lvm2/man/pvck.8_pregen

.TH PVCK 8 "LVM TOOLS #VERSION#" "Red Hat, Inc."
.SH NAME
pvck - Check metadata on physical volumes
.
.SH SYNOPSIS
\fBpvck\fP \fIoption_args\fP \fIposition_args\fP
.br
    [ \fIoption_args\fP ]
.br
.SH DESCRIPTION
pvck checks LVM metadata on PVs.

Use the --dump option to extract metadata from PVs for debugging.
With dump, set --pvmetadatacopies 2 to extract metadata from a
second metadata area at the end of the device. Use the --file
option to save the raw metadata to a specified file. (The raw
metadata is not usable with vgcfgbackup and vgcfgrestore.)

.SH USAGE
Check for metadata on a device
.br
.P
\fBpvck\fP \fIPV\fP ...
.br
.RS 4
[ COMMON_OPTIONS ]
.RE
.br

Print metadata from a device
.br
.P
\fBpvck\fP \fB--dump\fP \fIString\fP \fIPV\fP
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.RS 4
.ad l
[ \fB-f\fP|\fB--file\fP \fIString\fP ]
.ad b
.br
.ad l
[    \fB--[pv]metadatacopies\fP \fB0\fP|\fB1\fP|\fB2\fP ]
.ad b
.br
[ COMMON_OPTIONS ]
.RE
.br

Common options for command:
.
.RS 4
.ad l
[    \fB--labelsector\fP \fINumber\fP ]
.ad b
.RE

Common options for lvm:
.
.RS 4
.ad l
[ \fB-d\fP|\fB--debug\fP ]
.ad b
.br
.ad l
[ \fB-h\fP|\fB--help\fP ]
.ad b
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.ad l
[ \fB-q\fP|\fB--quiet\fP ]
.ad b
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.ad l
[ \fB-t\fP|\fB--test\fP ]
.ad b
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.ad l
[ \fB-v\fP|\fB--verbose\fP ]
.ad b
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.ad l
[ \fB-y\fP|\fB--yes\fP ]
.ad b
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.ad l
[    \fB--commandprofile\fP \fIString\fP ]
.ad b
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.ad l
[    \fB--config\fP \fIString\fP ]
.ad b
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.ad l
[    \fB--driverloaded\fP \fBy\fP|\fBn\fP ]
.ad b
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.ad l
[    \fB--lockopt\fP \fIString\fP ]
.ad b
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.ad l
[    \fB--longhelp\fP ]
.ad b
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.ad l
[    \fB--nolocking\fP ]
.ad b
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.ad l
[    \fB--profile\fP \fIString\fP ]
.ad b
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.ad l
[    \fB--version\fP ]
.ad b
.RE
.SH OPTIONS
.HP
.ad l
\fB--commandprofile\fP \fIString\fP
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The command profile to use for command configuration.
See \fBlvm.conf\fP(5) for more information about profiles.
.ad b
.HP
.ad l
\fB--config\fP \fIString\fP
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Config settings for the command. These override lvm.conf settings.
The String arg uses the same format as lvm.conf,
or may use section/field syntax.
See \fBlvm.conf\fP(5) for more information about config.
.ad b
.HP
.ad l
\fB-d\fP|\fB--debug\fP ...
.br
Set debug level. Repeat from 1 to 6 times to increase the detail of
messages sent to the log file and/or syslog (if configured).
.ad b
.HP
.ad l
\fB--driverloaded\fP \fBy\fP|\fBn\fP
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If set to no, the command will not attempt to use device-mapper.
For testing and debugging.
.ad b
.HP
.ad l
\fB--dump\fP \fIString\fP
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Dump metadata from a PV. Option values include \fBmetadata\fP
to print or save the current text metadata, \fBmetadata_area\fP
to save the entire text metadata area to a file, \fBmetadata_all\fP
to save the current and any previous complete versions of metadata
to a file, and \fBheaders\fP to print and check LVM headers.
.ad b
.HP
.ad l
\fB-f\fP|\fB--file\fP \fIString\fP
.br
.ad b
.HP
.ad l
\fB-h\fP|\fB--help\fP
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Display help text.
.ad b
.HP
.ad l
\fB--labelsector\fP \fINumber\fP
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By default the PV is labelled with an LVM2 identifier in its second
sector (sector 1). This lets you use a different sector near the
start of the disk (between 0 and 3 inclusive - see LABEL_SCAN_SECTORS
in the source). Use with care.
.ad b
.HP
.ad l
\fB--lockopt\fP \fIString\fP
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Used to pass options for special cases to lvmlockd.
See \fBlvmlockd\fP(8) for more information.
.ad b
.HP
.ad l
\fB--longhelp\fP
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Display long help text.
.ad b
.HP
.ad l
\fB--nolocking\fP
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Disable locking.
.ad b
.HP
.ad l
\fB--profile\fP \fIString\fP
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An alias for --commandprofile or --metadataprofile, depending
on the command.
.ad b
.HP
.ad l
\fB--[pv]metadatacopies\fP \fB0\fP|\fB1\fP|\fB2\fP
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The number of metadata areas to set aside on a PV for storing VG metadata.
When 2, one copy of the VG metadata is stored at the front of the PV
and a second copy is stored at the end.
When 1, one copy of the VG metadata is stored at the front of the PV.
When 0, no copies of the VG metadata are stored on the given PV.
This may be useful in VGs containing many PVs (this places limitations
on the ability to use vgsplit later.)
.ad b
.HP
.ad l
\fB-q\fP|\fB--quiet\fP ...
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Suppress output and log messages. Overrides --debug and --verbose.
Repeat once to also suppress any prompts with answer 'no'.
.ad b
.HP
.ad l
\fB-t\fP|\fB--test\fP
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Run in test mode. Commands will not update metadata.
This is implemented by disabling all metadata writing but nevertheless
returning success to the calling function. This may lead to unusual
error messages in multi-stage operations if a tool relies on reading
back metadata it believes has changed but hasn't.
.ad b
.HP
.ad l
\fB-v\fP|\fB--verbose\fP ...
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Set verbose level. Repeat from 1 to 4 times to increase the detail
of messages sent to stdout and stderr.
.ad b
.HP
.ad l
\fB--version\fP
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Display version information.
.ad b
.HP
.ad l
\fB-y\fP|\fB--yes\fP
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Do not prompt for confirmation interactively but always assume the
answer yes. Use with extreme caution.
(For automatic no, see -qq.)
.ad b
.SH VARIABLES
.HP
\fIPV\fP
.br
Physical Volume name, a device path under /dev.
For commands managing physical extents, a PV positional arg
generally accepts a suffix indicating a range (or multiple ranges)
of physical extents (PEs). When the first PE is omitted, it defaults
to the start of the device, and when the last PE is omitted it defaults to end.
Start and end range (inclusive): \fIPV\fP[\fB:\fP\fIPE\fP\fB-\fP\fIPE\fP]...
Start and length range (counting from 0): \fIPV\fP[\fB:\fP\fIPE\fP\fB+\fP\fIPE\fP]...
.HP
\fIString\fP
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See the option description for information about the string content.
.HP
\fISize\fP[UNIT]
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Size is an input number that accepts an optional unit.
Input units are always treated as base two values, regardless of
capitalization, e.g. 'k' and 'K' both refer to 1024.
The default input unit is specified by letter, followed by |UNIT.
UNIT represents other possible input units: \fBbBsSkKmMgGtTpPeE\fP.
b|B is bytes, s|S is sectors of 512 bytes, k|K is kilobytes,
m|M is megabytes, g|G is gigabytes, t|T is terabytes,
p|P is petabytes, e|E is exabytes.
(This should not be confused with the output control --units, where
capital letters mean multiple of 1000.)
.SH ENVIRONMENT VARIABLES
See \fBlvm\fP(8) for information about environment variables used by lvm.
For example, LVM_VG_NAME can generally be substituted for a required VG parameter.
.SH EXAMPLES

If the partition table is corrupted or lost on /dev/sda, and you suspect
there was an LVM partition at approximately 100 MiB, then this
area of the disk can be scanned using the \fB--labelsector\fP
parameter with a value of 204800 (100 * 1024 * 1024 / 512 = 204800).
.br
.B pvck --labelsector 204800 /dev/sda
.SH SEE ALSO

.BR lvm (8)
.BR lvm.conf (5)
.BR lvmconfig (8)

.BR pvchange (8)
.BR pvck (8)
.BR pvcreate (8)
.BR pvdisplay (8)
.BR pvmove (8)
.BR pvremove (8)
.BR pvresize (8)
.BR pvs (8)
.BR pvscan (8) 

.BR vgcfgbackup (8)
.BR vgcfgrestore (8)
.BR vgchange (8)
.BR vgck (8)
.BR vgcreate (8)
.BR vgconvert (8)
.BR vgdisplay (8)
.BR vgexport (8)
.BR vgextend (8)
.BR vgimport (8)
.BR vgimportclone (8)
.BR vgmerge (8)
.BR vgmknodes (8)
.BR vgreduce (8)
.BR vgremove (8)
.BR vgrename (8)
.BR vgs (8)
.BR vgscan (8)
.BR vgsplit (8) 

.BR lvcreate (8)
.BR lvchange (8)
.BR lvconvert (8)
.BR lvdisplay (8)
.BR lvextend (8)
.BR lvreduce (8)
.BR lvremove (8)
.BR lvrename (8)
.BR lvresize (8)
.BR lvs (8)
.BR lvscan (8)

.BR lvm-fullreport (8)
.BR lvm-lvpoll (8)
.BR lvm2-activation-generator (8)
.BR blkdeactivate (8)
.BR lvmdump (8)

.BR dmeventd (8)
.BR lvmpolld (8)
.BR lvmlockd (8)
.BR lvmlockctl (8)
.BR cmirrord (8)
.BR lvmdbusd (8)

.BR lvmsystemid (7)
.BR lvmreport (7)
.BR lvmraid (7)
.BR lvmthin (7)
.BR lvmcache (7)