Index for Section 8

Alphabetical listing for P

pvcreate(8)
NAME
  pvcreate - Creates a physical volume that can be used as part of a volume
  group

SYNOPSIS
  /usr/sbin/pvcreate [-bf] [-t DiskType] PhysicalVolumePath

DESCRIPTION
				     Note

       This command is no longer supported on Digital UNIX systems.
       Features formerly provided by the Logical Volume Manager (LVM)
       are now provided by the Logical Storage Manager (LSM).  Existing
       LVM volumes must be migrated to LSM, using an encapsulation
       process.	 For information about moving LVM volumes to LSM, see
       the vollvmencap(8) reference page and the manual Logical Storage
       Manager.


  The pvcreate command initializes a direct access storage device (a raw
  block device) for use as a physical volume in a volume group.	 The
  PhysicalVolumePath parameter specifies the pathname of the raw device to be
  used.

  If PhysicalVolumePath contains a file system, you are asked for
  confirmation if your command entry does not include the -f flag.  The
  request for confirmation avoids the accidental deletion of a file system.
  Currently, BSD and System V file systems are recognized.

  The operation is denied if PhysicalVolumePath belongs to another volume
  group.  Only physical volumes not belonging to other volume groups can be
  created.

  If PhysicalVolumePath contains a disk label, it is updated to reflect that
  PhysicalVolumePath is now a physical volume that can be installed in a
  volume group.

  After you create a physical volume with the pvcreate command, you can add
  it to a new volume group with the vgcreate command, or to an existing
  volume group with the vgextend command.

  You can not add a raw device to a volume group if it has not been
  initialized with the pvcreate command.

FLAGS
  -b	    Used to specify (on standard input) the numbers that correspond
	    to the indexes of all known bad blocks on the physical volume,
	    PhysicalVolumePath, that you are creating.	Specify the indexes
	    with decimal, octal, or hexadecimal numbers using the C language
	    conventional formats; use the newline, tab, or formfeed character
	    to separate each number.  If you do not use this flag, it is
	    presumed that the physical volume contains no bad blocks.

  -f	    Forces the creation of a physical volume (thus deleting any file
	    system present) without first requesting confirmation.  Currently
	    BSD and System V file systems are recognized.

  -t DiskType
	    Used to retrieve configuration information about the physical
	    volume from the /etc/disktab file.	Specify the device (rz23, for
	    example) with the DiskType parameter.

	    NOTE: If the physical volume does not contain any disklabel, the
	    command will complain. The command must then be executed one more
	    time with this flag set.

NOTES
  We strongly recommend that you check the manufacturer's listing, or run
  diagnostics testing for bad blocks on the device prior to creating a
  physical volume.  If bad blocks are present, use the -b flag when creating
  the physical volume.

  The Logical Volume Manager (LVM) subsystem supports only one physical
  volume per disk; that is, only one partition on a disk unit can be
  allocated for LVM use.  Also, the boot disk should not contain an LVM
  physical volume.

EXAMPLES
  This section contains Digital device-specific examples.

   1.  To create a physical volume on the raw device /dev/rrz1c that contains
       a disklabel, and to force the creation without confirmation, enter:
	    pvcreate -f /dev/rrz1c

   2.  To create a physical volume on the raw device /dev/rrz1c that does not
       contain a disklabel, and to get confirmation by default, enter:
	    pvcreate -t rz23 /dev/rrz1c

   3.  To create a physical volume on the raw device /dev/rrz1c, specifying
       that a bad blocks list (7 13 95 133) must be read from standard input,
       enter:
	    echo 7 13 95 133 | pvcreate -b /dev/rrz1c

FILES
  /usr/sbin/pvcreate
	    Specifies the command path

  /etc/disktab
	    Specifies the database containing the disk geometry and disk
	    partition characteristics for all disk devices on the system

RELATED INFORMATION
  Commands:  echo(1), pvchange(8), pvdisplay(8), pvmove(8), vgcreate(8),
  vgextend(8)