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NetBSD 6.1.5 - man page for pvcreate (netbsd section 8)

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PVCREATE(8)									      PVCREATE(8)

NAME
       pvcreate - initialize a disk or partition for use by LVM

SYNOPSIS
       pvcreate   [-d|--debug]	 [-f[f]|--force  [--force]]  [-y|--yes]  [-h|--help]  [-t|--test]
       [-v|--verbose] [--labelsector] [-M|--metadatatypetype] [--metadatacopies#copies]  [--meta-
       datasizesize]  [--restorefilefile]  [--setphysicalvolumesizesize]  [-u|--uuiduuid] [--ver-
       sion] [-Z|--zeroy|n] PhysicalVolume [PhysicalVolume...]

DESCRIPTION
       pvcreate initializes PhysicalVolume for later use by the  Logical  Volume  Manager  (LVM).
       Each  PhysicalVolume  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 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

       Continue  with  vgcreate(8) to create a new volume group on PhysicalVolume, or vgextend(8)
       to add PhysicalVolume to an existing volume group.

OPTIONS
       See lvm(8) for common options.

       -f, --force
	      Force the creation without any confirmation.  You can not recreate (reinitialize) a
	      physical	volume	belonging  to  an existing volume group.  In an emergency you can
	      override this behaviour with -ff.

       -u, --uuid uuid
	      Specify the uuid for the device.	Without this option, pvcreate generates a  random
	      uuid.   All  of your physical volumes must have unique uuids.  You need to use this
	      option before restoring a backup of LVM metadata onto a replacement  device  -  see
	      vgcfgrestore(8).

       -y, --yes
	      Answer yes to all questions.

       -Z, --zero y|n
	      Whether  or not the first 4 sectors (2048 bytes) of the device should be wiped.  If
	      this option is not given, the default is to wipe these  sectors  unless  either  or
	      both of the --restorefile or --uuid options were specified.

NEW METADATA OPTIONS
       LVM2  introduces a new format for storing metadata on disk.  This new format is more effi-
       cient and resilient than the format the original  version  of  LVM  used  and  offers  the
       advanced user greater flexibility and control.

       The  new format may be selected on the command line with -M2 or by setting format = "lvm2"
       in the global section of lvm.conf.  Each physical volume in the same volume group must use
       the same format, but different volume groups on a machine may use different formats simul-
       taneously: the tools can handle both formats.  Additional formats can be added  as  shared
       libraries.

       Additional  tools for manipulating the locations and sizes of metadata areas will be writ-
       ten in due course.  Use the verbose/debug options on the tools to see where  the  metadata
       areas are placed.

       --metadatasize size
	      The  approximate amount of space to be set aside for each metadata area.	(The size
	      you specify may get rounded.)

       --metadatacopies copies
	      The number of metadata areas to set aside on each PV.  Currently this can be  0,	1
	      or 2.  If set to 2, two copies of the volume group metadata are held on the PV, one
	      at the front of the PV and one at the end.  If set to 1 (the default), one copy  is
	      kept  at	the front of the PV (starting in the 5th sector).  If set to 0, no copies
	      are kept on this PV - you might wish to use this with VGs containing large  numbers
	      of PVs.  But if you do this and then later use vgsplit you must ensure that each VG
	      is still going to have a suitable number of copies of the metadata after the split!

       --restorefile file
	      In conjunction with --uuid, this extracts the location and size of the data on  the
	      PV  from	the file (produced by vgcfgbackup) and ensures that the metadata that the
	      program produces is consistent with the contents of  the	file  i.e.  the  physical
	      extents  will  be  in the same place and not get overwritten by new metadata.  This
	      provides a mechanism to upgrade the  metadata  format  or  to  add/remove  metadata
	      areas. Use with care. See also vgconvert(8).

       --labelsector sector
	      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.

       --setphysicalvolumesize size
	      Overrides the automatically-detected size of the PV.  Use with care.

Example
       Initialize  partition  #4  on the third SCSI disk and the entire fifth SCSI disk for later
       use by LVM:

       pvcreate /dev/sdc4 /dev/sde

SEE ALSO
       lvm(8), vgcreate(8), vgextend(8), lvcreate(8), cfdisk(8), fdisk(8), losetup(8),	mdadm(8),
       vgcfgrestore(8), vgconvert(8)

Sistina Software UK		 LVM TOOLS 2.02.44-cvs (02-17-09)		      PVCREATE(8)
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