache-pool) see lvmcache(7). For copy-on-write snap‐
884 shots (snapshot) see usage definitions. For VDO (vdo) see lvmv‐
885 do(7). Several commands omit an explicit type option because
886 the type is inferred from other options or shortcuts (e.g.
887 --stripes, --mirrors, --snapshot, --virtualsize, --thin,
888 --cache, --vdo). Use inferred types with care because it can
889 lead to unexpected results.
890 --vdo
892 Specifies the command is handling VDO LV. See --type vdo. See
893 lvmvdo(7) for more information about VDO usage.
894 --vdopool LV
896 The name of a VDO pool LV. See lvmvdo(7) for more information
897 about VDO usage.
898 --vdosettings String
900 Specifies tunable VDO options for VDO LVs. Use the form 'op‐
901 tion=value' or 'option1=value option2=value', or repeat
902 --vdosettings for each option being set. These settings over‐
903 ride the default VDO behaviors. To remove vdosettings and re‐
904 vert to the default VDO behaviors, use --vdosettings 'default'.
905 See lvmvdo(7) for more information.
906 -v|--verbose ...
908 Set verbose level. Repeat from 1 to 4 times to increase the de‐
909 tail of messages sent to stdout and stderr.
910 --version
912 Display version information.
913 -V|--virtualsize Size[m|UNIT]
915 The virtual size of a new thin LV. See lvmthin(7) for more in‐
916 formation about LVM thin provisioning. Using virtual size (-V)
917 and actual size (-L) together creates a sparse LV. lvm.conf(5)
918 global/sparse_segtype_default determines the default segment
919 type used to create a sparse LV. Anything written to a sparse
920 LV will be returned when reading from it. Reading from other
921 areas of the LV will return blocks of zeros. When using a snap‐
922 shot to create a sparse LV, a hidden virtual device is created
923 using the zero target, and the LV has the suffix _vorigin.
924 Snapshots are less efficient than thin provisioning when creat‐
925 ing large sparse LVs (GiB).
926 -W|--wipesignatures y|n
928 Controls detection and subsequent wiping of signatures on new
929 LVs. There is a prompt for each signature detected to confirm
930 its wiping (unless --yes is used to override confirmations.)
931 When not specified, signatures are wiped whenever zeroing is
932 done (see --zero). This behaviour can be configured with
933 lvm.conf(5) allocation/wipe_signatures_when_zeroing_new_lvs. If
934 blkid wiping is used (lvm.conf(5) allocation/use_blkid_wiping)
935 and LVM is compiled with blkid wiping support, then the blkid(8)
936 library is used to detect the signatures (use blkid -k to list
937 the signatures that are recognized). Otherwise, native LVM code
938 is used to detect signatures (only MD RAID, swap and LUKS signa‐
939 tures are detected in this case.) The LV is not wiped if the
940 read only flag is set.
941 -y|--yes
943 Do not prompt for confirmation interactively but always assume
944 the answer yes. Use with extreme caution. (For automatic no,
945 see -qq.)
946 -Z|--zero y|n
948 Controls zeroing of the first 4 KiB of data in the new LV. De‐
949 fault is y. Snapshot COW volumes are always zeroed. For thin
950 pools, this controls zeroing of provisioned blocks. LV is not
951 zeroed if the read only flag is set. Warning: trying to mount
952 an unzeroed LV can cause the system to hang.
953
955 VG Volume Group name. See lvm(8) for valid names. For lvcreate,
956 the required VG positional arg may be omitted when the VG name
957 is included in another option, e.g. --name VG/LV.
958 LV Logical Volume name. See lvm(8) for valid names. An LV posi‐
960 tional arg generally includes the VG name and LV name, e.g.
961 VG/LV. LV1 indicates the LV must have a specific type, where
962 the accepted LV types are listed. (raid represents raid<N>
963 type).
964 PV Physical Volume name, a device path under /dev. For commands
966 managing physical extents, a PV positional arg generally accepts
967 a suffix indicating a range (or multiple ranges) of physical ex‐
968 tents (PEs). When the first PE is omitted, it defaults to the
969 start of the device, and when the last PE is omitted it defaults
970 to end. Start and end range (inclusive): PV[:PE-PE]... Start
971 and length range (counting from 0): PV[:PE+PE]...
972 String See the option description for information about the string con‐
974 tent.
975 Size[UNIT]
977 Size is an input number that accepts an optional unit. Input
978 units are always treated as base two values, regardless of capi‐
979 talization, e.g. 'k' and 'K' both refer to 1024. The default
980 input unit is specified by letter, followed by |UNIT. UNIT rep‐
981 resents other possible input units: b|B is bytes, s|S is sectors
982 of 512 bytes, k|K is KiB, m|M is MiB, g|G is GiB, t|T is TiB,
983 p|P is PiB, e|E is EiB. (This should not be confused with the
984 output control --units, where capital letters mean multiple of
985 1000.)
986
988 See lvm(8) for information about environment variables used by lvm.
989 For example, LVM_VG_NAME can generally be substituted for a required VG
990 parameter.
991
993 Alternate command forms, advanced command usage, and listing of all
994 valid syntax for completeness.
995 Create an LV that returns errors when used.
997 lvcreate --type error -L|--size Size[m|UNIT] VG
999 [ -l|--extents Number[PERCENT] ]
1000 [ COMMON_OPTIONS ]
1001 —
1003 Create an LV that returns zeros when read.
1005 lvcreate --type zero -L|--size Size[m|UNIT] VG
1007 [ -l|--extents Number[PERCENT] ]
1008 [ COMMON_OPTIONS ]
1009 —
1011 Create a linear LV.
1013 lvcreate --type linear -L|--size Size[m|UNIT] VG
1015 [ -l|--extents Number[PERCENT] ]
1016 [ COMMON_OPTIONS ]
1017 [ PV ... ]
1018 —
1020 Create a striped LV (also see lvcreate --stripes).
1022 lvcreate --type striped -L|--size Size[m|UNIT] VG
1024 [ -l|--extents Number[PERCENT] ]
1025 [ -i|--stripes Number ]
1026 [ -I|--stripesize Size[k|UNIT] ]
1027 [ COMMON_OPTIONS ]
1028 [ PV ... ]
1029 —
1031 Create a mirror LV (also see --type raid1).
1033 lvcreate --type mirror -L|--size Size[m|UNIT] VG
1035 [ -l|--extents Number[PERCENT] ]
1036 [ -i|--stripes Number ]
1037 [ -I|--stripesize Size[k|UNIT] ]
1038 [ -m|--mirrors Number ]
1039 [ -R|--regionsize Size[m|UNIT] ]
1040 [ --mirrorlog core|disk ]
1041 [ COMMON_OPTIONS ]
1042 [ PV ... ]
1043 —
1045 Create a COW snapshot LV of an origin LV
1047 (also see --snapshot).
1048 lvcreate --type snapshot -L|--size Size[m|UNIT] LV
1050 [ -l|--extents Number[PERCENT] ]
1051 [ -s|--snapshot ]
1052 [ -i|--stripes Number ]
1053 [ -I|--stripesize Size[k|UNIT] ]
1054 [ -c|--chunksize Size[k|UNIT] ]
1055 [ COMMON_OPTIONS ]
1056 [ PV ... ]
1057 —
1059 Create a sparse COW snapshot LV of a virtual origin LV
1061 (also see --snapshot).
1062 lvcreate --type snapshot -L|--size Size[m|UNIT]
1064 -V|--virtualsize Size[m|UNIT] VG
1065 [ -l|--extents Number[PERCENT] ]
1066 [ -s|--snapshot ]
1067 [ -c|--chunksize Size[k|UNIT] ]
1068 [ COMMON_OPTIONS ]
1069 [ PV ... ]
1070 —
1072 Create a thin pool.
1074 lvcreate -T|--thin -L|--size Size[m|UNIT] VG
1076 [ --type thin-pool ] (implied)
1077 [ -l|--extents Number[PERCENT] ]
1078 [ -i|--stripes Number ]
1079 [ -I|--stripesize Size[k|UNIT] ]
1080 [ -c|--chunksize Size[k|UNIT] ]
1081 [ --discards passdown|nopassdown|ignore ]
1082 [ --errorwhenfull y|n ]
1083 [ --poolmetadatasize Size[m|UNIT] ]
1084 [ --poolmetadataspare y|n ]
1085 [ COMMON_OPTIONS ]
1086 [ PV ... ]
1087 —
1089 Create a thin pool named in --thinpool.
1091 lvcreate -L|--size Size[m|UNIT] --thinpool LV_new VG
1093 [ --type thin-pool ] (implied)
1094 [ -l|--extents Number[PERCENT] ]
1095 [ -i|--stripes Number ]
1096 [ -I|--stripesize Size[k|UNIT] ]
1097 [ -T|--thin ]
1098 [ -c|--chunksize Size[k|UNIT] ]
1099 [ --discards passdown|nopassdown|ignore ]
1100 [ --errorwhenfull y|n ]
1101 [ --poolmetadatasize Size[m|UNIT] ]
1102 [ --poolmetadataspare y|n ]
1103 [ COMMON_OPTIONS ]
1104 [ PV ... ]
1105 —
1107 Create a cache pool named by the --cachepool arg
1109 (variant, uses --cachepool in place of --name).
1110 lvcreate --type cache-pool -L|--size Size[m|UNIT]
1112 --cachepool LV_new VG
1113 [ -l|--extents Number[PERCENT] ]
1114 [ -i|--stripes Number ]
1115 [ -I|--stripesize Size[k|UNIT] ]
1116 [ -H|--cache ]
1117 [ -c|--chunksize Size[k|UNIT] ]
1118 [ --cachemode writethrough|writeback|passthrough ]
1119 [ --cachepolicy String ]
1120 [ --cachesettings String ]
1121 [ --cachemetadataformat auto|1|2 ]
1122 [ --poolmetadatasize Size[m|UNIT] ]
1123 [ --poolmetadataspare y|n ]
1124 [ COMMON_OPTIONS ]
1125 [ PV ... ]
1126 —
1128 Create a thin LV in a thin pool.
1130 lvcreate --type thin -V|--virtualsize Size[m|UNIT]
1132 --thinpool LV VG
1133 [ -T|--thin ]
1134 [ COMMON_OPTIONS ]
1135 —
1137 Create a thin LV in a thin pool named in the first arg
1139 (variant, also see --thinpool for naming pool).
1140 lvcreate --type thin -V|--virtualsize Size[m|UNIT] LV1
1142 [ -T|--thin ]
1143 [ COMMON_OPTIONS ]
1144 LV1 types: thinpool
1146 —
1148 Create a thin LV in the thin pool named in the first arg
1150 (also see --thinpool for naming pool.)
1151 lvcreate -V|--virtualsize Size[m|UNIT] LV1
1153 [ --type thin ] (implied)
1154 [ -T|--thin ]
1155 [ COMMON_OPTIONS ]
1156 LV1 types: thinpool
1158 —
1160 Create a thin LV that is a snapshot of an existing thin LV.
1162 lvcreate --type thin LV1
1164 [ -T|--thin ]
1165 [ -s|--snapshot ]
1166 [ COMMON_OPTIONS ]
1167 LV1 types: thin
1169 —
1171 Create a thin LV that is a snapshot of an existing thin LV.
1173 lvcreate -T|--thin LV1
1175 [ --type thin ] (implied)
1176 [ -s|--snapshot ]
1177 [ COMMON_OPTIONS ]
1178 LV1 types: thin
1180 —
1182 Create a thin LV that is a snapshot of an external origin LV.
1184 lvcreate -s|--snapshot --thinpool LV LV
1186 [ --type thin ] (implied)
1187 [ COMMON_OPTIONS ]
1188 —
1190 Create a VDO LV with VDO pool.
1192 lvcreate --vdo -L|--size Size[m|UNIT] VG
1194 [ --type vdo ] (implied)
1195 [ -l|--extents Number[PERCENT] ]
1196 [ -i|--stripes Number ]
1197 [ -I|--stripesize Size[k|UNIT] ]
1198 [ -V|--virtualsize Size[m|UNIT] ]
1199 [ --vdopool LV_new ]
1200 [ --compression y|n ]
1201 [ --deduplication y|n ]
1202 [ --vdosettings String ]
1203 [ COMMON_OPTIONS ]
1204 [ PV ... ]
1205 —
1207 Create a VDO LV with VDO pool.
1209 lvcreate --vdopool LV_new -L|--size Size[m|UNIT] VG
1211 [ --type vdo ] (implied)
1212 [ -l|--extents Number[PERCENT] ]
1213 [ -i|--stripes Number ]
1214 [ -I|--stripesize Size[k|UNIT] ]
1215 [ -V|--virtualsize Size[m|UNIT] ]
1216 [ --compression y|n ]
1217 [ --deduplication y|n ]
1218 [ --vdosettings String ]
1219 [ COMMON_OPTIONS ]
1220 [ PV ... ]
1221 —
1223 Create a thin LV, first creating a thin pool for it,
1225 where the new thin pool is named by the --thinpool arg.
1226 lvcreate --type thin -V|--virtualsize Size[m|UNIT]
1228 -L|--size Size[m|UNIT] --thinpool LV_new VG
1229 [ -l|--extents Number[PERCENT] ]
1230 [ -i|--stripes Number ]
1231 [ -I|--stripesize Size[k|UNIT] ]
1232 [ -T|--thin ]
1233 [ -c|--chunksize Size[k|UNIT] ]
1234 [ --discards passdown|nopassdown|ignore ]
1235 [ --errorwhenfull y|n ]
1236 [ --poolmetadatasize Size[m|UNIT] ]
1237 [ --poolmetadataspare y|n ]
1238 [ COMMON_OPTIONS ]
1239 [ PV ... ]
1240 —
1242 Create a thin LV, first creating a thin pool for it,
1244 where the new thin pool is named by --thinpool.
1245 lvcreate -V|--virtualsize Size[m|UNIT] -L|--size Size[m|UNIT]
1247 --thinpool LV_new VG
1248 [ --type thin ] (implied)
1249 [ -l|--extents Number[PERCENT] ]
1250 [ -i|--stripes Number ]
1251 [ -I|--stripesize Size[k|UNIT] ]
1252 [ -T|--thin ]
1253 [ -c|--chunksize Size[k|UNIT] ]
1254 [ --discards passdown|nopassdown|ignore ]
1255 [ --errorwhenfull y|n ]
1256 [ --poolmetadatasize Size[m|UNIT] ]
1257 [ --poolmetadataspare y|n ]
1258 [ COMMON_OPTIONS ]
1259 [ PV ... ]
1260 —
1262 Create a thin LV, first creating a thin pool for it,
1264 where the new thin pool is named in the first arg,
1265 or the new thin pool name is generated when the first
1266 arg is a VG name.
1267 lvcreate --type thin -V|--virtualsize Size[m|UNIT]
1269 -L|--size Size[m|UNIT] VG|LV_new
1270 [ -l|--extents Number[PERCENT] ]
1271 [ -i|--stripes Number ]
1272 [ -I|--stripesize Size[k|UNIT] ]
1273 [ -T|--thin ]
1274 [ -c|--chunksize Size[k|UNIT] ]
1275 [ --discards passdown|nopassdown|ignore ]
1276 [ --errorwhenfull y|n ]
1277 [ --poolmetadatasize Size[m|UNIT] ]
1278 [ --poolmetadataspare y|n ]
1279 [ COMMON_OPTIONS ]
1280 [ PV ... ]
1281 —
1283 Create a thin LV, first creating a thin pool for it,
1285 where the new thin pool is named in the first arg,
1286 or the new thin pool name is generated when the first
1287 arg is a VG name.
1288 lvcreate -T|--thin -V|--virtualsize Size[m|UNIT]
1290 -L|--size Size[m|UNIT] VG|LV_new
1291 [ --type thin ] (implied)
1292 [ -l|--extents Number[PERCENT] ]
1293 [ -i|--stripes Number ]
1294 [ -I|--stripesize Size[k|UNIT] ]
1295 [ -c|--chunksize Size[k|UNIT] ]
1296 [ --discards passdown|nopassdown|ignore ]
1297 [ --errorwhenfull y|n ]
1298 [ --poolmetadatasize Size[m|UNIT] ]
1299 [ --poolmetadataspare y|n ]
1300 [ COMMON_OPTIONS ]
1301 [ PV ... ]
1302 —
1304 Create a thin LV, first creating a thin pool for it.
1306 Create a sparse snapshot of a virtual origin LV
1307 Chooses type thin or snapshot according to
1308 config setting sparse_segtype_default.
1309 lvcreate -L|--size Size[m|UNIT] -V|--virtualsize Size[m|UNIT] VG
1311 [ --type thin|snapshot ] (implied)
1312 [ -l|--extents Number[PERCENT] ]
1313 [ -i|--stripes Number ]
1314 [ -I|--stripesize Size[k|UNIT] ]
1315 [ -s|--snapshot ]
1316 [ -T|--thin ]
1317 [ -c|--chunksize Size[k|UNIT] ]
1318 [ --discards passdown|nopassdown|ignore ]
1319 [ --errorwhenfull y|n ]
1320 [ --poolmetadatasize Size[m|UNIT] ]
1321 [ --poolmetadataspare y|n ]
1322 [ COMMON_OPTIONS ]
1323 [ PV ... ]
1324 —
1326 Create a new LV, then attach the specified cachepool
1328 which converts the new LV to type cache.
1329 lvcreate -L|--size Size[m|UNIT] --cachepool LV VG
1331 [ --type cache ] (implied)
1332 [ -l|--extents Number[PERCENT] ]
1333 [ -i|--stripes Number ]
1334 [ -I|--stripesize Size[k|UNIT] ]
1335 [ -H|--cache ]
1336 [ -c|--chunksize Size[k|UNIT] ]
1337 [ --cachemode writethrough|writeback|passthrough ]
1338 [ --cachepolicy String ]
1339 [ --cachesettings String ]
1340 [ --cachemetadataformat auto|1|2 ]
1341 [ COMMON_OPTIONS ]
1342 [ PV ... ]
1343 —
1345 Create a new LV, then attach the specified cachepool
1347 which converts the new LV to type cache.
1348 (variant, also use --cachepool).
1349 lvcreate --type cache -L|--size Size[m|UNIT] LV1
1351 [ -l|--extents Number[PERCENT] ]
1352 [ -i|--stripes Number ]
1353 [ -I|--stripesize Size[k|UNIT] ]
1354 [ -H|--cache ]
1355 [ -c|--chunksize Size[k|UNIT] ]
1356 [ --cachemode writethrough|writeback|passthrough ]
1357 [ --cachepolicy String ]
1358 [ --cachesettings String ]
1359 [ --cachemetadataformat auto|1|2 ]
1360 [ --poolmetadatasize Size[m|UNIT] ]
1361 [ --poolmetadataspare y|n ]
1362 [ COMMON_OPTIONS ]
1363 [ PV ... ]
1364 LV1 types: cachepool
1366 —
1368 When the LV arg is a cachepool, then create a new LV and
1370 attach the cachepool arg to it.
1371 (variant, use --type cache and --cachepool.)
1372 When the LV arg is not a cachepool, then create a new cachepool
1373 and attach it to the LV arg (alternative, use lvconvert.)
1374 lvcreate -H|--cache -L|--size Size[m|UNIT] LV
1376 [ --type cache ] (implied)
1377 [ -l|--extents Number[PERCENT] ]
1378 [ -c|--chunksize Size[k|UNIT] ]
1379 [ -i|--stripes Number ]
1380 [ -I|--stripesize Size[k|UNIT] ]
1381 [ --cachemode writethrough|writeback|passthrough ]
1382 [ --cachepolicy String ]
1383 [ --cachesettings String ]
1384 [ --cachemetadataformat auto|1|2 ]
1385 [ --poolmetadatasize Size[m|UNIT] ]
1386 [ --poolmetadataspare y|n ]
1387 [ COMMON_OPTIONS ]
1388 [ PV ... ]
1389 —
1391
1393 Create a striped LV with 3 stripes, a stripe size of 8 KiB and a size
1394 of 100 MiB. The LV name is chosen by lvcreate.
1395 lvcreate -i 3 -I 8 -L 100m vg00
1396 Create a raid1 LV with two images, and a usable size of 500 MiB. This
1398 operation requires two devices, one for each mirror image. RAID metada‐
1399 ta (superblock and bitmap) is also included on the two devices.
1400 lvcreate --type raid1 -m1 -L 500m -n mylv vg00
1401 Create a mirror LV with two images, and a usable size of 500 MiB. This
1403 operation requires three devices: two for mirror images and one for a
1404 disk log.
1405 lvcreate --type mirror -m1 -L 500m -n mylv vg00
1406 Create a mirror LV with 2 images, and a usable size of 500 MiB. This
1408 operation requires 2 devices because the log is in memory.
1409 lvcreate --type mirror -m1 --mirrorlog core -L 500m -n mylv vg00
1410 Create a copy-on-write snapshot of an LV:
1412 lvcreate --snapshot --size 100m --name mysnap vg00/mylv
1413 Create a copy-on-write snapshot with a size sufficient for overwriting
1415 20% of the size of the original LV.
1416 lvcreate -s -l 20%ORIGIN -n mysnap vg00/mylv
1417 Create a sparse LV with 1 TiB of virtual space, and actual space just
1419 under 100 MiB.
1420 lvcreate --snapshot --virtualsize 1t --size 100m --name mylv vg00
1421 Create a linear LV with a usable size of 64 MiB on specific physical
1423 extents.
1424 lvcreate -L 64m -n mylv vg00 /dev/sda:0-7 /dev/sdb:0-7
1425 Create a RAID5 LV with a usable size of 5 GiB, 3 stripes, a stripe size
1427 of 64 KiB, using a total of 4 devices (including one for parity).
1428 lvcreate --type raid5 -L 5G -i 3 -I 64 -n mylv vg00
1429 Create a RAID5 LV using all of the free space in the VG and spanning
1431 all the PVs in the VG (note that the command will fail if there are
1432 more than 8 PVs in the VG, in which case -i 7 must be used to get to
1433 the current maximum of 8 devices including parity for RaidLVs).
1434 lvcreate --config allocation/raid_stripe_all_devices=1
1435 --type raid5 -l 100%FREE -n mylv vg00
1436 Create RAID10 LV with a usable size of 5 GiB, using 2 stripes, each on
1438 a two-image mirror. (Note that the -i and -m arguments behave differ‐
1439 ently: -i specifies the total number of stripes, but -m specifies the
1440 number of images in addition to the first image).
1441 lvcreate --type raid10 -L 5G -i 2 -m 1 -n mylv vg00
1442 Create a 1 TiB thin LV mythin, with 256 GiB thinpool tpool0 in vg00.
1444 lvcreate -T -V 1T --size 256G --name mythin vg00/tpool0
1445 Create a 1 TiB thin LV, first creating a new thin pool for it, where
1447 the thin pool has 100 MiB of space, uses 2 stripes, has a 64 KiB stripe
1448 size, and 256 KiB chunk size.
1449 lvcreate --type thin --name mylv --thinpool mypool
1450 -V 1t -L 100m -i 2 -I 64 -c 256 vg00
1451 Create a thin snapshot of a thin LV (the size option must not be used,
1453 otherwise a copy-on-write snapshot would be created).
1454 lvcreate --snapshot --name mysnap vg00/thinvol
1455 Create a thin snapshot of the read-only inactive LV named "origin"
1457 which becomes an external origin for the thin snapshot LV.
1458 lvcreate --snapshot --name mysnap --thinpool mypool vg00/origin
1459 Create a cache pool from a fast physical device. The cache pool can
1461 then be used to cache an LV.
1462 lvcreate --type cache-pool -L 1G -n my_cpool vg00 /dev/fast1
1463 Create a cache LV, first creating a new origin LV on a slow physical
1465 device, then combining the new origin LV with an existing cache pool.
1466 lvcreate --type cache --cachepool my_cpool
1467 -L 100G -n mylv vg00 /dev/slow1
1468 Create a VDO LV vdo0 with VDOPoolLV size of 10 GiB and name vpool1.
1470 lvcreate --vdo --size 10G --name vdo0 vg00/vpool1
1471
1473 lvm(8), lvm.conf(5), lvmconfig(8), lvmdevices(8),
1474 pvchange(8), pvck(8), pvcreate(8), pvdisplay(8), pvmove(8),
1476 pvremove(8), pvresize(8), pvs(8), pvscan(8),
1477 vgcfgbackup(8), vgcfgrestore(8), vgchange(8), vgck(8), vgcreate(8),
1479 vgconvert(8), vgdisplay(8), vgexport(8), vgextend(8), vgimport(8),
1480 vgimportclone(8), vgimportdevices(8), vgmerge(8), vgmknodes(8),
1481 vgreduce(8), vgremove(8), vgrename(8), vgs(8), vgscan(8), vgsplit(8),
1482 lvcreate(8), lvchange(8), lvconvert(8), lvdisplay(8), lvextend(8),
1484 lvreduce(8), lvremove(8), lvrename(8), lvresize(8), lvs(8), lvscan(8),
1485 lvm-fullreport(8), lvm-lvpoll(8), blkdeactivate(8), lvmdump(8),
1487 dmeventd(8), lvmpolld(8), lvmlockd(8), lvmlockctl(8), cmirrord(8),
1489 lvmdbusd(8), fsadm(8),
1490 lvmsystemid(7), lvmreport(7), lvmcache(7), lvmraid(7), lvmthin(7),
1492 lvmvdo(7), lvmautoactivation(7)
1493Red Hat, Inc. LVM TOOLS 2.03.22(2) (2023-08-02) LVCREATE(8)