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 --discards passdown|nopassdown|ignore
34 --driverloaded y|n
35 --errorwhenfull y|n
36 -l|--extents Number[PERCENT]
37 -h|--help
38 -K|--ignoreactivationskip
39 --ignoremonitoring
40 --lockopt String
41 --longhelp
42 -j|--major Number
43 --[raid]maxrecoveryrate Size[k|UNIT]
44 --metadataprofile String
45 --minor Number
46 --[raid]minrecoveryrate Size[k|UNIT]
47 --mirrorlog core|disk
48 -m|--mirrors Number
49 --monitor y|n
50 -n|--name String
51 --nolocking
52 --nosync
53 --noudevsync
54 -p|--permission rw|r
55 -M|--persistent y|n
56 --poolmetadatasize Size[m|UNIT]
57 --poolmetadataspare y|n
58 --profile String
59 -q|--quiet
60 --raidintegrity y|n
61 --raidintegrityblocksize Number
62 --raidintegritymode String
63 -r|--readahead auto|none|Number
64 -R|--regionsize Size[m|UNIT]
65 --reportformat basic|json
66 -k|--setactivationskip y|n
67 -L|--size Size[m|UNIT]
68 -s|--snapshot
69 -i|--stripes Number
70 -I|--stripesize Size[k|UNIT]
71 -t|--test
72 -T|--thin
73 --thinpool LV
74 --type linear|striped|snapshot|mir‐
75 ror|raid|thin|cache|vdo|thin-pool|cache-pool|vdo-pool
76 --vdo
77 --vdopool LV
78 -v|--verbose
79 --version
80 -V|--virtualsize Size[m|UNIT]
81 -W|--wipesignatures y|n
82 -y|--yes
83 -Z|--zero y|n
84
86 lvcreate creates a new LV in a VG. For standard LVs, this requires al‐
87 locating logical extents from the VG's free physical extents. If there
88 is not enough free space, the VG can be extended with other PVs (vgex‐
89 tend(8)), or existing LVs can be reduced or removed (lvremove(8), lvre‐
90 duce(8).)
91 To control which PVs a new LV will use, specify one or more PVs as po‐
93 sition args at the end of the command line. lvcreate will allocate
94 physical extents only from the specified PVs.
95 lvcreate can also create snapshots of existing LVs, e.g. for backup
97 purposes. The data in a new snapshot LV represents the content of the
98 original LV from the time the snapshot was created.
99 RAID LVs can be created by specifying an LV type when creating the LV
101 (see lvmraid(7)). Different RAID levels require different numbers of
102 unique PVs be available in the VG for allocation.
103 Thin pools (for thin provisioning) and cache pools (for caching) are
105 represented by special LVs with types thin-pool and cache-pool (see
106 lvmthin(7) and lvmcache(7)). The pool LVs are not usable as standard
107 block devices, but the LV names act as references to the pools.
108 Thin LVs are thinly provisioned from a thin pool, and are created with
110 a virtual size rather than a physical size. A cache LV is the combina‐
111 tion of a standard LV with a cache pool, used to cache active portions
112 of the LV to improve performance.
113 VDO LVs are also provisioned volumes from a VDO pool, and are created
115 with a virtual size rather than a physical size (see lvmvdo(7)).
116 Usage notes
119 In the usage section below, --size Size can be replaced with --extents
120 Number. See descriptions in the options section.
121 In the usage section below, --name is omitted from the required op‐
123 tions, even though it is typically used. When the name is not speci‐
124 fied, a new LV name is generated with the "lvol" prefix and a unique
125 numeric suffix.
126 In the usage section below, when creating a pool and the name is omit‐
128 ted the new LV pool name is generated with the "vpool" for vdo-pools
129 for prefix and a unique numeric suffix.
130 Pool name can be specified together with VG name i.e.: vg00/mythinpool.
132
134 Create a linear LV.
135 lvcreate -L|--size Size[m|UNIT] VG
137 [ -l|--extents Number[PERCENT] ]
138 [ --type linear ]
139 [ COMMON_OPTIONS ]
140 [ PV ... ]
141 -
142 Create a striped LV (infers --type striped).
144 lvcreate -i|--stripes Number -L|--size Size[m|UNIT] VG
146 [ -l|--extents Number[PERCENT] ]
147 [ -I|--stripesize Size[k|UNIT] ]
148 [ COMMON_OPTIONS ]
149 [ PV ... ]
150 -
151 Create a raid1 or mirror LV (infers --type raid1|mirror).
153 lvcreate -m|--mirrors Number -L|--size Size[m|UNIT] VG
155 [ -l|--extents Number[PERCENT] ]
156 [ -R|--regionsize Size[m|UNIT] ]
157 [ --mirrorlog core|disk ]
158 [ --[raid]minrecoveryrate Size[k|UNIT] ]
159 [ --[raid]maxrecoveryrate Size[k|UNIT] ]
160 [ COMMON_OPTIONS ]
161 [ PV ... ]
162 -
163 Create a raid LV (a specific raid level must be used, e.g. raid1).
165 lvcreate --type raid -L|--size Size[m|UNIT] VG
167 [ -l|--extents Number[PERCENT] ]
168 [ -m|--mirrors Number ]
169 [ -i|--stripes Number ]
170 [ -I|--stripesize Size[k|UNIT] ]
171 [ -R|--regionsize Size[m|UNIT] ]
172 [ --[raid]minrecoveryrate Size[k|UNIT] ]
173 [ --[raid]maxrecoveryrate Size[k|UNIT] ]
174 [ --raidintegrity y|n ]
175 [ --raidintegritymode String ]
176 [ --raidintegrityblocksize Number ]
177 [ COMMON_OPTIONS ]
178 [ PV ... ]
179 -
180 Create a raid10 LV.
182 lvcreate -m|--mirrors Number -i|--stripes Number
184 -L|--size Size[m|UNIT] VG
185 [ -l|--extents Number[PERCENT] ]
186 [ -I|--stripesize Size[k|UNIT] ]
187 [ -R|--regionsize Size[m|UNIT] ]
188 [ --[raid]minrecoveryrate Size[k|UNIT] ]
189 [ --[raid]maxrecoveryrate Size[k|UNIT] ]
190 [ COMMON_OPTIONS ]
191 [ PV ... ]
192 -
193 Create a COW snapshot LV of an origin LV.
195 lvcreate -s|--snapshot -L|--size Size[m|UNIT] LV
197 [ -l|--extents Number[PERCENT] ]
198 [ -i|--stripes Number ]
199 [ -I|--stripesize Size[k|UNIT] ]
200 [ -c|--chunksize Size[k|UNIT] ]
201 [ --type snapshot ]
202 [ COMMON_OPTIONS ]
203 [ PV ... ]
204 -
205 Create a thin pool.
207 lvcreate --type thin-pool -L|--size Size[m|UNIT] VG
209 [ -l|--extents Number[PERCENT] ]
210 [ -c|--chunksize Size[k|UNIT] ]
211 [ -i|--stripes Number ]
212 [ -I|--stripesize Size[k|UNIT] ]
213 [ --thinpool LV_new ]
214 [ --poolmetadatasize Size[m|UNIT] ]
215 [ --poolmetadataspare y|n ]
216 [ --discards passdown|nopassdown|ignore ]
217 [ --errorwhenfull y|n ]
218 [ COMMON_OPTIONS ]
219 [ PV ... ]
220 -
221 Create a cache pool.
223 lvcreate --type cache-pool -L|--size Size[m|UNIT] VG
225 [ -l|--extents Number[PERCENT] ]
226 [ -H|--cache ]
227 [ -c|--chunksize Size[k|UNIT] ]
228 [ --poolmetadatasize Size[m|UNIT] ]
229 [ --poolmetadataspare y|n ]
230 [ --cachemode writethrough|writeback|passthrough ]
231 [ --cachepolicy String ]
232 [ --cachesettings String ]
233 [ --cachemetadataformat auto|1|2 ]
234 [ COMMON_OPTIONS ]
235 [ PV ... ]
236 -
237 Create a thin LV in a thin pool (infers --type thin).
239 lvcreate -V|--virtualsize Size[m|UNIT] --thinpool LV_thinpool VG
241 [ -T|--thin ]
242 [ --type thin ]
243 [ --discards passdown|nopassdown|ignore ]
244 [ --errorwhenfull y|n ]
245 [ COMMON_OPTIONS ]
246 -
247 Create a thin LV that is a snapshot of an existing thin LV
249 (infers --type thin).
250 lvcreate -s|--snapshot LV_thin
252 [ --type thin ]
253 [ --discards passdown|nopassdown|ignore ]
254 [ --errorwhenfull y|n ]
255 [ COMMON_OPTIONS ]
256 -
257 Create a thin LV that is a snapshot of an external origin LV.
259 lvcreate --type thin --thinpool LV_thinpool LV
261 [ -T|--thin ]
262 [ -c|--chunksize Size[k|UNIT] ]
263 [ --poolmetadatasize Size[m|UNIT] ]
264 [ --poolmetadataspare y|n ]
265 [ --discards passdown|nopassdown|ignore ]
266 [ --errorwhenfull y|n ]
267 [ COMMON_OPTIONS ]
268 -
269 Create a LV that returns VDO when used.
271 lvcreate --type vdo -L|--size Size[m|UNIT] VG
273 [ -l|--extents Number[PERCENT] ]
274 [ -V|--virtualsize Size[m|UNIT] ]
275 [ -i|--stripes Number ]
276 [ -I|--stripesize Size[k|UNIT] ]
277 [ --vdo ]
278 [ --vdopool LV_new ]
279 [ --compression y|n ]
280 [ --deduplication y|n ]
281 [ COMMON_OPTIONS ]
282 [ PV ... ]
283 -
284 Create a thin LV, first creating a thin pool for it,
286 where the new thin pool is named by the --thinpool arg.
287 lvcreate --type thin -V|--virtualsize Size[m|UNIT]
289 -L|--size Size[m|UNIT] --thinpool LV_new
290 [ -l|--extents Number[PERCENT] ]
291 [ -T|--thin ]
292 [ -c|--chunksize Size[k|UNIT] ]
293 [ -i|--stripes Number ]
294 [ -I|--stripesize Size[k|UNIT] ]
295 [ --poolmetadatasize Size[m|UNIT] ]
296 [ --poolmetadataspare y|n ]
297 [ --discards passdown|nopassdown|ignore ]
298 [ --errorwhenfull y|n ]
299 [ COMMON_OPTIONS ]
300 [ PV ... ]
301 -
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_cachepool VG
308 [ -l|--extents Number[PERCENT] ]
309 [ -H|--cache ]
310 [ -c|--chunksize Size[k|UNIT] ]
311 [ -i|--stripes Number ]
312 [ -I|--stripesize Size[k|UNIT] ]
313 [ --poolmetadatasize Size[m|UNIT] ]
314 [ --poolmetadataspare y|n ]
315 [ --cachemode writethrough|writeback|passthrough ]
316 [ --cachepolicy String ]
317 [ --cachesettings String ]
318 [ --cachemetadataformat auto|1|2 ]
319 [ COMMON_OPTIONS ]
320 [ PV ... ]
321 -
322 Create a new LV, then attach the specified cachevol
324 which converts the new LV to type cache.
325 lvcreate --type cache -L|--size Size[m|UNIT]
327 --cachevol LV VG
328 [ -l|--extents Number[PERCENT] ]
329 [ -c|--chunksize Size[k|UNIT] ]
330 [ -i|--stripes Number ]
331 [ -I|--stripesize Size[k|UNIT] ]
332 [ --cachemode writethrough|writeback|passthrough ]
333 [ --cachepolicy String ]
334 [ --cachesettings String ]
335 [ --cachemetadataformat auto|1|2 ]
336 [ COMMON_OPTIONS ]
337 [ PV ... ]
338 -
339 Create a new LV, then attach a cachevol created from
341 the specified cache device, which converts the
342 new LV to type cache.
343 lvcreate --type cache -L|--size Size[m|UNIT]
345 --cachedevice PV VG
346 [ -l|--extents Number[PERCENT] ]
347 [ -c|--chunksize Size[k|UNIT] ]
348 [ -i|--stripes Number ]
349 [ -I|--stripesize Size[k|UNIT] ]
350 [ --cachemode writethrough|writeback|passthrough ]
351 [ --cachepolicy String ]
352 [ --cachesettings String ]
353 [ --cachemetadataformat auto|1|2 ]
354 [ --cachesize Size[m|UNIT] ]
355 [ COMMON_OPTIONS ]
356 [ PV ... ]
357 -
358 Create a new LV, then attach the specified cachevol
360 which converts the new LV to type writecache.
361 lvcreate --type writecache -L|--size Size[m|UNIT]
363 --cachevol LV VG
364 [ -l|--extents Number[PERCENT] ]
365 [ -i|--stripes Number ]
366 [ -I|--stripesize Size[k|UNIT] ]
367 [ --cachesettings String ]
368 [ COMMON_OPTIONS ]
369 [ PV ... ]
370 -
371 Create a new LV, then attach a cachevol created from
373 the specified cache device, which converts the
374 new LV to type writecache.
375 lvcreate --type writecache -L|--size Size[m|UNIT]
377 --cachedevice PV VG
378 [ -l|--extents Number[PERCENT] ]
379 [ -i|--stripes Number ]
380 [ -I|--stripesize Size[k|UNIT] ]
381 [ --cachesize Size[m|UNIT] ]
382 [ --cachesettings String ]
383 [ COMMON_OPTIONS ]
384 [ PV ... ]
385 -
386 Common options for command:
388 [ -a|--activate y|n|ay ]
389 [ -A|--autobackup y|n ]
390 [ -C|--contiguous y|n ]
391 [ -K|--ignoreactivationskip ]
392 [ -j|--major Number ]
393 [ -n|--name String ]
394 [ -p|--permission rw|r ]
395 [ -M|--persistent y|n ]
396 [ -r|--readahead auto|none|Number ]
397 [ -k|--setactivationskip y|n ]
398 [ -W|--wipesignatures y|n ]
399 [ -Z|--zero y|n ]
400 [ --addtag Tag ]
401 [ --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
402 ]
403 [ --ignoremonitoring ]
404 [ --metadataprofile String ]
405 [ --minor Number ]
406 [ --monitor y|n ]
407 [ --nosync ]
408 [ --noudevsync ]
409 [ --reportformat basic|json ]
410 Common options for lvm:
412 [ -d|--debug ]
413 [ -h|--help ]
414 [ -q|--quiet ]
415 [ -t|--test ]
416 [ -v|--verbose ]
417 [ -y|--yes ]
418 [ --commandprofile String ]
419 [ --config String ]
420 [ --driverloaded y|n ]
421 [ --lockopt String ]
422 [ --longhelp ]
423 [ --nolocking ]
424 [ --profile String ]
425 [ --version ]
426
428 -a|--activate y|n|ay
429 Controls the active state of the new LV. y makes the LV active,
430 or available. New LVs are made active by default. n makes the
431 LV inactive, or unavailable, only when possible. In some cases,
432 creating an LV requires it to be active. For example, COW snap‐
433 shots of an active origin LV can only be created in the active
434 state (this does not apply to thin snapshots). The --zero op‐
435 tion normally requires the LV to be active. If autoactivation
436 ay is used, the LV is only activated if it matches an item in
437 lvm.conf activation/auto_activation_volume_list. ay implies
438 --zero n and --wipesignatures n. See lvmlockd(8) for more in‐
439 formation about activation options for shared VGs.
440 --addtag Tag
442 Adds a tag to a PV, VG or LV. This option can be repeated to add
443 multiple tags at once. See lvm(8) for information about tags.
444 --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
446 Determines the allocation policy when a command needs to allo‐
447 cate Physical Extents (PEs) from the VG. Each VG and LV has an
448 allocation policy which can be changed with vgchange/lvchange,
449 or overriden on the command line. normal applies common sense
450 rules such as not placing parallel stripes on the same PV. in‐
451 herit applies the VG policy to an LV. contiguous requires new
452 PEs be placed adjacent to existing PEs. cling places new PEs on
453 the same PV as existing PEs in the same stripe of the LV. If
454 there are sufficient PEs for an allocation, but normal does not
455 use them, anywhere will use them even if it reduces performance,
456 e.g. by placing two stripes on the same PV. Optional positional
457 PV args on the command line can also be used to limit which PVs
458 the command will use for allocation. See lvm(8) for more infor‐
459 mation about allocation.
460 -A|--autobackup y|n
462 Specifies if metadata should be backed up automatically after a
463 change. Enabling this is strongly advised! See vgcfgbackup(8)
464 for more information.
465 -H|--cache
467 Specifies the command is handling a cache LV or cache pool. See
468 --type cache and --type cache-pool. See lvmcache(7) for more
469 information about LVM caching.
470 --cachedevice PV
472 The name of a device to use for a cache.
473 --cachemetadataformat auto|1|2
475 Specifies the cache metadata format used by cache target.
476 --cachemode writethrough|writeback|passthrough
478 Specifies when writes to a cache LV should be considered com‐
479 plete. writeback considers a write complete as soon as it is
480 stored in the cache pool. writethough considers a write com‐
481 plete only when it has been stored in both the cache pool and on
482 the origin LV. While writethrough may be slower for writes, it
483 is more resilient if something should happen to a device associ‐
484 ated with the cache pool LV. With passthrough, all reads are
485 served from the origin LV (all reads miss the cache) and all
486 writes are forwarded to the origin LV; additionally, write hits
487 cause cache block invalidates. See lvmcache(7) for more informa‐
488 tion.
489 --cachepolicy String
491 Specifies the cache policy for a cache LV. See lvmcache(7) for
492 more information.
493 --cachepool LV
495 The name of a cache pool.
496 --cachesettings String
498 Specifies tunable values for a cache LV in "Key = Value" form.
499 Repeat this option to specify multiple values. (The default
500 values should usually be adequate.) The special string value
501 default switches settings back to their default kernel values
502 and removes them from the list of settings stored in LVM meta‐
503 data. See lvmcache(7) for more information.
504 --cachesize Size[m|UNIT]
506 The size of cache to use.
507 --cachevol LV
509 The name of a cache volume.
510 -c|--chunksize Size[k|UNIT]
512 The size of chunks in a snapshot, cache pool or thin pool. For
513 snapshots, the value must be a power of 2 between 4KiB and
514 512KiB and the default value is 4. For a cache pool the value
515 must be between 32KiB and 1GiB and the default value is 64. For
516 a thin pool the value must be between 64KiB and 1GiB and the de‐
517 fault value starts with 64 and scales up to fit the pool meta‐
518 data size within 128MiB, if the pool metadata size is not speci‐
519 fied. The value must be a multiple of 64KiB. See lvmthin(7)
520 and lvmcache(7) for more information.
521 --commandprofile String
523 The command profile to use for command configuration. See
524 lvm.conf(5) for more information about profiles.
525 --compression y|n
527 Controls whether compression is enabled or disable for VDO vol‐
528 ume. See lvmvdo(7) for more information about VDO usage.
529 --config String
531 Config settings for the command. These override lvm.conf set‐
532 tings. The String arg uses the same format as lvm.conf, or may
533 use section/field syntax. See lvm.conf(5) for more information
534 about config.
535 -C|--contiguous y|n
537 Sets or resets the contiguous allocation policy for LVs. De‐
538 fault is no contiguous allocation based on a next free princi‐
539 ple. It is only possible to change a non-contiguous allocation
540 policy to contiguous if all of the allocated physical extents in
541 the LV are already contiguous.
542 -d|--debug ...
544 Set debug level. Repeat from 1 to 6 times to increase the detail
545 of messages sent to the log file and/or syslog (if configured).
546 --deduplication y|n
548 Controls whether deduplication is enabled or disable for VDO
549 volume. See lvmvdo(7) for more information about VDO usage.
550 --discards passdown|nopassdown|ignore
552 Specifies how the device-mapper thin pool layer in the kernel
553 should handle discards. ignore causes the thin pool to ignore
554 discards. nopassdown causes the thin pool to process discards
555 itself to allow reuse of unneeded extents in the thin pool.
556 passdown causes the thin pool to process discards itself (like
557 nopassdown) and pass the discards to the underlying device. See
558 lvmthin(7) for more information.
559 --driverloaded y|n
561 If set to no, the command will not attempt to use device-mapper.
562 For testing and debugging.
563 --errorwhenfull y|n
565 Specifies thin pool behavior when data space is exhausted. When
566 yes, device-mapper will immediately return an error when a thin
567 pool is full and an I/O request requires space. When no, de‐
568 vice-mapper will queue these I/O requests for a period of time
569 to allow the thin pool to be extended. Errors are returned if
570 no space is available after the timeout. (Also see dm-thin-pool
571 kernel module option no_space_timeout.) See lvmthin(7) for more
572 information.
573 -l|--extents Number[PERCENT]
575 Specifies the size of the new LV in logical extents. The --size
576 and --extents options are alternate methods of specifying size.
577 The total number of physical extents used will be greater when
578 redundant data is needed for RAID levels. An alternate syntax
579 allows the size to be determined indirectly as a percentage of
580 the size of a related VG, LV, or set of PVs. The suffix %VG de‐
581 notes the total size of the VG, the suffix %FREE the remaining
582 free space in the VG, and the suffix %PVS the free space in the
583 specified PVs. For a snapshot, the size can be expressed as a
584 percentage of the total size of the origin LV with the suffix
585 %ORIGIN (100%ORIGIN provides space for the whole origin). When
586 expressed as a percentage, the size defines an upper limit for
587 the number of logical extents in the new LV. The precise number
588 of logical extents in the new LV is not determined until the
589 command has completed.
590 -h|--help
592 Display help text.
593 -K|--ignoreactivationskip
595 Ignore the "activation skip" LV flag during activation to allow
596 LVs with the flag set to be activated.
597 --ignoremonitoring
599 Do not interact with dmeventd unless --monitor is specified. Do
600 not use this if dmeventd is already monitoring a device.
601 --lockopt String
603 Used to pass options for special cases to lvmlockd. See lvm‐
604 lockd(8) for more information.
605 --longhelp
607 Display long help text.
608 -j|--major Number
610 Sets the major number of an LV block device.
611 --[raid]maxrecoveryrate Size[k|UNIT]
613 Sets the maximum recovery rate for a RAID LV. The rate value is
614 an amount of data per second for each device in the array. Set‐
615 ting the rate to 0 means it will be unbounded. See lvmraid(7)
616 for more information.
617 --metadataprofile String
619 The metadata profile to use for command configuration. See
620 lvm.conf(5) for more information about profiles.
621 --minor Number
623 Sets the minor number of an LV block device.
624 --[raid]minrecoveryrate Size[k|UNIT]
626 Sets the minimum recovery rate for a RAID LV. The rate value is
627 an amount of data per second for each device in the array. Set‐
628 ting the rate to 0 means it will be unbounded. See lvmraid(7)
629 for more information.
630 --mirrorlog core|disk
632 Specifies the type of mirror log for LVs with the "mirror" type
633 (does not apply to the "raid1" type.) disk is a persistent log
634 and requires a small amount of storage space, usually on a sepa‐
635 rate device from the data being mirrored. core is not persis‐
636 tent; the log is kept only in memory. In this case, the mirror
637 must be synchronized (by copying LV data from the first device
638 to others) each time the LV is activated, e.g. after reboot.
639 mirrored is a persistent log that is itself mirrored, but should
640 be avoided. Instead, use the raid1 type for log redundancy.
641 -m|--mirrors Number
643 Specifies the number of mirror images in addition to the origi‐
644 nal LV image, e.g. --mirrors 1 means there are two images of the
645 data, the original and one mirror image. Optional positional PV
646 args on the command line can specify the devices the images
647 should be placed on. There are two mirroring implementations:
648 "raid1" and "mirror". These are the names of the corresponding
649 LV types, or "segment types". Use the --type option to specify
650 which to use (raid1 is default, and mirror is legacy) Use
651 lvm.conf global/mirror_segtype_default and global/raid10_seg‐
652 type_default to configure the default types. See the --nosync
653 option for avoiding initial image synchronization. See lvm‐
654 raid(7) for more information.
655 --monitor y|n
657 Start (yes) or stop (no) monitoring an LV with dmeventd.
658 dmeventd monitors kernel events for an LV, and performs auto‐
659 mated maintenance for the LV in reponse to specific events. See
660 dmeventd(8) for more information.
661 -n|--name String
663 Specifies the name of a new LV. When unspecified, a default
664 name of "lvol#" is generated, where # is a number generated by
665 LVM.
666 --nolocking
668 Disable locking.
669 --nosync
671 Causes the creation of mirror, raid1, raid4, raid5 and raid10 to
672 skip the initial synchronization. In case of mirror, raid1 and
673 raid10, any data written afterwards will be mirrored, but the
674 original contents will not be copied. In case of raid4 and
675 raid5, no parity blocks will be written, though any data written
676 afterwards will cause parity blocks to be stored. This is use‐
677 ful for skipping a potentially long and resource intensive ini‐
678 tial sync of an empty mirror/raid1/raid4/raid5 and raid10 LV.
679 This option is not valid for raid6, because raid6 relies on
680 proper parity (P and Q Syndromes) being created during initial
681 synchronization in order to reconstruct proper user date in case
682 of device failures. raid0 and raid0_meta do not provide any
683 data copies or parity support and thus do not support initial
684 synchronization.
685 --noudevsync
687 Disables udev synchronisation. The process will not wait for no‐
688 tification from udev. It will continue irrespective of any pos‐
689 sible udev processing in the background. Only use this if udev
690 is not running or has rules that ignore the devices LVM creates.
691 -p|--permission rw|r
693 Set access permission to read only r or read and write rw.
694 -M|--persistent y|n
696 When yes, makes the specified minor number persistent.
697 --poolmetadatasize Size[m|UNIT]
699 Specifies the size of the new pool metadata LV.
700 --poolmetadataspare y|n
702 Enable or disable the automatic creation and management of a
703 spare pool metadata LV in the VG. A spare metadata LV is re‐
704 served space that can be used when repairing a pool.
705 --profile String
707 An alias for --commandprofile or --metadataprofile, depending on
708 the command.
709 -q|--quiet ...
711 Suppress output and log messages. Overrides --debug and --ver‐
712 bose. Repeat once to also suppress any prompts with answer
713 'no'.
714 --raidintegrity y|n
716 Enable or disable data integrity checksums for raid images.
717 --raidintegrityblocksize Number
719 The block size to use for dm-integrity on raid images. The in‐
720 tegrity block size should usually match the device logical block
721 size, or the file system block size. It may be less than the
722 file system block size, but not less than the device logical
723 block size. Possible values: 512, 1024, 2048, 4096.
724 --raidintegritymode String
726 Use a journal (default) or bitmap for keeping integrity check‐
727 sums consistent in case of a crash. The bitmap areas are recal‐
728 culated after a crash, so corruption in those areas would not be
729 detected. A journal does not have this problem. The journal
730 mode doubles writes to storage, but can improve performance for
731 scattered writes packed into a single journal write. bitmap
732 mode can in theory achieve full write throughput of the device,
733 but would not benefit from the potential scattered write opti‐
734 mization.
735 -r|--readahead auto|none|Number
737 Sets read ahead sector count of an LV. auto is the default
738 which allows the kernel to choose a suitable value automati‐
739 cally. none is equivalent to zero.
740 -R|--regionsize Size[m|UNIT]
742 Size of each raid or mirror synchronization region. lvm.conf
743 activation/raid_region_size can be used to configure a default.
744 --reportformat basic|json
746 Overrides current output format for reports which is defined
747 globally by the report/output_format setting in lvm.conf. basic
748 is the original format with columns and rows. If there is more
749 than one report per command, each report is prefixed with the
750 report name for identification. json produces report output in
751 JSON format. See lvmreport(7) for more information.
752 -k|--setactivationskip y|n
754 Persistently sets (yes) or clears (no) the "activation skip"
755 flag on an LV. An LV with this flag set is not activated unless
756 the --ignoreactivationskip option is used by the activation com‐
757 mand. This flag is set by default on new thin snapshot LVs.
758 The flag is not applied to deactivation. The current value of
759 the flag is indicated in the lvs lv_attr bits.
760 -L|--size Size[m|UNIT]
762 Specifies the size of the new LV. The --size and --extents op‐
763 tions are alternate methods of specifying size. The total num‐
764 ber of physical extents used will be greater when redundant data
765 is needed for RAID levels.
766 -s|--snapshot
768 Create a snapshot. Snapshots provide a "frozen image" of an ori‐
769 gin LV. The snapshot LV can be used, e.g. for backups, while
770 the origin LV continues to be used. This option can create a
771 COW (copy on write) snapshot, or a thin snapshot (in a thin
772 pool.) Thin snapshots are created when the origin is a thin LV
773 and the size option is NOT specified. Thin snapshots share the
774 same blocks in the thin pool, and do not allocate new space from
775 the VG. Thin snapshots are created with the "activation skip"
776 flag, see --setactivationskip. A thin snapshot of a non-thin
777 "external origin" LV is created when a thin pool is specified.
778 Unprovisioned blocks in the thin snapshot LV are read from the
779 external origin LV. The external origin LV must be read-only.
780 See lvmthin(7) for more information about LVM thin provisioning.
781 COW snapshots are created when a size is specified. The size is
782 allocated from space in the VG, and is the amount of space that
783 can be used for saving COW blocks as writes occur to the origin
784 or snapshot. The size chosen should depend upon the amount of
785 writes that are expected; often 20% of the origin LV is enough.
786 If COW space runs low, it can be extended with lvextend (shrink‐
787 ing is also allowed with lvreduce.) A small amount of the COW
788 snapshot LV size is used to track COW block locations, so the
789 full size is not available for COW data blocks. Use lvs to
790 check how much space is used, and see --monitor to to automati‐
791 cally extend the size to avoid running out of space.
792 -i|--stripes Number
794 Specifies the number of stripes in a striped LV. This is the
795 number of PVs (devices) that a striped LV is spread across. Data
796 that appears sequential in the LV is spread across multiple de‐
797 vices in units of the stripe size (see --stripesize). This does
798 not change existing allocated space, but only applies to space
799 being allocated by the command. When creating a RAID 4/5/6 LV,
800 this number does not include the extra devices that are required
801 for parity. The largest number depends on the RAID type (raid0:
802 64, raid10: 32, raid4/5: 63, raid6: 62), and when unspecified,
803 the default depends on the RAID type (raid0: 2, raid10: 2,
804 raid4/5: 3, raid6: 5.) To stripe a new raid LV across all PVs
805 by default, see lvm.conf allocation/raid_stripe_all_devices.
806 -I|--stripesize Size[k|UNIT]
808 The amount of data that is written to one device before moving
809 to the next in a striped LV.
810 -t|--test
812 Run in test mode. Commands will not update metadata. This is
813 implemented by disabling all metadata writing but nevertheless
814 returning success to the calling function. This may lead to un‐
815 usual error messages in multi-stage operations if a tool relies
816 on reading back metadata it believes has changed but hasn't.
817 -T|--thin
819 Specifies the command is handling a thin LV or thin pool. See
820 --type thin, --type thin-pool, and --virtualsize. See
821 lvmthin(7) for more information about LVM thin provisioning.
822 --thinpool LV
824 The name of a thin pool LV.
825 --type linear|striped|snapshot|mir‐
827 ror|raid|thin|cache|vdo|thin-pool|cache-pool|vdo-pool
828 The LV type, also known as "segment type" or "segtype". See us‐
829 age descriptions for the specific ways to use these types. For
830 more information about redundancy and performance (raid<N>, mir‐
831 ror, striped, linear) see lvmraid(7). For thin provisioning
832 (thin, thin-pool) see lvmthin(7). For performance caching
833 (cache, cache-pool) see lvmcache(7). For copy-on-write snap‐
834 shots (snapshot) see usage definitions. For VDO (vdo) see
835 lvmvdo(7). Several commands omit an explicit type option be‐
836 cause the type is inferred from other options or shortcuts (e.g.
837 --stripes, --mirrors, --snapshot, --virtualsize, --thin,
838 --cache, --vdo). Use inferred types with care because it can
839 lead to unexpected results.
840 --vdo
842 Specifies the command is handling VDO LV. See --type vdo. See
843 lvmvdo(7) for more information about VDO usage.
844 --vdopool LV
846 The name of a VDO pool LV. See lvmvdo(7) for more information
847 about VDO usage.
848 -v|--verbose ...
850 Set verbose level. Repeat from 1 to 4 times to increase the de‐
851 tail of messages sent to stdout and stderr.
852 --version
854 Display version information.
855 -V|--virtualsize Size[m|UNIT]
857 The virtual size of a new thin LV. See lvmthin(7) for more in‐
858 formation about LVM thin provisioning. Using virtual size (-V)
859 and actual size (-L) together creates a sparse LV. lvm.conf
860 global/sparse_segtype_default determines the default segment
861 type used to create a sparse LV. Anything written to a sparse
862 LV will be returned when reading from it. Reading from other
863 areas of the LV will return blocks of zeros. When using a snap‐
864 shot to create a sparse LV, a hidden virtual device is created
865 using the zero target, and the LV has the suffix _vorigin.
866 Snapshots are less efficient than thin provisioning when creat‐
867 ing large sparse LVs (GiB).
868 -W|--wipesignatures y|n
870 Controls detection and subsequent wiping of signatures on new
871 LVs. There is a prompt for each signature detected to confirm
872 its wiping (unless --yes is used to override confirmations.)
873 When not specified, signatures are wiped whenever zeroing is
874 done (see --zero). This behaviour can be configured with
875 lvm.conf allocation/wipe_signatures_when_zeroing_new_lvs. If
876 blkid wiping is used (lvm.conf allocation/use_blkid_wiping) and
877 LVM is compiled with blkid wiping support, then the blkid(8) li‐
878 brary is used to detect the signatures (use blkid -k to list the
879 signatures that are recognized). Otherwise, native LVM code is
880 used to detect signatures (only MD RAID, swap and LUKS signa‐
881 tures are detected in this case.) The LV is not wiped if the
882 read only flag is set.
883 -y|--yes
885 Do not prompt for confirmation interactively but always assume
886 the answer yes. Use with extreme caution. (For automatic no,
887 see -qq.)
888 -Z|--zero y|n
890 Controls zeroing of the first 4KiB of data in the new LV. De‐
891 fault is y. Snapshot COW volumes are always zeroed. For thin
892 pools, this controls zeroing of provisioned blocks. LV is not
893 zeroed if the read only flag is set. Warning: trying to mount
894 an unzeroed LV can cause the system to hang.
895
897 VG
898 Volume Group name. See lvm(8) for valid names. For lvcreate,
899 the required VG positional arg may be omitted when the VG name
900 is included in another option, e.g. --name VG/LV.
901 LV
903 Logical Volume name. See lvm(8) for valid names. An LV posi‐
904 tional arg generally includes the VG name and LV name, e.g.
905 VG/LV. LV followed by _<type> indicates that an LV of the given
906 type is required. (raid represents raid<N> type)
907 PV
909 Physical Volume name, a device path under /dev. For commands
910 managing physical extents, a PV positional arg generally accepts
911 a suffix indicating a range (or multiple ranges) of physical ex‐
912 tents (PEs). When the first PE is omitted, it defaults to the
913 start of the device, and when the last PE is omitted it defaults
914 to end. Start and end range (inclusive): PV[:PE-PE]... Start
915 and length range (counting from 0): PV[:PE+PE]...
916 String
918 See the option description for information about the string con‐
919 tent.
920 Size[UNIT]
922 Size is an input number that accepts an optional unit. Input
923 units are always treated as base two values, regardless of capi‐
924 talization, e.g. 'k' and 'K' both refer to 1024. The default
925 input unit is specified by letter, followed by |UNIT. UNIT rep‐
926 resents other possible input units: bBsSkKmMgGtTpPeE. b|B is
927 bytes, s|S is sectors of 512 bytes, k|K is KiB, m|M is MiB, g|G
928 is GiB, t|T is TiB, p|P is PiB, e|E is EiB. (This should not be
929 confused with the output control --units, where capital letters
930 mean multiple of 1000.)
931
933 See lvm(8) for information about environment variables used by lvm.
934 For example, LVM_VG_NAME can generally be substituted for a required VG
935 parameter.
936
938 Alternate command forms, advanced command usage, and listing of all
939 valid syntax for completeness.
940 Create an LV that returns errors when used.
942 lvcreate --type error -L|--size Size[m|UNIT] VG
944 [ -l|--extents Number[PERCENT] ]
945 [ COMMON_OPTIONS ]
946 -
947 Create an LV that returns zeros when read.
949 lvcreate --type zero -L|--size Size[m|UNIT] VG
951 [ -l|--extents Number[PERCENT] ]
952 [ COMMON_OPTIONS ]
953 -
954 Create a linear LV.
956 lvcreate --type linear -L|--size Size[m|UNIT] VG
958 [ -l|--extents Number[PERCENT] ]
959 [ COMMON_OPTIONS ]
960 [ PV ... ]
961 -
962 Create a striped LV (also see lvcreate --stripes).
964 lvcreate --type striped -L|--size Size[m|UNIT] VG
966 [ -l|--extents Number[PERCENT] ]
967 [ -i|--stripes Number ]
968 [ -I|--stripesize Size[k|UNIT] ]
969 [ COMMON_OPTIONS ]
970 [ PV ... ]
971 -
972 Create a mirror LV (also see --type raid1).
974 lvcreate --type mirror -L|--size Size[m|UNIT] VG
976 [ -l|--extents Number[PERCENT] ]
977 [ -m|--mirrors Number ]
978 [ -R|--regionsize Size[m|UNIT] ]
979 [ -i|--stripes Number ]
980 [ -I|--stripesize Size[k|UNIT] ]
981 [ --mirrorlog core|disk ]
982 [ COMMON_OPTIONS ]
983 [ PV ... ]
984 -
985 Create a COW snapshot LV of an origin LV
987 (also see --snapshot).
988 lvcreate --type snapshot -L|--size Size[m|UNIT] LV
990 [ -l|--extents Number[PERCENT] ]
991 [ -s|--snapshot ]
992 [ -i|--stripes Number ]
993 [ -I|--stripesize Size[k|UNIT] ]
994 [ -c|--chunksize Size[k|UNIT] ]
995 [ COMMON_OPTIONS ]
996 [ PV ... ]
997 -
998 Create a sparse COW snapshot LV of a virtual origin LV
1000 (also see --snapshot).
1001 lvcreate --type snapshot -L|--size Size[m|UNIT]
1003 -V|--virtualsize Size[m|UNIT] VG
1004 [ -l|--extents Number[PERCENT] ]
1005 [ -s|--snapshot ]
1006 [ -c|--chunksize Size[k|UNIT] ]
1007 [ COMMON_OPTIONS ]
1008 [ PV ... ]
1009 -
1010 Create a sparse COW snapshot LV of a virtual origin LV.
1012 lvcreate -s|--snapshot -L|--size Size[m|UNIT]
1014 -V|--virtualsize Size[m|UNIT] VG
1015 [ -l|--extents Number[PERCENT] ]
1016 [ -c|--chunksize Size[k|UNIT] ]
1017 [ --type snapshot ]
1018 [ COMMON_OPTIONS ]
1019 [ PV ... ]
1020 -
1021 Create a thin pool (infers --type thin-pool).
1023 lvcreate -T|--thin -L|--size Size[m|UNIT] VG
1025 [ -l|--extents Number[PERCENT] ]
1026 [ -c|--chunksize Size[k|UNIT] ]
1027 [ -i|--stripes Number ]
1028 [ -I|--stripesize Size[k|UNIT] ]
1029 [ --type thin-pool ]
1030 [ --poolmetadatasize Size[m|UNIT] ]
1031 [ --poolmetadataspare y|n ]
1032 [ --discards passdown|nopassdown|ignore ]
1033 [ --errorwhenfull y|n ]
1034 [ COMMON_OPTIONS ]
1035 [ PV ... ]
1036 -
1037 Create a thin pool named by the --thinpool arg
1039 (infers --type thin-pool).
1040 lvcreate -L|--size Size[m|UNIT] --thinpool LV_new VG
1042 [ -l|--extents Number[PERCENT] ]
1043 [ -T|--thin ]
1044 [ -c|--chunksize Size[k|UNIT] ]
1045 [ -i|--stripes Number ]
1046 [ -I|--stripesize Size[k|UNIT] ]
1047 [ --type thin-pool ]
1048 [ --poolmetadatasize Size[m|UNIT] ]
1049 [ --poolmetadataspare y|n ]
1050 [ --discards passdown|nopassdown|ignore ]
1051 [ --errorwhenfull y|n ]
1052 [ COMMON_OPTIONS ]
1053 [ PV ... ]
1054 -
1055 Create a cache pool named by the --cachepool arg
1057 (variant, uses --cachepool in place of --name).
1058 lvcreate --type cache-pool -L|--size Size[m|UNIT]
1060 --cachepool LV_new VG
1061 [ -l|--extents Number[PERCENT] ]
1062 [ -H|--cache ]
1063 [ -c|--chunksize Size[k|UNIT] ]
1064 [ --poolmetadatasize Size[m|UNIT] ]
1065 [ --poolmetadataspare y|n ]
1066 [ --cachemode writethrough|writeback|passthrough ]
1067 [ --cachepolicy String ]
1068 [ --cachesettings String ]
1069 [ --cachemetadataformat auto|1|2 ]
1070 [ COMMON_OPTIONS ]
1071 [ PV ... ]
1072 -
1073 Create a thin LV in a thin pool.
1075 lvcreate --type thin -V|--virtualsize Size[m|UNIT]
1077 --thinpool LV_thinpool VG
1078 [ -T|--thin ]
1079 [ -c|--chunksize Size[k|UNIT] ]
1080 [ --poolmetadatasize Size[m|UNIT] ]
1081 [ --poolmetadataspare y|n ]
1082 [ --discards passdown|nopassdown|ignore ]
1083 [ --errorwhenfull y|n ]
1084 [ COMMON_OPTIONS ]
1085 -
1086 Create a thin LV in a thin pool named in the first arg
1088 (variant, also see --thinpool for naming pool).
1089 lvcreate --type thin -V|--virtualsize Size[m|UNIT] LV_thinpool
1091 [ -T|--thin ]
1092 [ --discards passdown|nopassdown|ignore ]
1093 [ --errorwhenfull y|n ]
1094 [ COMMON_OPTIONS ]
1095 -
1096 Create a thin LV in the thin pool named in the first arg
1098 (variant, infers --type thin, also see --thinpool for
1099 naming pool.)
1100 lvcreate -V|--virtualsize Size[m|UNIT] LV_thinpool
1102 [ -T|--thin ]
1103 [ --type thin ]
1104 [ --discards passdown|nopassdown|ignore ]
1105 [ --errorwhenfull y|n ]
1106 [ COMMON_OPTIONS ]
1107 -
1108 Create a thin LV that is a snapshot of an existing thin LV.
1110 lvcreate --type thin LV_thin
1112 [ -T|--thin ]
1113 [ --discards passdown|nopassdown|ignore ]
1114 [ --errorwhenfull y|n ]
1115 [ COMMON_OPTIONS ]
1116 -
1117 Create a thin LV that is a snapshot of an existing thin LV
1119 (infers --type thin).
1120 lvcreate -T|--thin LV_thin
1122 [ --type thin ]
1123 [ --discards passdown|nopassdown|ignore ]
1124 [ --errorwhenfull y|n ]
1125 [ COMMON_OPTIONS ]
1126 -
1127 Create a thin LV that is a snapshot of an external origin LV
1129 (infers --type thin).
1130 lvcreate -s|--snapshot --thinpool LV_thinpool LV
1132 [ --type thin ]
1133 [ --discards passdown|nopassdown|ignore ]
1134 [ --errorwhenfull y|n ]
1135 [ COMMON_OPTIONS ]
1136 -
1137 Create a VDO LV with VDO pool.
1139 lvcreate --vdo -L|--size Size[m|UNIT] VG
1141 [ -l|--extents Number[PERCENT] ]
1142 [ -V|--virtualsize Size[m|UNIT] ]
1143 [ -i|--stripes Number ]
1144 [ -I|--stripesize Size[k|UNIT] ]
1145 [ --vdopool LV_new ]
1146 [ --compression y|n ]
1147 [ --deduplication y|n ]
1148 [ COMMON_OPTIONS ]
1149 [ PV ... ]
1150 -
1151 Create a VDO LV with VDO pool.
1153 lvcreate --vdopool LV_new -L|--size Size[m|UNIT] VG
1155 [ -l|--extents Number[PERCENT] ]
1156 [ -V|--virtualsize Size[m|UNIT] ]
1157 [ -i|--stripes Number ]
1158 [ -I|--stripesize Size[k|UNIT] ]
1159 [ --vdo ]
1160 [ --type vdo ]
1161 [ --compression y|n ]
1162 [ --deduplication y|n ]
1163 [ COMMON_OPTIONS ]
1164 [ PV ... ]
1165 -
1166 Create a thin LV, first creating a thin pool for it,
1168 where the new thin pool is named by the --thinpool arg
1169 (variant, infers --type thin).
1170 lvcreate -V|--virtualsize Size[m|UNIT] -L|--size Size[m|UNIT]
1172 --thinpool LV_new
1173 [ -l|--extents Number[PERCENT] ]
1174 [ -T|--thin ]
1175 [ -c|--chunksize Size[k|UNIT] ]
1176 [ -i|--stripes Number ]
1177 [ -I|--stripesize Size[k|UNIT] ]
1178 [ --poolmetadatasize Size[m|UNIT] ]
1179 [ --poolmetadataspare y|n ]
1180 [ --discards passdown|nopassdown|ignore ]
1181 [ --errorwhenfull y|n ]
1182 [ COMMON_OPTIONS ]
1183 [ PV ... ]
1184 -
1185 Create a thin LV, first creating a thin pool for it,
1187 where the new thin pool is named by the --thinpool arg
1188 (variant, infers --type thin).
1189 lvcreate -V|--virtualsize Size[m|UNIT] -L|--size Size[m|UNIT]
1191 --thinpool LV_new VG
1192 [ -l|--extents Number[PERCENT] ]
1193 [ -T|--thin ]
1194 [ -c|--chunksize Size[k|UNIT] ]
1195 [ -i|--stripes Number ]
1196 [ -I|--stripesize Size[k|UNIT] ]
1197 [ --poolmetadatasize Size[m|UNIT] ]
1198 [ --poolmetadataspare y|n ]
1199 [ --discards passdown|nopassdown|ignore ]
1200 [ --errorwhenfull y|n ]
1201 [ COMMON_OPTIONS ]
1202 [ PV ... ]
1203 -
1204 Create a thin LV, first creating a thin pool for it,
1206 where the new thin pool is named in the first arg,
1207 or the new thin pool name is generated when the first
1208 arg is a VG name.
1209 lvcreate --type thin -V|--virtualsize Size[m|UNIT]
1211 -L|--size Size[m|UNIT] VG|LV_new
1212 [ -l|--extents Number[PERCENT] ]
1213 [ -T|--thin ]
1214 [ -c|--chunksize Size[k|UNIT] ]
1215 [ -i|--stripes Number ]
1216 [ -I|--stripesize Size[k|UNIT] ]
1217 [ --poolmetadatasize Size[m|UNIT] ]
1218 [ --poolmetadataspare y|n ]
1219 [ --discards passdown|nopassdown|ignore ]
1220 [ --errorwhenfull y|n ]
1221 [ COMMON_OPTIONS ]
1222 [ PV ... ]
1223 -
1224 Create a thin LV, first creating a thin pool for it,
1226 where the new thin pool is named in the first arg,
1227 or the new thin pool name is generated when the first
1228 arg is a VG name (variant, infers --type thin).
1229 lvcreate -T|--thin -V|--virtualsize Size[m|UNIT]
1231 -L|--size Size[m|UNIT] VG|LV_new
1232 [ -l|--extents Number[PERCENT] ]
1233 [ -c|--chunksize Size[k|UNIT] ]
1234 [ -i|--stripes Number ]
1235 [ -I|--stripesize Size[k|UNIT] ]
1236 [ --poolmetadatasize Size[m|UNIT] ]
1237 [ --poolmetadataspare y|n ]
1238 [ --discards passdown|nopassdown|ignore ]
1239 [ --errorwhenfull y|n ]
1240 [ COMMON_OPTIONS ]
1241 [ PV ... ]
1242 -
1243 Create a thin LV, first creating a thin pool for it
1245 (infers --type thin).
1246 Create a sparse snapshot of a virtual origin LV
1247 (infers --type snapshot).
1248 Chooses --type thin or --type snapshot according to
1249 config setting sparse_segtype_default.
1250 lvcreate -L|--size Size[m|UNIT] -V|--virtualsize Size[m|UNIT] VG
1252 [ -l|--extents Number[PERCENT] ]
1253 [ -s|--snapshot ]
1254 [ -c|--chunksize Size[k|UNIT] ]
1255 [ -i|--stripes Number ]
1256 [ -I|--stripesize Size[k|UNIT] ]
1257 [ --type snapshot ]
1258 [ --poolmetadatasize Size[m|UNIT] ]
1259 [ --poolmetadataspare y|n ]
1260 [ --discards passdown|nopassdown|ignore ]
1261 [ --errorwhenfull y|n ]
1262 [ COMMON_OPTIONS ]
1263 [ PV ... ]
1264 -
1265 Create a new LV, then attach the specified cachepool
1267 which converts the new LV to type cache
1268 (variant, infers --type cache.)
1269 lvcreate -L|--size Size[m|UNIT] --cachepool LV_cachepool VG
1271 [ -l|--extents Number[PERCENT] ]
1272 [ -H|--cache ]
1273 [ -c|--chunksize Size[k|UNIT] ]
1274 [ -i|--stripes Number ]
1275 [ -I|--stripesize Size[k|UNIT] ]
1276 [ --type cache ]
1277 [ --cachemode writethrough|writeback|passthrough ]
1278 [ --cachepolicy String ]
1279 [ --cachesettings String ]
1280 [ --cachemetadataformat auto|1|2 ]
1281 [ COMMON_OPTIONS ]
1282 [ PV ... ]
1283 -
1284 Create a new LV, then attach the specified cachepool
1286 which converts the new LV to type cache.
1287 (variant, also use --cachepool).
1288 lvcreate --type cache -L|--size Size[m|UNIT] LV_cachepool
1290 [ -l|--extents Number[PERCENT] ]
1291 [ -H|--cache ]
1292 [ -c|--chunksize Size[k|UNIT] ]
1293 [ -i|--stripes Number ]
1294 [ -I|--stripesize Size[k|UNIT] ]
1295 [ --poolmetadatasize Size[m|UNIT] ]
1296 [ --poolmetadataspare y|n ]
1297 [ --cachemode writethrough|writeback|passthrough ]
1298 [ --cachepolicy String ]
1299 [ --cachesettings String ]
1300 [ --cachemetadataformat auto|1|2 ]
1301 [ COMMON_OPTIONS ]
1302 [ PV ... ]
1303 -
1304 When the LV arg is a cachepool, then create a new LV and
1306 attach the cachepool arg to it.
1307 (variant, use --type cache and --cachepool.)
1308 When the LV arg is not a cachepool, then create a new cachepool
1309 and attach it to the LV arg (alternative, use lvconvert.)
1310 lvcreate -H|--cache -L|--size Size[m|UNIT] LV
1312 [ -l|--extents Number[PERCENT] ]
1313 [ -c|--chunksize Size[k|UNIT] ]
1314 [ -i|--stripes Number ]
1315 [ -I|--stripesize Size[k|UNIT] ]
1316 [ --cachemode writethrough|writeback|passthrough ]
1317 [ --cachepolicy String ]
1318 [ --cachesettings String ]
1319 [ --cachemetadataformat auto|1|2 ]
1320 [ --poolmetadatasize Size[m|UNIT] ]
1321 [ --poolmetadataspare y|n ]
1322 [ COMMON_OPTIONS ]
1323 [ PV ... ]
1324 -
1325
1328 Create a striped LV with 3 stripes, a stripe size of 8KiB and a size of
1329 100MiB. The LV name is chosen by lvcreate.
1330 lvcreate -i 3 -I 8 -L 100m vg00
1331 Create a raid1 LV with two images, and a useable size of 500 MiB. This
1333 operation requires two devices, one for each mirror image. RAID meta‐
1334 data (superblock and bitmap) is also included on the two devices.
1335 lvcreate --type raid1 -m1 -L 500m -n mylv vg00
1336 Create a mirror LV with two images, and a useable size of 500 MiB.
1338 This operation requires three devices: two for mirror images and one
1339 for a disk log.
1340 lvcreate --type mirror -m1 -L 500m -n mylv vg00
1341 Create a mirror LV with 2 images, and a useable size of 500 MiB. This
1343 operation requires 2 devices because the log is in memory.
1344 lvcreate --type mirror -m1 --mirrorlog core -L 500m -n mylv vg00
1345 Create a copy-on-write snapshot of an LV:
1347 lvcreate --snapshot --size 100m --name mysnap vg00/mylv
1348 Create a copy-on-write snapshot with a size sufficient for overwriting
1350 20% of the size of the original LV.
1351 lvcreate -s -l 20%ORIGIN -n mysnap vg00/mylv
1352 Create a sparse LV with 1TiB of virtual space, and actual space just
1354 under 100MiB.
1355 lvcreate --snapshot --virtualsize 1t --size 100m --name mylv vg00
1356 Create a linear LV with a usable size of 64MiB on specific physical ex‐
1358 tents.
1359 lvcreate -L 64m -n mylv vg00 /dev/sda:0-7 /dev/sdb:0-7
1360 Create a RAID5 LV with a usable size of 5GiB, 3 stripes, a stripe size
1362 of 64KiB, using a total of 4 devices (including one for parity).
1363 lvcreate --type raid5 -L 5G -i 3 -I 64 -n mylv vg00
1364 Create a RAID5 LV using all of the free space in the VG and spanning
1366 all the PVs in the VG (note that the command will fail if there are
1367 more than 8 PVs in the VG, in which case -i 7 must be used to get to
1368 the current maximum of 8 devices including parity for RaidLVs).
1369 lvcreate --config allocation/raid_stripe_all_devices=1
1370 --type raid5 -l 100%FREE -n mylv vg00
1371 Create RAID10 LV with a usable size of 5GiB, using 2 stripes, each on a
1373 two-image mirror. (Note that the -i and -m arguments behave differ‐
1374 ently: -i specifies the total number of stripes, but -m specifies the
1375 number of images in addition to the first image).
1376 lvcreate --type raid10 -L 5G -i 2 -m 1 -n mylv vg00
1377 Create a 1TiB thin LV mythin, with 256GiB thinpool tpool0 in vg00.
1379 lvcreate --T --size 256G --name mythin vg00/tpool0
1380 Create a 1TiB thin LV, first creating a new thin pool for it, where the
1382 thin pool has 100MiB of space, uses 2 stripes, has a 64KiB stripe size,
1383 and 256KiB chunk size.
1384 lvcreate --type thin --name mylv --thinpool mypool
1385 -V 1t -L 100m -i 2 -I 64 -c 256 vg00
1386 Create a thin snapshot of a thin LV (the size option must not be used,
1388 otherwise a copy-on-write snapshot would be created).
1389 lvcreate --snapshot --name mysnap vg00/thinvol
1390 Create a thin snapshot of the read-only inactive LV named "origin"
1392 which becomes an external origin for the thin snapshot LV.
1393 lvcreate --snapshot --name mysnap --thinpool mypool vg00/origin
1394 Create a cache pool from a fast physical device. The cache pool can
1396 then be used to cache an LV.
1397 lvcreate --type cache-pool -L 1G -n my_cpool vg00 /dev/fast1
1398 Create a cache LV, first creating a new origin LV on a slow physical
1400 device, then combining the new origin LV with an existing cache pool.
1401 lvcreate --type cache --cachepool my_cpool
1402 -L 100G -n mylv vg00 /dev/slow1
1403 Create a VDO LV vdo0 with VDOPoolLV size of 10GiB and name vpool1.
1405 lvcreate --vdo --size 10G --name vdo0 vg00/vpool1
1406
1408 lvm(8) lvm.conf(5) lvmconfig(8)
1409 pvchange(8) pvck(8) pvcreate(8) pvdisplay(8) pvmove(8) pvremove(8)
1411 pvresize(8) pvs(8) pvscan(8)
1412 vgcfgbackup(8) vgcfgrestore(8) vgchange(8) vgck(8) vgcreate(8) vgcon‐
1414 vert(8) vgdisplay(8) vgexport(8) vgextend(8) vgimport(8) vgimport‐
1415 clone(8) vgmerge(8) vgmknodes(8) vgreduce(8) vgremove(8) vgrename(8)
1416 vgs(8) vgscan(8) vgsplit(8)
1417 lvcreate(8) lvchange(8) lvconvert(8) lvdisplay(8) lvextend(8) lvre‐
1419 duce(8) lvremove(8) lvrename(8) lvresize(8) lvs(8) lvscan(8)
1420 lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8) blkdeacti‐
1422 vate(8) lvmdump(8)
1423 dmeventd(8) lvmpolld(8) lvmlockd(8) lvmlockctl(8) cmirrord(8) lvmd‐
1425 busd(8)
1426 lvmsystemid(7) lvmreport(7) lvmraid(7) lvmthin(7) lvmcache(7)
1428Red Hat, Inc. LVM TOOLS 2.03.11(2) (2021-01-08) LVCREATE(8)