проверить метаданные на физических томах (Check metadata on physical volumes)
Имя (Name)
pvck — Check metadata on physical volumes
Синопсис (Synopsis)
pvck option_args position_args
[ option_args ]
--commandprofile String
--config String
-d|--debug
--devices PV
--devicesfile String
--driverloaded y|n
--dump headers|metadata|metadata_all|metadata_search
-f|--file String
-h|--help
--labelsector Number
--lockopt String
--longhelp
--nolocking
--profile String
--[pv]metadatacopies 0|1|2
-q|--quiet
--repair
--repairtype pv_header|metadata|label_header
--settings String
-t|--test
-v|--verbose
--version
-y|--yes
Описание (Description)
pvck checks and repairs LVM metadata on PVs.
Dump options
headers
Print LVM on-disk headers and structures: label_header,
pv_header, mda_header(s), and metadata text. Warnings are
printed if any values are incorrect. The label_header and
pv_header both exist in a 512 byte sector, usually the second
sector of the device. An mda_header exists in a 512 byte sector
at offset 4096 bytes. A second mda_header can optionally exist
near the end of the device. The metadata text exists in an area
(about 1MiB by default) immediately following the mda_header
sector. The metadata text is checked but not printed (see other
options).
metadata
Print the current LVM VG metadata text (or save to a file), using
headers to locate the latest copy of metadata. If headers are
damaged, metadata may not be found (see metadata_search). Use
--settings "mda_num=2" to look in mda2 (the second mda at the end
of the device, if used). The metadata text is printed to stdout
or saved to a file with --file.
metadata_all
List all versions of VG metadata found in the metadata area,
using headers to locate metadata. Full copies of all metadata
are saved to a file with the --file option. If headers are
damaged, metadata may not be found (see metadata_search). Use
--settings "mda_num=2" as above. Use -v to include descriptions
and dates when listing metadata versions.
metadata_search
List all versions of VG metadata found in the metadata area,
searching common locations so metadata can be found if headers
are damaged. Full copies of all metadata are saved to a file
with the --file option. To save one specific version of
metadata, use --settings "metadata_offset=<offset>", where the
offset is taken from the list of versions found. Use -v to
include descriptions and dates when listing metadata versions.
metadata_area
Save the entire text metadata area to a file without processing.
Repair options
--repair
Repair headers and metadata on a PV. This uses a metadata input
file that was extracted by --dump, or a backup file (from
/etc/lvm/backup). When possible, use metadata saved by --dump
from another PV in the same VG (or from a second metadata area on
the PV).
There are cases where the PV UUID needs to be specified for the
PV being repaired. It is specified using --settings
"pv_uuid=<UUID>". In particular, if the device name for the PV
being repaired does not match the previous device name of the PV,
then LVM may not be able to determine the correct PV UUID. When
headers are damaged on more than one PV in a VG, it is important
for the user to determine the correct PV UUID and specify it in
--settings. Otherwise, the wrong PV UUID could be used if device
names have been swapped since the metadata was last written.
If a PV has no metadata areas and the pv_header is damaged, then
the repair will not know to create no metadata areas during
repair. It will by default repair metadata in mda1. To repair
with no metadata areas, use --settings "mda_offset=0 mda_size=0".
There are cases where repair should be run on all PVs in the VG
(using the same metadata file): if all PVs in the VG are
damaged, if using an old metadata version, or if a backup file is
used instead of raw metadata (taken from pvck dump.)
Using --repair is equivalent to running --repairtype pv_header
followed by --repairtype metadata.
--repairtype pv_header
Repairs the header sector, containing the pv_header and
label_header.
--repairtype metadata
Repairs the mda_header and metadata text. It requires the
headers to be correct (having been undamaged or already
repaired).
--repairtype label_header
Repairs label_header fields, leaving the pv_header (in the same
sector) unchanged. (repairtype pv_header should usually be used
instead.)
Settings
The --settings option controls or overrides certain dump or
repair behaviors. All offset and size values in settings are in
bytes (units are not recognized.) These settings are subject to
change.
mda_num=1|2
Select which metadata area should be used. By default the first
metadata area (1) is used. mda1 is always located at offset
4096. mda2, at the end of the device, often does not exist (it's
not created by default.) If mda1 is erased, mda2, if it exists,
will often still have metadata.
metadata_offset=bytes
Select metadata text at this offset. Use with metadata_search to
print/save one instance of metadata text.
mda_offset=bytes mda_size=bytes
Refers to a metadata area (mda) location and size. An mda
includes an mda_header and circular metadata text buffer.
Setting this forces metadata_search look for metadata in the
given area instead of the standard locations. When set to zero
with repair, it indicates no metadata areas should exist.
mda2_offset=bytes mda2_size=bytes
When repairing a pv_header, this forces a specific offset and
size for mda2 that should be recorded in the pv_header.
pv_uuid=uuid
Specify the PV UUID of the device being repaired. When not
specified, repair will attempt to determine the correct PV UUID
by matching a device name in the metadata.
device_size=bytes
data_offset=bytes
When repairing a pv_header, the device_size, data_offset, and
pvid can all be specified directly, in which case these values
are not taken from a metadata file (where they usually come
from), and the metadata file can be omitted. data_offset is the
starting location of the first physical extent (data), which
follows the first metadata area.
Использование (Usage)
Check for metadata on a device
pvck PV ...
[ COMMON_OPTIONS ]
—
Check and print LVM headers and metadata on a device
pvck --dump headers|metadata|metadata_all|metadata_search PV
[ -f|--file String ]
[ --settings String ]
[ --[pv]metadatacopies 0|1|2 ]
[ COMMON_OPTIONS ]
—
Repair LVM headers or metadata on a device
pvck --repairtype pv_header|metadata|label_header PV
[ -f|--file String ]
[ --settings String ]
[ COMMON_OPTIONS ]
—
Repair LVM headers and metadata on a device
pvck --repair -f|--file String PV
[ --settings String ]
[ COMMON_OPTIONS ]
—
Common options for command:
[ --labelsector Number ]
Common options for lvm:
[ -d|--debug ]
[ -h|--help ]
[ -q|--quiet ]
[ -t|--test ]
[ -v|--verbose ]
[ -y|--yes ]
[ --commandprofile String ]
[ --config String ]
[ --devices PV ]
[ --devicesfile String ]
[ --driverloaded y|n ]
[ --lockopt String ]
[ --longhelp ]
[ --nolocking ]
[ --profile String ]
[ --version ]
Параметры (Options)
--commandprofile String
The command profile to use for command configuration. See
lvm.conf(5) for more information about profiles.
--config String
Config settings for the command. These override
lvm.conf(5) settings. The String arg uses the same format
as lvm.conf(5), or may use section/field syntax. See
lvm.conf(5) for more information about config.
-d|--debug ...
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).
--devices PV
Devices that the command can use. This option can be
repeated or accepts a comma separated list of devices.
This overrides the devices file.
--devicesfile String
A file listing devices that LVM should use. The file must
exist in /etc/lvm/devices/ and is managed with the
lvmdevices(8) command. This overrides the lvm.conf(5)
devices/devicesfile and devices/use_devicesfile settings.
--driverloaded y|n
If set to no, the command will not attempt to use device-
mapper. For testing and debugging.
--dump headers|metadata|metadata_all|metadata_search
Dump headers and metadata from a PV for debugging and
repair. Option values include: headers to print and check
LVM headers, metadata to print or save the current text
metadata, metadata_all to list or save all versions of
metadata, metadata_search to list or save all versions of
metadata, searching standard locations in case of damaged
headers, metadata_area to save an entire text metadata
area to a file.
-f|--file String
Metadata file to read or write.
-h|--help
Display help text.
--labelsector Number
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.
--lockopt String
Used to pass options for special cases to lvmlockd. See
lvmlockd(8) for more information.
--longhelp
Display long help text.
--nolocking
Disable locking.
--profile String
An alias for --commandprofile or --metadataprofile,
depending on the command.
--[pv]metadatacopies 0|1|2
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.)
-q|--quiet ...
Suppress output and log messages. Overrides --debug and
--verbose. Repeat once to also suppress any prompts with
answer 'no'.
--repair
Repair headers and metadata on a PV.
--repairtype pv_header|metadata|label_header
Repair headers and metadata on a PV. See command
description.
--settings String
Specifies command specific settings in "Key = Value" form.
Combine multiple settings in quotes, or repeat the
settings option for each.
-t|--test
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.
-v|--verbose ...
Set verbose level. Repeat from 1 to 4 times to increase
the detail of messages sent to stdout and stderr.
--version
Display version information.
-y|--yes
Do not prompt for confirmation interactively but always
assume the answer yes. Use with extreme caution. (For
automatic no, see -qq.)
Переменные (Variables)
PV 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): PV[:PE-PE]... Start and length range
(counting from 0): PV[:PE+PE]...
String See the option description for information about the
string content.
Size[UNIT]
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: b|B is bytes, s|S is sectors of 512 bytes, k|K is
KiB, m|M is MiB, g|G is GiB, t|T is TiB, p|P is PiB, e|E
is EiB. (This should not be confused with the output
control --units, where capital letters mean multiple of
1000.)
Переменные окружения (Environment variables)
See lvm(8) for information about environment variables used by
lvm. For example, LVM_VG_NAME can generally be substituted for a
required VG parameter.
Примеры (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 --labelsector
parameter with a value of 204800 (100 * 1024 * 1024 / 512 =
204800).
pvck --labelsector 204800 /dev/sda
Смотри также (See also)
lvm(8), lvm.conf(5), lvmconfig(8), lvmdevices(8),
pvchange(8), pvck(8), pvcreate(8), pvdisplay(8), pvmove(8),
pvremove(8), pvresize(8), pvs(8), pvscan(8),
vgcfgbackup(8), vgcfgrestore(8), vgchange(8), vgck(8),
vgcreate(8), vgconvert(8), vgdisplay(8), vgexport(8),
vgextend(8), vgimport(8), vgimportclone(8), vgimportdevices(8),
vgmerge(8), vgmknodes(8), vgreduce(8), vgremove(8), vgrename(8),
vgs(8), vgscan(8), vgsplit(8),
lvcreate(8), lvchange(8), lvconvert(8), lvdisplay(8),
lvextend(8), lvreduce(8), lvremove(8), lvrename(8), lvresize(8),
lvs(8), lvscan(8),
lvm-fullreport(8), lvm-lvpoll(8), lvm2-activation-generator(8),
blkdeactivate(8), lvmdump(8),
dmeventd(8), lvmpolld(8), lvmlockd(8), lvmlockctl(8),
cmirrord(8), lvmdbusd(8), fsadm(8),
lvmsystemid(7), lvmreport(7), lvmraid(7), lvmthin(7), lvmcache(7)
