PVCREATE(8) System Manager's Manual PVCREATE(8)
NAME
pvcreate - Initialize physical volume(s) for use by LVM
SYNOPSIS
pvcreate position_args
[ option_args ]
DESCRIPTION
pvcreate initializes a PV so that it is recognized as belonging to LVM,
and allows the PV to be used in a VG. A PV can be a disk partition,
whole disk, meta device, or loopback file.
For DOS disk partitions, the partition id should be set to 0x8e using
fdisk(8), cfdisk(8), or a equivalent. For GUID Partition Table (GPT),
the id is E6D6D379-F507-44C2-A23C-238F2A3DF928. For whole disk devices
only the partition table must be erased, which will effectively destroy
all data on that disk. This can be done by zeroing the first sector
with:
dd if=/dev/zero of=PhysicalVolume bs=512 count=1
Use vgcreate(8) to create a new VG on the PV, or vgextend(8) to add the
PV to existing VG.
The force option will create a PV without confirmation. Repeating the
force option (-ff) will forcibly create a PV, overriding checks that
normally prevent it, e.g. if the PV is already in a VG.
USAGE
pvcreate PV ...
[ -f|--force ]
[ -M|--metadatatype lvm2|lvm1 ]
[ -u|--uuid String ]
[ -Z|--zero y|n ]
[ --dataalignment Size[k|UNIT] ]
[ --dataalignmentoffset Size[k|UNIT] ]
[ --bootloaderareasize Size[m|UNIT] ]
[ --labelsector Number ]
[ --[pv]metadatacopies 0|1|2 ]
[ --metadatasize Size[m|UNIT] ]
[ --metadataignore y|n ]
[ --norestorefile ]
[ --setphysicalvolumesize Size[m|UNIT] ]
[ --reportformat basic|json ]
[ --restorefile String ]
[ COMMON_OPTIONS ]
Common options for lvm:
[ -d|--debug ]
[ -h|--help ]
[ -q|--quiet ]
[ -t|--test ]
[ -v|--verbose ]
[ -y|--yes ]
[ --commandprofile String ]
[ --config String ]
[ --driverloaded y|n ]
[ --lockopt String ]
[ --longhelp ]
[ --profile String ]
[ --version ]
OPTIONS
--bootloaderareasize Size[m|UNIT]
Create a separate bootloader area of specified size besides PV's
data area. The bootloader area is an area of reserved space on
the PV from which LVM will not allocate any extents and it's
kept untouched. This is primarily aimed for use with bootloaders
to embed their own data or metadata. The start of the boot-
loader area is always aligned, see also --dataalignment and
--dataalignmentoffset. The bootloader area size may eventually
end up increased due to the alignment, but it's never less than
the size that is requested. To see the bootloader area start and
size of an existing PV use pvs -o +pv_ba_start,pv_ba_size.
--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 set-
tings. The String arg uses the same format as lvm.conf, or may
use section/field syntax. See lvm.conf(5) for more information
about config.
--dataalignment Size[k|UNIT]
Align the start of the data to a multiple of this number. Also
specify an appropriate Physical Extent size when creating a VG.
To see the location of the first Physical Extent of an existing
PV, use pvs -o +pe_start. In addition, it may be shifted by an
alignment offset. See lvm.conf/data_alignment_offset_detection
and --dataalignmentoffset.
--dataalignmentoffset Size[k|UNIT]
Shift the start of the data area by this additional offset.
-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).
--driverloaded y|n
If set to no, the command will not attempt to use device-mapper.
For testing and debugging.
-f|--force ...
Override various checks, confirmations and protections. Use
with extreme caution.
-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 lvm-
lockd(8) for more information.
--longhelp
Display long help text.
--metadataignore y|n
Specifies the metadataignore property of a PV. If yes, metadata
areas on the PV are ignored, and lvm will not store metadata in
the metadata areas of the PV. If no, lvm will store metadata on
the PV.
--metadatasize Size[m|UNIT]
The approximate amount of space used for each VG metadata area.
The size may be rounded.
-M|--metadatatype lvm2|lvm1
Specifies the type of on-disk metadata to use. lvm2 (or just 2)
is the current, standard format. lvm1 (or just 1) is a histori-
cal format that can be used for accessing old data.
--norestorefile
In conjunction with --uuid, this allows a uuid to be specified
without also requiring that a backup of the metadata be pro-
vided.
--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
(starting in the 5th sector). When 0, no copies of the VG meta-
data are stored on the given PV. This may be useful in VGs con-
taining many PVs (this places limitations on the ability to use
vgsplit later.)
-q|--quiet ...
Suppress output and log messages. Overrides --debug and --ver-
bose. Repeat once to also suppress any prompts with answer
'no'.
--reportformat basic|json
Overrides current output format for reports which is defined
globally by the report/output_format setting in lvm.conf. basic
is the original format with columns and rows. If there is more
than one report per command, each report is prefixed with the
report name for identification. json produces report output in
JSON format. See lvmreport(7) for more information.
--restorefile String
In conjunction with --uuid, this reads the file (produced by
vgcfgbackup), extracts the location and size of the data on the
PV, and ensures that the metadata produced by the program is
consistent with the contents of the file, i.e. the physical
extents will be in the same place and not be overwritten by new
metadata. This provides a mechanism to upgrade the metadata for-
mat or to add/remove metadata areas. Use with care.
--setphysicalvolumesize Size[m|UNIT]
Overrides the automatically detected size of the PV. Use with
care, or prior to reducing the physical size of the device.
-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.
-u|--uuid String
Specify a UUID for the device. Without this option, a random
UUID is generated. This option is needed before restoring a
backup of LVM metadata onto a replacement device; see vgcfgre-
store(8). As such, use of --restorefile is compulsory unless the
--norestorefile is used. All PVs must have unique UUIDs, and
LVM will prevent certain operations if multiple devices are seen
with the same UUID. See vgimportclone(8) for more information.
-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.)
-Z|--zero y|n
Controls if the first 4 sectors (2048 bytes) of the device are
wiped. The default is to wipe these sectors unless either or
both of --restorefile or --uuid are specified.
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 con-
tent.
Size[UNIT]
Size is an input number that accepts an optional unit. Input
units are always treated as base two values, regardless of capi-
talization, e.g. 'k' and 'K' both refer to 1024. The default
input unit is specified by letter, followed by |UNIT. UNIT rep-
resents other possible input units: bBsSkKmMgGtTpPeE. 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.)
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.
EXAMPLES
Initialize a partition and a full device.
pvcreate /dev/sdc4 /dev/sde
If a device is a 4KiB sector drive that compensates for windows parti-
tioning (sector 7 is the lowest aligned logical block, the 4KiB sectors
start at LBA -1, and consequently sector 63 is aligned on a 4KiB bound-
ary) manually account for this when initializing for use by LVM.
pvcreate --dataalignmentoffset 7s /dev/sdb
SEE ALSO
lvm(8) lvm.conf(5) lvmconfig(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) vgcon-
vert(8) vgdisplay(8) vgexport(8) vgextend(8) vgimport(8) vgimport-
clone(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) lvre-
duce(8) lvremove(8) lvrename(8) lvresize(8) lvs(8) lvscan(8)
lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8) blkdeacti-
vate(8) lvmdump(8)
dmeventd(8) lvmetad(8) lvmpolld(8) lvmlockd(8) lvmlockctl(8) clvmd(8)
cmirrord(8) lvmdbusd(8)
lvmsystemid(7) lvmreport(7) lvmraid(7) lvmthin(7) lvmcache(7)
Red Hat, Inc. LVM TOOLS 2.02.187(2)-RHEL7 (2020-03-24) PVCREATE(8)
Linux-Distributionen
Huschi als Linux-Admin