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 pvcreate(1M)							pvcreate(1M)




 NAME
      pvcreate - create physical volume for use in LVM volume group

 SYNOPSIS
      /usr/sbin/pvcreate [-b] [-B] [-d soft_defects] [-s disk_size] [-f]
	   [-t disk_type] pv_path

 DESCRIPTION
      The pvcreate command initializes a direct access storage device (a raw
      disk device) for use as a physical volume in a volume group.

      If pv_path contains a file system and the -f option is not specified,
      pvcreate asks for confirmation.  The request for confirmation avoids
      accidentally deleting a file system.

      Furthermore, when the -f option is not specified, the operation is
      denied if pv_path already belongs to another volume group, or the
      pv_path refers to a disk device under the control of the VERITAS
      Volume Manager.

      After using pvcreate to create a physical volume, use vgcreate to add
      it to a new volume group or vgextend to add it to an existing volume
      group (see vgcreate(1M) and vgextend(1M)).

      Disks cannot be added to a volume group until they are properly
      initialized by pvcreate.

      pv_path can be made into a bootable disk by specifying the -B option,
      which reserves space on the physical volume for boot-related data.
      This is a prerequisite for creating root volumes on logical volumes.
      Refer to mkboot(1M) and lif(4) for more information.

    Options and Arguments
      pvcreate recognizes the following options and arguments:

	   pv_path	       The character (raw) device path name of a
			       physical volume.

	   -b		       Read from standard input the numbers that
			       correspond to the indexes of all known bad
			       blocks on the physical volume, pv_path, that
			       is being created.  Specify the indexes using
			       decimal, octal, or hexadecimal numbers in
			       standard C-language notation, with numbers
			       separated by newline, tab, or formfeed
			       characters.  If this option is not used,
			       pvcreate assumes that the physical volume
			       contains no bad blocks.

	   -B		       Make a bootable physical volume (i.e., a
			       system disk).



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 pvcreate(1M)							pvcreate(1M)




			       Note: The -B option is not supported on HP-UX
			       11i Version 1.5.

	   -d soft_defects     Specify the minimum number of bad blocks that
			       LVM should reserve in order to perform
			       software bad block relocation.  This number
			       can be no larger than 7039.  If not
			       specified, one block is reserved for each 8K
			       of data blocks.

	   -s disk_size	       Effective size of the physical volume to be
			       created, specified in number of physical
			       sectors.

	   -f		       Force the creation of a physical volume (thus
			       deleting any file system or volume manager
			       information present) without first requesting
			       confirmation.

			       Warning: The -f option should only be used as
			       a last resort to over write file system or
			       volume manager information that cannot
			       properly be removed using the commands
			       designed for that purpose.  When invoked with
			       -f, the command does minimal verification, so
			       care should be taken to assure that the disk
			       is not already in use prior to invoking the
			       command.

	   -t disk_type	       Retrieve configuration information about the
			       physical volume from the file /etc/disktab.
			       disk_type specifies the device (for example,
			       hp7959S).

			       The disk_type only needs to be specified when
			       pvcreate fails to get the size from the
			       underlying disk driver.	If the driver
			       successfully returns the size of the device,
			       disk_type is ignored.

 EXTERNAL INFLUENCES
    Environment Variables
      LANG determines the language in which messages are displayed.

      If LANG is not specified or is null, it defaults to "C" (see lang(5)).

      If any internationalization variable contains an invalid setting, all
      internationalization variables default to "C" (see environ(5)).

 EXAMPLES
      Create a physical volume on raw device /dev/rdsk/c1t0d0, and force the



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 pvcreate(1M)							pvcreate(1M)




      creation without confirmation:

	   pvcreate -f /dev/rdsk/c1t0d0

      Create a physical volume on raw device /dev/rdsk/c1t0d0, specifying
      that a bad blocks list (7, 13, 95, and 133) must be read from standard
      input:

	   echo 7 13 95 133 | pvcreate -b /dev/rdsk/c1t0d0

 WARNINGS
      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 option when creating the physical
      volume.

      The -B option is not supported on HP-UX 11i Version 1.5.

 FILES
      /etc/disktab	  Disk geometry and disk partition characteristics
			  for all disk devices on the system

 SEE ALSO
      mkboot(1M), vgcreate(1M), vgextend(1M), lif(4).






























 Hewlett-Packard Company	    - 3 -      HP-UX 11i Version 1: Aug 2001