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 --cachemetadataformat auto|1|2
19 --cachemode writethrough|writeback|passthrough
20 --cachepolicy String
21 --cachepool LV
22 --cachesettings String
23 -c|--chunksize Size[k|UNIT]
24 --commandprofile String
25 --config String
26 -C|--contiguous y|n
27 -d|--debug
28 --discards passdown|nopassdown|ignore
29 --driverloaded y|n
30 --errorwhenfull y|n
31 -l|--extents Number[PERCENT]
32 -h|--help
33 -K|--ignoreactivationskip
34 --ignoremonitoring
35 --lockopt String
36 --longhelp
37 -j|--major Number
38 --[raid]maxrecoveryrate Size[k|UNIT]
39 --metadataprofile String
40 --minor Number
41 --[raid]minrecoveryrate Size[k|UNIT]
42 --mirrorlog core|disk
43 -m|--mirrors Number
44 --monitor y|n
45 -n|--name String
46 --nosync
47 --noudevsync
48 -p|--permission rw|r
49 -M|--persistent y|n
50 --poolmetadatasize Size[m|UNIT]
51 --poolmetadataspare y|n
52 --profile String
53 -q|--quiet
54 -r|--readahead auto|none|Number
55 -R|--regionsize Size[m|UNIT]
56 --reportformat basic|json
57 -k|--setactivationskip y|n
58 -L|--size Size[m|UNIT]
59 -s|--snapshot
60 -i|--stripes Number
61 -I|--stripesize Size[k|UNIT]
62 -t|--test
63 -T|--thin
64 --thinpool LV
65 --type linear|striped|snapshot|mir‐
66 ror|raid|thin|cache|thin-pool|cache-pool
67 -v|--verbose
68 --version
69 -V|--virtualsize Size[m|UNIT]
70 -W|--wipesignatures y|n
71 -y|--yes
72 -Z|--zero y|n
73
75 lvcreate creates a new LV in a VG. For standard LVs, this requires
76 allocating logical extents from the VG's free physical extents. If
77 there is not enough free space, the VG can be extended with other PVs
78 (vgextend(8)), or existing LVs can be reduced or removed (lvremove(8),
79 lvreduce(8).)
80 To control which PVs a new LV will use, specify one or more PVs as
82 position args at the end of the command line. lvcreate will allocate
83 physical extents only from the specified PVs.
84 lvcreate can also create snapshots of existing LVs, e.g. for backup
86 purposes. The data in a new snapshot LV represents the content of the
87 original LV from the time the snapshot was created.
88 RAID LVs can be created by specifying an LV type when creating the LV
90 (see lvmraid(7)). Different RAID levels require different numbers of
91 unique PVs be available in the VG for allocation.
92 Thin pools (for thin provisioning) and cache pools (for caching) are
94 represented by special LVs with types thin-pool and cache-pool (see
95 lvmthin(7) and lvmcache(7)). The pool LVs are not usable as standard
96 block devices, but the LV names act as references to the pools.
97 Thin LVs are thinly provisioned from a thin pool, and are created with
99 a virtual size rather than a physical size. A cache LV is the combina‐
100 tion of a standard LV with a cache pool, used to cache active portions
101 of the LV to improve performance.
102 Usage notes
104 In the usage section below, --size Size can be replaced with --extents
105 Number. See descriptions in the options section.
106 In the usage section below, --name is omitted from the required
108 options, even though it is typically used. When the name is not speci‐
109 fied, a new LV name is generated with the "lvol" prefix and a unique
110 numeric suffix.
111
113 Create a linear LV.
114 lvcreate -L|--size Size[m|UNIT] VG
116 [ -l|--extents Number[PERCENT] ]
117 [ --type linear ]
118 [ COMMON_OPTIONS ]
119 [ PV ... ]
120 -
121 Create a striped LV (infers --type striped).
123 lvcreate -i|--stripes Number -L|--size Size[m|UNIT] VG
125 [ -l|--extents Number[PERCENT] ]
126 [ -I|--stripesize Size[k|UNIT] ]
127 [ COMMON_OPTIONS ]
128 [ PV ... ]
129 -
130 Create a raid1 or mirror LV (infers --type raid1|mirror).
132 lvcreate -m|--mirrors Number -L|--size Size[m|UNIT] VG
134 [ -l|--extents Number[PERCENT] ]
135 [ -R|--regionsize Size[m|UNIT] ]
136 [ --mirrorlog core|disk ]
137 [ --[raid]minrecoveryrate Size[k|UNIT] ]
138 [ --[raid]maxrecoveryrate Size[k|UNIT] ]
139 [ COMMON_OPTIONS ]
140 [ PV ... ]
141 -
142 Create a raid LV (a specific raid level must be used, e.g. raid1).
144 lvcreate --type raid -L|--size Size[m|UNIT] VG
146 [ -l|--extents Number[PERCENT] ]
147 [ -m|--mirrors Number ]
148 [ -i|--stripes Number ]
149 [ -I|--stripesize Size[k|UNIT] ]
150 [ -R|--regionsize Size[m|UNIT] ]
151 [ --[raid]minrecoveryrate Size[k|UNIT] ]
152 [ --[raid]maxrecoveryrate Size[k|UNIT] ]
153 [ COMMON_OPTIONS ]
154 [ PV ... ]
155 -
156 Create a raid10 LV.
158 lvcreate -m|--mirrors Number -i|--stripes Number
160 -L|--size Size[m|UNIT] VG
161 [ -l|--extents Number[PERCENT] ]
162 [ -I|--stripesize Size[k|UNIT] ]
163 [ -R|--regionsize Size[m|UNIT] ]
164 [ --[raid]minrecoveryrate Size[k|UNIT] ]
165 [ --[raid]maxrecoveryrate Size[k|UNIT] ]
166 [ COMMON_OPTIONS ]
167 [ PV ... ]
168 -
169 Create a COW snapshot LV of an origin LV.
171 lvcreate -s|--snapshot -L|--size Size[m|UNIT] LV
173 [ -l|--extents Number[PERCENT] ]
174 [ -i|--stripes Number ]
175 [ -I|--stripesize Size[k|UNIT] ]
176 [ -c|--chunksize Size[k|UNIT] ]
177 [ --type snapshot ]
178 [ COMMON_OPTIONS ]
179 [ PV ... ]
180 -
181 Create a thin pool.
183 lvcreate --type thin-pool -L|--size Size[m|UNIT] VG
185 [ -l|--extents Number[PERCENT] ]
186 [ -c|--chunksize Size[k|UNIT] ]
187 [ -i|--stripes Number ]
188 [ -I|--stripesize Size[k|UNIT] ]
189 [ --thinpool LV_new ]
190 [ --poolmetadatasize Size[m|UNIT] ]
191 [ --poolmetadataspare y|n ]
192 [ --discards passdown|nopassdown|ignore ]
193 [ --errorwhenfull y|n ]
194 [ COMMON_OPTIONS ]
195 [ PV ... ]
196 -
197 Create a cache pool.
199 lvcreate --type cache-pool -L|--size Size[m|UNIT] VG
201 [ -l|--extents Number[PERCENT] ]
202 [ -H|--cache ]
203 [ -c|--chunksize Size[k|UNIT] ]
204 [ --poolmetadatasize Size[m|UNIT] ]
205 [ --poolmetadataspare y|n ]
206 [ --cachemode writethrough|writeback|passthrough ]
207 [ --cachepolicy String ]
208 [ --cachesettings String ]
209 [ --cachemetadataformat auto|1|2 ]
210 [ COMMON_OPTIONS ]
211 [ PV ... ]
212 -
213 Create a thin LV in a thin pool (infers --type thin).
215 lvcreate -V|--virtualsize Size[m|UNIT] --thinpool LV_thinpool VG
217 [ -T|--thin ]
218 [ --type thin ]
219 [ --discards passdown|nopassdown|ignore ]
220 [ --errorwhenfull y|n ]
221 [ COMMON_OPTIONS ]
222 -
223 Create a thin LV that is a snapshot of an existing thin LV
225 (infers --type thin).
226 lvcreate -s|--snapshot LV_thin
228 [ --type thin ]
229 [ --discards passdown|nopassdown|ignore ]
230 [ --errorwhenfull y|n ]
231 [ COMMON_OPTIONS ]
232 -
233 Create a thin LV that is a snapshot of an external origin LV.
235 lvcreate --type thin --thinpool LV_thinpool LV
237 [ -T|--thin ]
238 [ -c|--chunksize Size[k|UNIT] ]
239 [ --poolmetadatasize Size[m|UNIT] ]
240 [ --poolmetadataspare y|n ]
241 [ --discards passdown|nopassdown|ignore ]
242 [ --errorwhenfull y|n ]
243 [ COMMON_OPTIONS ]
244 -
245 Create a thin LV, first creating a thin pool for it,
247 where the new thin pool is named by the --thinpool arg.
248 lvcreate --type thin -V|--virtualsize Size[m|UNIT]
250 -L|--size Size[m|UNIT] --thinpool LV_new
251 [ -l|--extents Number[PERCENT] ]
252 [ -T|--thin ]
253 [ -c|--chunksize Size[k|UNIT] ]
254 [ -i|--stripes Number ]
255 [ -I|--stripesize Size[k|UNIT] ]
256 [ --poolmetadatasize Size[m|UNIT] ]
257 [ --poolmetadataspare y|n ]
258 [ --discards passdown|nopassdown|ignore ]
259 [ --errorwhenfull y|n ]
260 [ COMMON_OPTIONS ]
261 [ PV ... ]
262 -
263 Create a cache LV, first creating a new origin LV,
265 then combining it with the existing cache pool named
266 by the --cachepool arg.
267 lvcreate --type cache -L|--size Size[m|UNIT]
269 --cachepool LV_cachepool VG
270 [ -l|--extents Number[PERCENT] ]
271 [ -H|--cache ]
272 [ -c|--chunksize Size[k|UNIT] ]
273 [ -i|--stripes Number ]
274 [ -I|--stripesize Size[k|UNIT] ]
275 [ --poolmetadatasize Size[m|UNIT] ]
276 [ --poolmetadataspare y|n ]
277 [ --cachemode writethrough|writeback|passthrough ]
278 [ --cachepolicy String ]
279 [ --cachesettings String ]
280 [ --cachemetadataformat auto|1|2 ]
281 [ COMMON_OPTIONS ]
282 [ PV ... ]
283 -
284 Common options for command:
286 [ -a|--activate y|n|ay ]
287 [ -A|--autobackup y|n ]
288 [ -C|--contiguous y|n ]
289 [ -K|--ignoreactivationskip ]
290 [ -j|--major Number ]
291 [ -n|--name String ]
292 [ -p|--permission rw|r ]
293 [ -M|--persistent y|n ]
294 [ -r|--readahead auto|none|Number ]
295 [ -k|--setactivationskip y|n ]
296 [ -W|--wipesignatures y|n ]
297 [ -Z|--zero y|n ]
298 [ --addtag Tag ]
299 [ --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
300 ]
301 [ --ignoremonitoring ]
302 [ --metadataprofile String ]
303 [ --minor Number ]
304 [ --monitor y|n ]
305 [ --nosync ]
306 [ --noudevsync ]
307 [ --reportformat basic|json ]
308 Common options for lvm:
310 [ -d|--debug ]
311 [ -h|--help ]
312 [ -q|--quiet ]
313 [ -t|--test ]
314 [ -v|--verbose ]
315 [ -y|--yes ]
316 [ --commandprofile String ]
317 [ --config String ]
318 [ --driverloaded y|n ]
319 [ --lockopt String ]
320 [ --longhelp ]
321 [ --profile String ]
322 [ --version ]
323
325 -a|--activate y|n|ay
326 Controls the active state of the new LV. y makes the LV active,
327 or available. New LVs are made active by default. n makes the
328 LV inactive, or unavailable, only when possible. In some cases,
329 creating an LV requires it to be active. For example, COW snap‐
330 shots of an active origin LV can only be created in the active
331 state (this does not apply to thin snapshots). The --zero
332 option normally requires the LV to be active. If autoactivation
333 ay is used, the LV is only activated if it matches an item in
334 lvm.conf activation/auto_activation_volume_list. ay implies
335 --zero n and --wipesignatures n. See lvmlockd(8) for more
336 information about activation options for shared VGs. See
337 clvmd(8) for more information about activation options for clus‐
338 tered VGs.
339 --addtag Tag
341 Adds a tag to a PV, VG or LV. This option can be repeated to add
342 multiple tags at once. See lvm(8) for information about tags.
343 --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
345 Determines the allocation policy when a command needs to allo‐
346 cate Physical Extents (PEs) from the VG. Each VG and LV has an
347 allocation policy which can be changed with vgchange/lvchange,
348 or overriden on the command line. normal applies common sense
349 rules such as not placing parallel stripes on the same PV.
350 inherit applies the VG policy to an LV. contiguous requires new
351 PEs be placed adjacent to existing PEs. cling places new PEs on
352 the same PV as existing PEs in the same stripe of the LV. If
353 there are sufficient PEs for an allocation, but normal does not
354 use them, anywhere will use them even if it reduces performance,
355 e.g. by placing two stripes on the same PV. Optional positional
356 PV args on the command line can also be used to limit which PVs
357 the command will use for allocation. See lvm(8) for more infor‐
358 mation about allocation.
359 -A|--autobackup y|n
361 Specifies if metadata should be backed up automatically after a
362 change. Enabling this is strongly advised! See vgcfgbackup(8)
363 for more information.
364 -H|--cache
366 Specifies the command is handling a cache LV or cache pool. See
367 --type cache and --type cache-pool. See lvmcache(7) for more
368 information about LVM caching.
369 --cachemetadataformat auto|1|2
371 Specifies the cache metadata format used by cache target.
372 --cachemode writethrough|writeback|passthrough
374 Specifies when writes to a cache LV should be considered com‐
375 plete. writeback considers a write complete as soon as it is
376 stored in the cache pool. writethough considers a write com‐
377 plete only when it has been stored in both the cache pool and on
378 the origin LV. While writethrough may be slower for writes, it
379 is more resilient if something should happen to a device associ‐
380 ated with the cache pool LV. With passthrough, all reads are
381 served from the origin LV (all reads miss the cache) and all
382 writes are forwarded to the origin LV; additionally, write hits
383 cause cache block invalidates. See lvmcache(7) for more informa‐
384 tion.
385 --cachepolicy String
387 Specifies the cache policy for a cache LV. See lvmcache(7) for
388 more information.
389 --cachepool LV
391 The name of a cache pool LV.
392 --cachesettings String
394 Specifies tunable values for a cache LV in "Key = Value" form.
395 Repeat this option to specify multiple values. (The default
396 values should usually be adequate.) The special string value
397 default switches settings back to their default kernel values
398 and removes them from the list of settings stored in LVM meta‐
399 data. See lvmcache(7) for more information.
400 -c|--chunksize Size[k|UNIT]
402 The size of chunks in a snapshot, cache pool or thin pool. For
403 snapshots, the value must be a power of 2 between 4KiB and
404 512KiB and the default value is 4. For a cache pool the value
405 must be between 32KiB and 1GiB and the default value is 64. For
406 a thin pool the value must be between 64KiB and 1GiB and the
407 default value starts with 64 and scales up to fit the pool meta‐
408 data size within 128MiB, if the pool metadata size is not speci‐
409 fied. The value must be a multiple of 64KiB. See lvmthin(7)
410 and lvmcache(7) for more information.
411 --commandprofile String
413 The command profile to use for command configuration. See
414 lvm.conf(5) for more information about profiles.
415 --config String
417 Config settings for the command. These override lvm.conf set‐
418 tings. The String arg uses the same format as lvm.conf, or may
419 use section/field syntax. See lvm.conf(5) for more information
420 about config.
421 -C|--contiguous y|n
423 Sets or resets the contiguous allocation policy for LVs.
424 Default is no contiguous allocation based on a next free princi‐
425 ple. It is only possible to change a non-contiguous allocation
426 policy to contiguous if all of the allocated physical extents in
427 the LV are already contiguous.
428 -d|--debug ...
430 Set debug level. Repeat from 1 to 6 times to increase the detail
431 of messages sent to the log file and/or syslog (if configured).
432 --discards passdown|nopassdown|ignore
434 Specifies how the device-mapper thin pool layer in the kernel
435 should handle discards. ignore causes the thin pool to ignore
436 discards. nopassdown causes the thin pool to process discards
437 itself to allow reuse of unneeded extents in the thin pool.
438 passdown causes the thin pool to process discards itself (like
439 nopassdown) and pass the discards to the underlying device. See
440 lvmthin(7) for more information.
441 --driverloaded y|n
443 If set to no, the command will not attempt to use device-mapper.
444 For testing and debugging.
445 --errorwhenfull y|n
447 Specifies thin pool behavior when data space is exhausted. When
448 yes, device-mapper will immediately return an error when a thin
449 pool is full and an I/O request requires space. When no,
450 device-mapper will queue these I/O requests for a period of time
451 to allow the thin pool to be extended. Errors are returned if
452 no space is available after the timeout. (Also see dm-thin-pool
453 kernel module option no_space_timeout.) See lvmthin(7) for more
454 information.
455 -l|--extents Number[PERCENT]
457 Specifies the size of the new LV in logical extents. The --size
458 and --extents options are alternate methods of specifying size.
459 The total number of physical extents used will be greater when
460 redundant data is needed for RAID levels. An alternate syntax
461 allows the size to be determined indirectly as a percentage of
462 the size of a related VG, LV, or set of PVs. The suffix %VG
463 denotes the total size of the VG, the suffix %FREE the remaining
464 free space in the VG, and the suffix %PVS the free space in the
465 specified PVs. For a snapshot, the size can be expressed as a
466 percentage of the total size of the origin LV with the suffix
467 %ORIGIN (100%ORIGIN provides space for the whole origin). When
468 expressed as a percentage, the size defines an upper limit for
469 the number of logical extents in the new LV. The precise number
470 of logical extents in the new LV is not determined until the
471 command has completed.
472 -h|--help
474 Display help text.
475 -K|--ignoreactivationskip
477 Ignore the "activation skip" LV flag during activation to allow
478 LVs with the flag set to be activated.
479 --ignoremonitoring
481 Do not interact with dmeventd unless --monitor is specified. Do
482 not use this if dmeventd is already monitoring a device.
483 --lockopt String
485 Used to pass options for special cases to lvmlockd. See lvm‐
486 lockd(8) for more information.
487 --longhelp
489 Display long help text.
490 -j|--major Number
492 Sets the major number of an LV block device.
493 --[raid]maxrecoveryrate Size[k|UNIT]
495 Sets the maximum recovery rate for a RAID LV. The rate value is
496 an amount of data per second for each device in the array. Set‐
497 ting the rate to 0 means it will be unbounded. See lvmraid(7)
498 for more information.
499 --metadataprofile String
501 The metadata profile to use for command configuration. See
502 lvm.conf(5) for more information about profiles.
503 --minor Number
505 Sets the minor number of an LV block device.
506 --[raid]minrecoveryrate Size[k|UNIT]
508 Sets the minimum recovery rate for a RAID LV. The rate value is
509 an amount of data per second for each device in the array. Set‐
510 ting the rate to 0 means it will be unbounded. See lvmraid(7)
511 for more information.
512 --mirrorlog core|disk
514 Specifies the type of mirror log for LVs with the "mirror" type
515 (does not apply to the "raid1" type.) disk is a persistent log
516 and requires a small amount of storage space, usually on a sepa‐
517 rate device from the data being mirrored. core is not persis‐
518 tent; the log is kept only in memory. In this case, the mirror
519 must be synchronized (by copying LV data from the first device
520 to others) each time the LV is activated, e.g. after reboot.
521 mirrored is a persistent log that is itself mirrored, but should
522 be avoided. Instead, use the raid1 type for log redundancy.
523 -m|--mirrors Number
525 Specifies the number of mirror images in addition to the origi‐
526 nal LV image, e.g. --mirrors 1 means there are two images of the
527 data, the original and one mirror image. Optional positional PV
528 args on the command line can specify the devices the images
529 should be placed on. There are two mirroring implementations:
530 "raid1" and "mirror". These are the names of the corresponding
531 LV types, or "segment types". Use the --type option to specify
532 which to use (raid1 is default, and mirror is legacy) Use
533 lvm.conf global/mirror_segtype_default and global/raid10_seg‐
534 type_default to configure the default types. See the --nosync
535 option for avoiding initial image synchronization. See lvm‐
536 raid(7) for more information.
537 --monitor y|n
539 Start (yes) or stop (no) monitoring an LV with dmeventd.
540 dmeventd monitors kernel events for an LV, and performs auto‐
541 mated maintenance for the LV in reponse to specific events. See
542 dmeventd(8) for more information.
543 -n|--name String
545 Specifies the name of a new LV. When unspecified, a default
546 name of "lvol#" is generated, where # is a number generated by
547 LVM.
548 --nosync
550 Causes the creation of mirror, raid1, raid4, raid5 and raid10 to
551 skip the initial synchronization. In case of mirror, raid1 and
552 raid10, any data written afterwards will be mirrored, but the
553 original contents will not be copied. In case of raid4 and
554 raid5, no parity blocks will be written, though any data written
555 afterwards will cause parity blocks to be stored. This is use‐
556 ful for skipping a potentially long and resource intensive ini‐
557 tial sync of an empty mirror/raid1/raid4/raid5 and raid10 LV.
558 This option is not valid for raid6, because raid6 relies on
559 proper parity (P and Q Syndromes) being created during initial
560 synchronization in order to reconstruct proper user date in case
561 of device failures. raid0 and raid0_meta do not provide any
562 data copies or parity support and thus do not support initial
563 synchronization.
564 --noudevsync
566 Disables udev synchronisation. The process will not wait for
567 notification from udev. It will continue irrespective of any
568 possible udev processing in the background. Only use this if
569 udev is not running or has rules that ignore the devices LVM
570 creates.
571 -p|--permission rw|r
573 Set access permission to read only r or read and write rw.
574 -M|--persistent y|n
576 When yes, makes the specified minor number persistent.
577 --poolmetadatasize Size[m|UNIT]
579 Specifies the size of the new pool metadata LV.
580 --poolmetadataspare y|n
582 Enable or disable the automatic creation and management of a
583 spare pool metadata LV in the VG. A spare metadata LV is
584 reserved space that can be used when repairing a pool.
585 --profile String
587 An alias for --commandprofile or --metadataprofile, depending on
588 the command.
589 -q|--quiet ...
591 Suppress output and log messages. Overrides --debug and --ver‐
592 bose. Repeat once to also suppress any prompts with answer
593 'no'.
594 -r|--readahead auto|none|Number
596 Sets read ahead sector count of an LV. auto is the default
597 which allows the kernel to choose a suitable value automati‐
598 cally. none is equivalent to zero.
599 -R|--regionsize Size[m|UNIT]
601 Size of each raid or mirror synchronization region. lvm.conf
602 activation/raid_region_size can be used to configure a default.
603 --reportformat basic|json
605 Overrides current output format for reports which is defined
606 globally by the report/output_format setting in lvm.conf. basic
607 is the original format with columns and rows. If there is more
608 than one report per command, each report is prefixed with the
609 report name for identification. json produces report output in
610 JSON format. See lvmreport(7) for more information.
611 -k|--setactivationskip y|n
613 Persistently sets (yes) or clears (no) the "activation skip"
614 flag on an LV. An LV with this flag set is not activated unless
615 the --ignoreactivationskip option is used by the activation com‐
616 mand. This flag is set by default on new thin snapshot LVs.
617 The flag is not applied to deactivation. The current value of
618 the flag is indicated in the lvs lv_attr bits.
619 -L|--size Size[m|UNIT]
621 Specifies the size of the new LV. The --size and --extents
622 options are alternate methods of specifying size. The total
623 number of physical extents used will be greater when redundant
624 data is needed for RAID levels.
625 -s|--snapshot
627 Create a snapshot. Snapshots provide a "frozen image" of an ori‐
628 gin LV. The snapshot LV can be used, e.g. for backups, while
629 the origin LV continues to be used. This option can create a
630 COW (copy on write) snapshot, or a thin snapshot (in a thin
631 pool.) Thin snapshots are created when the origin is a thin LV
632 and the size option is NOT specified. Thin snapshots share the
633 same blocks in the thin pool, and do not allocate new space from
634 the VG. Thin snapshots are created with the "activation skip"
635 flag, see --setactivationskip. A thin snapshot of a non-thin
636 "external origin" LV is created when a thin pool is specified.
637 Unprovisioned blocks in the thin snapshot LV are read from the
638 external origin LV. The external origin LV must be read-only.
639 See lvmthin(7) for more information about LVM thin provisioning.
640 COW snapshots are created when a size is specified. The size is
641 allocated from space in the VG, and is the amount of space that
642 can be used for saving COW blocks as writes occur to the origin
643 or snapshot. The size chosen should depend upon the amount of
644 writes that are expected; often 20% of the origin LV is enough.
645 If COW space runs low, it can be extended with lvextend (shrink‐
646 ing is also allowed with lvreduce.) A small amount of the COW
647 snapshot LV size is used to track COW block locations, so the
648 full size is not available for COW data blocks. Use lvs to
649 check how much space is used, and see --monitor to to automati‐
650 cally extend the size to avoid running out of space.
651 -i|--stripes Number
653 Specifies the number of stripes in a striped LV. This is the
654 number of PVs (devices) that a striped LV is spread across. Data
655 that appears sequential in the LV is spread across multiple
656 devices in units of the stripe size (see --stripesize). This
657 does not change existing allocated space, but only applies to
658 space being allocated by the command. When creating a RAID
659 4/5/6 LV, this number does not include the extra devices that
660 are required for parity. The largest number depends on the RAID
661 type (raid0: 64, raid10: 32, raid4/5: 63, raid6: 62), and when
662 unspecified, the default depends on the RAID type (raid0: 2,
663 raid10: 2, raid4/5: 3, raid6: 5.) To stripe a new raid LV
664 across all PVs by default, see lvm.conf alloca‐
665 tion/raid_stripe_all_devices.
666 -I|--stripesize Size[k|UNIT]
668 The amount of data that is written to one device before moving
669 to the next in a striped LV.
670 -t|--test
672 Run in test mode. Commands will not update metadata. This is
673 implemented by disabling all metadata writing but nevertheless
674 returning success to the calling function. This may lead to
675 unusual error messages in multi-stage operations if a tool
676 relies on reading back metadata it believes has changed but
677 hasn't.
678 -T|--thin
680 Specifies the command is handling a thin LV or thin pool. See
681 --type thin, --type thin-pool, and --virtualsize. See
682 lvmthin(7) for more information about LVM thin provisioning.
683 --thinpool LV
685 The name of a thin pool LV.
686 --type linear|striped|snapshot|mir‐
688 ror|raid|thin|cache|thin-pool|cache-pool
689 The LV type, also known as "segment type" or "segtype". See
690 usage descriptions for the specific ways to use these types.
691 For more information about redundancy and performance (raid<N>,
692 mirror, striped, linear) see lvmraid(7). For thin provisioning
693 (thin, thin-pool) see lvmthin(7). For performance caching
694 (cache, cache-pool) see lvmcache(7). For copy-on-write snap‐
695 shots (snapshot) see usage definitions. Several commands omit
696 an explicit type option because the type is inferred from other
697 options or shortcuts (e.g. --stripes, --mirrors, --snapshot,
698 --virtualsize, --thin, --cache). Use inferred types with care
699 because it can lead to unexpected results.
700 -v|--verbose ...
702 Set verbose level. Repeat from 1 to 4 times to increase the
703 detail of messages sent to stdout and stderr.
704 --version
706 Display version information.
707 -V|--virtualsize Size[m|UNIT]
709 The virtual size of a new thin LV. See lvmthin(7) for more
710 information about LVM thin provisioning. Using virtual size
711 (-V) and actual size (-L) together creates a sparse LV.
712 lvm.conf global/sparse_segtype_default determines the default
713 segment type used to create a sparse LV. Anything written to a
714 sparse LV will be returned when reading from it. Reading from
715 other areas of the LV will return blocks of zeros. When using a
716 snapshot to create a sparse LV, a hidden virtual device is cre‐
717 ated using the zero target, and the LV has the suffix _vorigin.
718 Snapshots are less efficient than thin provisioning when creat‐
719 ing large sparse LVs (GiB).
720 -W|--wipesignatures y|n
722 Controls detection and subsequent wiping of signatures on new
723 LVs. There is a prompt for each signature detected to confirm
724 its wiping (unless --yes is used to override confirmations.)
725 When not specified, signatures are wiped whenever zeroing is
726 done (see --zero). This behaviour can be configured with
727 lvm.conf allocation/wipe_signatures_when_zeroing_new_lvs. If
728 blkid wiping is used (lvm.conf allocation/use_blkid_wiping) and
729 LVM is compiled with blkid wiping support, then the blkid(8)
730 library is used to detect the signatures (use blkid -k to list
731 the signatures that are recognized). Otherwise, native LVM code
732 is used to detect signatures (only MD RAID, swap and LUKS signa‐
733 tures are detected in this case.) The LV is not wiped if the
734 read only flag is set.
735 -y|--yes
737 Do not prompt for confirmation interactively but always assume
738 the answer yes. Use with extreme caution. (For automatic no,
739 see -qq.)
740 -Z|--zero y|n
742 Controls zeroing of the first 4KiB of data in the new LV.
743 Default is y. Snapshot COW volumes are always zeroed. LV is
744 not zeroed if the read only flag is set. Warning: trying to
745 mount an unzeroed LV can cause the system to hang.
746
748 VG
749 Volume Group name. See lvm(8) for valid names. For lvcreate,
750 the required VG positional arg may be omitted when the VG name
751 is included in another option, e.g. --name VG/LV.
752 LV
754 Logical Volume name. See lvm(8) for valid names. An LV posi‐
755 tional arg generally includes the VG name and LV name, e.g.
756 VG/LV. LV followed by _<type> indicates that an LV of the given
757 type is required. (raid represents raid<N> type)
758 PV
760 Physical Volume name, a device path under /dev. For commands
761 managing physical extents, a PV positional arg generally accepts
762 a suffix indicating a range (or multiple ranges) of physical
763 extents (PEs). When the first PE is omitted, it defaults to the
764 start of the device, and when the last PE is omitted it defaults
765 to end. Start and end range (inclusive): PV[:PE-PE]... Start
766 and length range (counting from 0): PV[:PE+PE]...
767 String
769 See the option description for information about the string con‐
770 tent.
771 Size[UNIT]
773 Size is an input number that accepts an optional unit. Input
774 units are always treated as base two values, regardless of capi‐
775 talization, e.g. 'k' and 'K' both refer to 1024. The default
776 input unit is specified by letter, followed by |UNIT. UNIT rep‐
777 resents other possible input units: bBsSkKmMgGtTpPeE. b|B is
778 bytes, s|S is sectors of 512 bytes, k|K is kilobytes, m|M is
779 megabytes, g|G is gigabytes, t|T is terabytes, p|P is petabytes,
780 e|E is exabytes. (This should not be confused with the output
781 control --units, where capital letters mean multiple of 1000.)
782
784 See lvm(8) for information about environment variables used by lvm.
785 For example, LVM_VG_NAME can generally be substituted for a required VG
786 parameter.
787
789 Alternate command forms, advanced command usage, and listing of all
790 valid syntax for completeness.
791 Create an LV that returns errors when used.
793 lvcreate --type error -L|--size Size[m|UNIT] VG
795 [ -l|--extents Number[PERCENT] ]
796 [ COMMON_OPTIONS ]
797 -
798 Create an LV that returns zeros when read.
800 lvcreate --type zero -L|--size Size[m|UNIT] VG
802 [ -l|--extents Number[PERCENT] ]
803 [ COMMON_OPTIONS ]
804 -
805 Create a linear LV.
807 lvcreate --type linear -L|--size Size[m|UNIT] VG
809 [ -l|--extents Number[PERCENT] ]
810 [ COMMON_OPTIONS ]
811 [ PV ... ]
812 -
813 Create a striped LV (also see lvcreate --stripes).
815 lvcreate --type striped -L|--size Size[m|UNIT] VG
817 [ -l|--extents Number[PERCENT] ]
818 [ -i|--stripes Number ]
819 [ -I|--stripesize Size[k|UNIT] ]
820 [ COMMON_OPTIONS ]
821 [ PV ... ]
822 -
823 Create a mirror LV (also see --type raid1).
825 lvcreate --type mirror -L|--size Size[m|UNIT] VG
827 [ -l|--extents Number[PERCENT] ]
828 [ -m|--mirrors Number ]
829 [ -R|--regionsize Size[m|UNIT] ]
830 [ -i|--stripes Number ]
831 [ -I|--stripesize Size[k|UNIT] ]
832 [ --mirrorlog core|disk ]
833 [ COMMON_OPTIONS ]
834 [ PV ... ]
835 -
836 Create a COW snapshot LV of an origin LV
838 (also see --snapshot).
839 lvcreate --type snapshot -L|--size Size[m|UNIT] LV
841 [ -l|--extents Number[PERCENT] ]
842 [ -s|--snapshot ]
843 [ -i|--stripes Number ]
844 [ -I|--stripesize Size[k|UNIT] ]
845 [ -c|--chunksize Size[k|UNIT] ]
846 [ COMMON_OPTIONS ]
847 [ PV ... ]
848 -
849 Create a sparse COW snapshot LV of a virtual origin LV
851 (also see --snapshot).
852 lvcreate --type snapshot -L|--size Size[m|UNIT]
854 -V|--virtualsize Size[m|UNIT] VG
855 [ -l|--extents Number[PERCENT] ]
856 [ -s|--snapshot ]
857 [ -c|--chunksize Size[k|UNIT] ]
858 [ COMMON_OPTIONS ]
859 [ PV ... ]
860 -
861 Create a sparse COW snapshot LV of a virtual origin LV.
863 lvcreate -s|--snapshot -L|--size Size[m|UNIT]
865 -V|--virtualsize Size[m|UNIT] VG
866 [ -l|--extents Number[PERCENT] ]
867 [ -c|--chunksize Size[k|UNIT] ]
868 [ --type snapshot ]
869 [ COMMON_OPTIONS ]
870 [ PV ... ]
871 -
872 Create a thin pool (infers --type thin-pool).
874 lvcreate -T|--thin -L|--size Size[m|UNIT] VG
876 [ -l|--extents Number[PERCENT] ]
877 [ -c|--chunksize Size[k|UNIT] ]
878 [ -i|--stripes Number ]
879 [ -I|--stripesize Size[k|UNIT] ]
880 [ --type thin-pool ]
881 [ --poolmetadatasize Size[m|UNIT] ]
882 [ --poolmetadataspare y|n ]
883 [ --discards passdown|nopassdown|ignore ]
884 [ --errorwhenfull y|n ]
885 [ COMMON_OPTIONS ]
886 [ PV ... ]
887 -
888 Create a thin pool named by the --thinpool arg
890 (infers --type thin-pool).
891 lvcreate -L|--size Size[m|UNIT] --thinpool LV_new VG
893 [ -l|--extents Number[PERCENT] ]
894 [ -T|--thin ]
895 [ -c|--chunksize Size[k|UNIT] ]
896 [ -i|--stripes Number ]
897 [ -I|--stripesize Size[k|UNIT] ]
898 [ --type thin-pool ]
899 [ --poolmetadatasize Size[m|UNIT] ]
900 [ --poolmetadataspare y|n ]
901 [ --discards passdown|nopassdown|ignore ]
902 [ --errorwhenfull y|n ]
903 [ COMMON_OPTIONS ]
904 [ PV ... ]
905 -
906 Create a cache pool named by the --cachepool arg
908 (variant, uses --cachepool in place of --name).
909 lvcreate --type cache-pool -L|--size Size[m|UNIT]
911 --cachepool LV_new VG
912 [ -l|--extents Number[PERCENT] ]
913 [ -H|--cache ]
914 [ -c|--chunksize Size[k|UNIT] ]
915 [ --poolmetadatasize Size[m|UNIT] ]
916 [ --poolmetadataspare y|n ]
917 [ --cachemode writethrough|writeback|passthrough ]
918 [ --cachepolicy String ]
919 [ --cachesettings String ]
920 [ --cachemetadataformat auto|1|2 ]
921 [ COMMON_OPTIONS ]
922 [ PV ... ]
923 -
924 Create a thin LV in a thin pool.
926 lvcreate --type thin -V|--virtualsize Size[m|UNIT]
928 --thinpool LV_thinpool VG
929 [ -T|--thin ]
930 [ -c|--chunksize Size[k|UNIT] ]
931 [ --poolmetadatasize Size[m|UNIT] ]
932 [ --poolmetadataspare y|n ]
933 [ --discards passdown|nopassdown|ignore ]
934 [ --errorwhenfull y|n ]
935 [ COMMON_OPTIONS ]
936 -
937 Create a thin LV in a thin pool named in the first arg
939 (variant, also see --thinpool for naming pool).
940 lvcreate --type thin -V|--virtualsize Size[m|UNIT] LV_thinpool
942 [ -T|--thin ]
943 [ --discards passdown|nopassdown|ignore ]
944 [ --errorwhenfull y|n ]
945 [ COMMON_OPTIONS ]
946 -
947 Create a thin LV in the thin pool named in the first arg
949 (variant, infers --type thin, also see --thinpool for
950 naming pool.)
951 lvcreate -V|--virtualsize Size[m|UNIT] LV_thinpool
953 [ -T|--thin ]
954 [ --type thin ]
955 [ --discards passdown|nopassdown|ignore ]
956 [ --errorwhenfull y|n ]
957 [ COMMON_OPTIONS ]
958 -
959 Create a thin LV that is a snapshot of an existing thin LV.
961 lvcreate --type thin LV_thin
963 [ -T|--thin ]
964 [ --discards passdown|nopassdown|ignore ]
965 [ --errorwhenfull y|n ]
966 [ COMMON_OPTIONS ]
967 -
968 Create a thin LV that is a snapshot of an existing thin LV
970 (infers --type thin).
971 lvcreate -T|--thin LV_thin
973 [ --type thin ]
974 [ --discards passdown|nopassdown|ignore ]
975 [ --errorwhenfull y|n ]
976 [ COMMON_OPTIONS ]
977 -
978 Create a thin LV that is a snapshot of an external origin LV
980 (infers --type thin).
981 lvcreate -s|--snapshot --thinpool LV_thinpool LV
983 [ --type thin ]
984 [ --discards passdown|nopassdown|ignore ]
985 [ --errorwhenfull y|n ]
986 [ COMMON_OPTIONS ]
987 -
988 Create a thin LV, first creating a thin pool for it,
990 where the new thin pool is named by the --thinpool arg
991 (variant, infers --type thin).
992 lvcreate -V|--virtualsize Size[m|UNIT] -L|--size Size[m|UNIT]
994 --thinpool LV_new
995 [ -l|--extents Number[PERCENT] ]
996 [ -T|--thin ]
997 [ -c|--chunksize Size[k|UNIT] ]
998 [ -i|--stripes Number ]
999 [ -I|--stripesize Size[k|UNIT] ]
1000 [ --poolmetadatasize Size[m|UNIT] ]
1001 [ --poolmetadataspare y|n ]
1002 [ --discards passdown|nopassdown|ignore ]
1003 [ --errorwhenfull y|n ]
1004 [ COMMON_OPTIONS ]
1005 [ PV ... ]
1006 -
1007 Create a thin LV, first creating a thin pool for it,
1009 where the new thin pool is named by the --thinpool arg
1010 (variant, infers --type thin).
1011 lvcreate -V|--virtualsize Size[m|UNIT] -L|--size Size[m|UNIT]
1013 --thinpool LV_new VG
1014 [ -l|--extents Number[PERCENT] ]
1015 [ -T|--thin ]
1016 [ -c|--chunksize Size[k|UNIT] ]
1017 [ -i|--stripes Number ]
1018 [ -I|--stripesize Size[k|UNIT] ]
1019 [ --poolmetadatasize Size[m|UNIT] ]
1020 [ --poolmetadataspare y|n ]
1021 [ --discards passdown|nopassdown|ignore ]
1022 [ --errorwhenfull y|n ]
1023 [ COMMON_OPTIONS ]
1024 [ PV ... ]
1025 -
1026 Create a thin LV, first creating a thin pool for it,
1028 where the new thin pool is named in the first arg,
1029 or the new thin pool name is generated when the first
1030 arg is a VG name.
1031 lvcreate --type thin -V|--virtualsize Size[m|UNIT]
1033 -L|--size Size[m|UNIT] VG|LV_new
1034 [ -l|--extents Number[PERCENT] ]
1035 [ -T|--thin ]
1036 [ -c|--chunksize Size[k|UNIT] ]
1037 [ -i|--stripes Number ]
1038 [ -I|--stripesize Size[k|UNIT] ]
1039 [ --poolmetadatasize Size[m|UNIT] ]
1040 [ --poolmetadataspare y|n ]
1041 [ --discards passdown|nopassdown|ignore ]
1042 [ --errorwhenfull y|n ]
1043 [ COMMON_OPTIONS ]
1044 [ PV ... ]
1045 -
1046 Create a thin LV, first creating a thin pool for it,
1048 where the new thin pool is named in the first arg,
1049 or the new thin pool name is generated when the first
1050 arg is a VG name (variant, infers --type thin).
1051 lvcreate -T|--thin -V|--virtualsize Size[m|UNIT]
1053 -L|--size Size[m|UNIT] VG|LV_new
1054 [ -l|--extents Number[PERCENT] ]
1055 [ -c|--chunksize Size[k|UNIT] ]
1056 [ -i|--stripes Number ]
1057 [ -I|--stripesize Size[k|UNIT] ]
1058 [ --poolmetadatasize Size[m|UNIT] ]
1059 [ --poolmetadataspare y|n ]
1060 [ --discards passdown|nopassdown|ignore ]
1061 [ --errorwhenfull y|n ]
1062 [ COMMON_OPTIONS ]
1063 [ PV ... ]
1064 -
1065 Create a thin LV, first creating a thin pool for it
1067 (infers --type thin).
1068 Create a sparse snapshot of a virtual origin LV
1069 (infers --type snapshot).
1070 Chooses --type thin or --type snapshot according to
1071 config setting sparse_segtype_default.
1072 lvcreate -L|--size Size[m|UNIT] -V|--virtualsize Size[m|UNIT] VG
1074 [ -l|--extents Number[PERCENT] ]
1075 [ -s|--snapshot ]
1076 [ -c|--chunksize Size[k|UNIT] ]
1077 [ -i|--stripes Number ]
1078 [ -I|--stripesize Size[k|UNIT] ]
1079 [ --type snapshot ]
1080 [ --poolmetadatasize Size[m|UNIT] ]
1081 [ --poolmetadataspare y|n ]
1082 [ --discards passdown|nopassdown|ignore ]
1083 [ --errorwhenfull y|n ]
1084 [ COMMON_OPTIONS ]
1085 [ PV ... ]
1086 -
1087 Create a cache LV, first creating a new origin LV,
1089 then combining it with the existing cache pool named
1090 by the --cachepool arg (variant, infers --type cache).
1091 lvcreate -L|--size Size[m|UNIT] --cachepool LV_cachepool VG
1093 [ -l|--extents Number[PERCENT] ]
1094 [ -H|--cache ]
1095 [ -c|--chunksize Size[k|UNIT] ]
1096 [ -i|--stripes Number ]
1097 [ -I|--stripesize Size[k|UNIT] ]
1098 [ --type cache ]
1099 [ --cachemode writethrough|writeback|passthrough ]
1100 [ --cachepolicy String ]
1101 [ --cachesettings String ]
1102 [ --cachemetadataformat auto|1|2 ]
1103 [ COMMON_OPTIONS ]
1104 [ PV ... ]
1105 -
1106 Create a cache LV, first creating a new origin LV,
1108 then combining it with the existing cache pool named
1109 in the first arg (variant, also use --cachepool).
1110 lvcreate --type cache -L|--size Size[m|UNIT] LV_cachepool
1112 [ -l|--extents Number[PERCENT] ]
1113 [ -H|--cache ]
1114 [ -c|--chunksize Size[k|UNIT] ]
1115 [ -i|--stripes Number ]
1116 [ -I|--stripesize Size[k|UNIT] ]
1117 [ --poolmetadatasize Size[m|UNIT] ]
1118 [ --poolmetadataspare y|n ]
1119 [ --cachemode writethrough|writeback|passthrough ]
1120 [ --cachepolicy String ]
1121 [ --cachesettings String ]
1122 [ --cachemetadataformat auto|1|2 ]
1123 [ COMMON_OPTIONS ]
1124 [ PV ... ]
1125 -
1126 When LV is a cache pool, create a cache LV,
1128 first creating a new origin LV, then combining it with
1129 the existing cache pool named in the first arg
1130 (variant, infers --type cache, also use --cachepool).
1131 When LV is not a cache pool, convert the specified LV
1132 to type cache after creating a new cache pool LV to use
1133 (use lvconvert).
1134 lvcreate -H|--cache -L|--size Size[m|UNIT] LV
1136 [ -l|--extents Number[PERCENT] ]
1137 [ -c|--chunksize Size[k|UNIT] ]
1138 [ -i|--stripes Number ]
1139 [ -I|--stripesize Size[k|UNIT] ]
1140 [ --cachemode writethrough|writeback|passthrough ]
1141 [ --cachepolicy String ]
1142 [ --cachesettings String ]
1143 [ --cachemetadataformat auto|1|2 ]
1144 [ --poolmetadatasize Size[m|UNIT] ]
1145 [ --poolmetadataspare y|n ]
1146 [ COMMON_OPTIONS ]
1147 [ PV ... ]
1148 -
1149
1152 Create a striped LV with 3 stripes, a stripe size of 8KiB and a size of
1153 100MiB. The LV name is chosen by lvcreate.
1154 lvcreate -i 3 -I 8 -L 100m vg00
1155 Create a raid1 LV with two images, and a useable size of 500 MiB. This
1157 operation requires two devices, one for each mirror image. RAID meta‐
1158 data (superblock and bitmap) is also included on the two devices.
1159 lvcreate --type raid1 -m1 -L 500m -n mylv vg00
1160 Create a mirror LV with two images, and a useable size of 500 MiB.
1162 This operation requires three devices: two for mirror images and one
1163 for a disk log.
1164 lvcreate --type mirror -m1 -L 500m -n mylv vg00
1165 Create a mirror LV with 2 images, and a useable size of 500 MiB. This
1167 operation requires 2 devices because the log is in memory.
1168 lvcreate --type mirror -m1 --mirrorlog core -L 500m -n mylv vg00
1169 Create a copy-on-write snapshot of an LV:
1171 lvcreate --snapshot --size 100m --name mysnap vg00/mylv
1172 Create a copy-on-write snapshot with a size sufficient for overwriting
1174 20% of the size of the original LV.
1175 lvcreate -s -l 20%ORIGIN -n mysnap vg00/mylv
1176 Create a sparse LV with 1TiB of virtual space, and actual space just
1178 under 100MiB.
1179 lvcreate --snapshot --virtualsize 1t --size 100m --name mylv vg00
1180 Create a linear LV with a usable size of 64MiB on specific physical
1182 extents.
1183 lvcreate -L 64m -n mylv vg00 /dev/sda:0-7 /dev/sdb:0-7
1184 Create a RAID5 LV with a usable size of 5GiB, 3 stripes, a stripe size
1186 of 64KiB, using a total of 4 devices (including one for parity).
1187 lvcreate --type raid5 -L 5G -i 3 -I 64 -n mylv vg00
1188 Create a RAID5 LV using all of the free space in the VG and spanning
1190 all the PVs in the VG (note that the command will fail if there are
1191 more than 8 PVs in the VG, in which case -i 7 must be used to get to
1192 the current maximum of 8 devices including parity for RaidLVs).
1193 lvcreate --config allocation/raid_stripe_all_devices=1
1194 --type raid5 -l 100%FREE -n mylv vg00
1195 Create RAID10 LV with a usable size of 5GiB, using 2 stripes, each on a
1197 two-image mirror. (Note that the -i and -m arguments behave differ‐
1198 ently: -i specifies the total number of stripes, but -m specifies the
1199 number of images in addition to the first image).
1200 lvcreate --type raid10 -L 5G -i 2 -m 1 -n mylv vg00
1201 Create a 1TiB thin LV, first creating a new thin pool for it, where the
1203 thin pool has 100MiB of space, uses 2 stripes, has a 64KiB stripe size,
1204 and 256KiB chunk size.
1205 lvcreate --type thin --name mylv --thinpool mypool
1206 -V 1t -L 100m -i 2 -I 64 -c 256 vg00
1207 Create a thin snapshot of a thin LV (the size option must not be used,
1209 otherwise a copy-on-write snapshot would be created).
1210 lvcreate --snapshot --name mysnap vg00/thinvol
1211 Create a thin snapshot of the read-only inactive LV named "origin"
1213 which becomes an external origin for the thin snapshot LV.
1214 lvcreate --snapshot --name mysnap --thinpool mypool vg00/origin
1215 Create a cache pool from a fast physical device. The cache pool can
1217 then be used to cache an LV.
1218 lvcreate --type cache-pool -L 1G -n my_cpool vg00 /dev/fast1
1219 Create a cache LV, first creating a new origin LV on a slow physical
1221 device, then combining the new origin LV with an existing cache pool.
1222 lvcreate --type cache --cachepool my_cpool
1223 -L 100G -n mylv vg00 /dev/slow1
1224
1226 lvm(8) lvm.conf(5) lvmconfig(8)
1227 pvchange(8) pvck(8) pvcreate(8) pvdisplay(8) pvmove(8) pvremove(8)
1229 pvresize(8) pvs(8) pvscan(8)
1230 vgcfgbackup(8) vgcfgrestore(8) vgchange(8) vgck(8) vgcreate(8) vgcon‐
1232 vert(8) vgdisplay(8) vgexport(8) vgextend(8) vgimport(8) vgimport‐
1233 clone(8) vgmerge(8) vgmknodes(8) vgreduce(8) vgremove(8) vgrename(8)
1234 vgs(8) vgscan(8) vgsplit(8)
1235 lvcreate(8) lvchange(8) lvconvert(8) lvdisplay(8) lvextend(8) lvre‐
1237 duce(8) lvremove(8) lvrename(8) lvresize(8) lvs(8) lvscan(8)
1238 lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8) blkdeacti‐
1240 vate(8) lvmdump(8)
1241 dmeventd(8) lvmetad(8) lvmpolld(8) lvmlockd(8) lvmlockctl(8) clvmd(8)
1243 cmirrord(8) lvmdbusd(8)
1244 lvmsystemid(7) lvmreport(7) lvmraid(7) lvmthin(7) lvmcache(7)
1246Red Hat, Inc. LVM TOOLS 2.02.183(2) (2018-12-07) LVCREATE(8)