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 lvextend(1M)							lvextend(1M)




 NAME
      lvextend - increase space, increase mirrors for LVM logical volume

 SYNOPSIS
      /usr/sbin/lvextend [-A autobackup]
	   {-l le_number | -L lv_size | -m mirror_copies} lv_path
	   [pv_path ... | pvg_name ...]

    Remarks
      Mirrored disk operations require the installation of the optional HP
      MirrorDisk/UX software, which is not included in the standard HP-UX
      operating system.

      lvextend cannot be performed if the volume group is activated in shared
      mode.

      Existing logical volumes that were created using the striped option are
      not supported in shared mode.

 DESCRIPTION
      The lvextend command can increase a logical volume's allocated
      extents, or increase its number of mirrored copies.

      Other logical volume characteristics can be modified with the lvchange
      and lvreduce commands (see lvchange(1M) and lvreduce(1M)).

      To limit the allocation to specific physical volumes, specify the
      physical volume names as pv_path arguments or specify the physical
      volume group names as pvg_name arguments.	 Otherwise, all of the
      physical volumes in a volume group are available for allocating new
      physical extents.	 LVM always ensures that physical extent allocation
      can satisfy the current allocation policy or policies.  If a physical
      volume is not suitable for use with a certain allocation policy, it is
      not used during physical extent allocation, even it is specified in a
      pv_path argument or indirectly in a pvg_name argument.

      LVM striped logical volumes are always allocated using a strict
      allocation policy. Consequently, striped logical volumes may only be
      extended by a number extents that is a multiple of disks the logical
      volume is striped across.	 For example, for a logical volume striped
      across 3 disks, the logical volume will be extended in increments of 3
      extents, with each of the 3 extents allocated on a different disk in
      the volume group.

      The pvg_name argument is allowed only if one of the allocation
      policies of the logical volume is PVG-strict.

    Options and Arguments
      The -m option is only meaningful if the optional HP MirrorDisk/UX
      software has been installed on the system.




 Hewlett-Packard Company	    - 1 -   HP-UX Release 11i: November 2000






 lvextend(1M)							lvextend(1M)




      lvextend recognizes the following options and arguments:

	   lv_path		    The block device path name of a logical
				    volume.

	   pv_path		    The block device path name of a physical
				    volume.

	   pvg_name		    The name of a physical volume group (see
				    lvmpvg(4)).

	   -A autobackup	    Set automatic backup for this invocation
				    of this command.  autobackup can have
				    one of the following values:

				    y	 Automatically back up configuration
					 changes made to the logical volume.
					 This is the default.

					 After this command executes, the
					 vgcfgbackup command (see
					 vgcfgbackup(1M)) is executed for
					 the volume group to which the
					 logical volume belongs.

				    n	 Do not back up configuration
					 changes this time.

	   -l le_number		    Increase the space allocated to the
				    logical volume, specified in logical
				    extents.  le_number is a decimal value
				    greater than the current number of
				    logical extents, in the range 1 to 65535
				    (the implementation limit).

				    One, and only one, -l, -L, or -m option
				    must be supplied.

	   -L lv_size		    Increase the space allocated to the
				    logical volume, specified in megabytes.
				    lv_size is a decimal value greater than
				    the current logical volume size, in the
				    range 1 to 16777216 (the implementation
				    limit).  lv_size is rounded up to the
				    nearest multiple of the logical extent
				    size, equivalent to the physical extent
				    size defined for the volume group by the
				    vgcreate command (see vgcreate(1M)).

				    One, and only one, -l, -L, or -m option
				    must be specified.



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 lvextend(1M)							lvextend(1M)




	   -m mirror_copies	    Set the number of mirror copies
				    allocated for each logical extent.	A
				    mirror copy contains the same data as
				    the original.  mirror_copies can have
				    the value 1 or 2.  It must be greater
				    than the current value.

				    Data in the new copies is synchronized.
				    The synchronization process can be time
				    consuming, depending on hardware
				    characteristics and the amount of data.

				    One, and only one, -l, -L, or -m option
				    must be specified.

 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
      Increase the number of the logical extents of a logical volume to 100:

	   lvextend -l 100 /dev/vg01/lvol3

      Increase the logical volume size to 400 MB:

	   lvextend -L 400 /dev/vg01/lvol4

      Allocate two mirrors (that is, two copies of the original) for each
      logical extent of a logical volume:

	   lvextend -m 2 /dev/vg01/lvol5

      Mirror a logical volume onto a particular physical volume.

	   lvextend -m 1 /dev/vg00/lvol3 /dev/dsk/c0t3d0

      Increase the size of a file system existing on a logical volume.

	   First, increase the size of the logical volume.

		lvextend -L 400 /dev/vg06/lvol3

	   Unmount the file system.





 Hewlett-Packard Company	    - 3 -   HP-UX Release 11i: November 2000






 lvextend(1M)							lvextend(1M)




		umount /dev/vg06/lvol3

	   Extend the file system to occupy the entire (larger) logical volume.

		extendfs /dev/vg06/rlvol3

	   Remount the file system.

		mount /dev/vg06/lvol3 /mnt

 SEE ALSO
      lvchange(1M), lvcreate(1M), lvdisplay(1M), lvreduce(1M), pvchange(1M),
      pvdisplay(1M).









































 Hewlett-Packard Company	    - 4 -   HP-UX Release 11i: November 2000