LVCHANGE(8)						      System Manager's Manual						       LVCHANGE(8)

NAME

       lvchange - change attributes of a logical volume

SYNOPSIS

       lvchange  [-A|--autobackup  {y|n}]  [-a|--available  {y|n}]  [-C|--contiguous  {y|n}]  [-d|--debug]  [-h|--help]  [-p|--permission  {r|rw}]
       [-r|--readahead ReadAheadSectors] [-v/--verbose] LogicalVolumePath [LogicalVolumePath...]

DESCRIPTION

       lvchange allows you to change the attributes of a logical volume.

   OPTIONS
       -A, --autobackup y/n
	      Controls automatic backup of VG metadata after the change ( see vgcfgbackup(8) ). Default is yes.

       -a, --available y/n
	      Controls the availability of the logical volumes for use.  This is (among others) useful for changing the logical  volume's  name  (
	      see lvrename(8) ) safely.

       -C, --contiguous y/n
	      Tries  to  set or resets the contiguous allocation policy for logical volumes. It's only possible to change a non-contiguous logical
	      volume's allocation policy to contiguous, if all of the allocated physical extents are already contiguous.

       -d, --debug
	      Enables additional debugging output (if compiled with DEBUG).

       -h, --help
	      Print a usage message on standard output and exit successfully.

       -p, --permission r/w
	      Change access permission to read-only or read/write.

       -r, --readahead ReadAheadSectors
	      Change read ahead sector count per logical between 2 and 120.

       -v, --verbose
	      Gives verbose runtime information about lvchange's activities.

Examples
       "lvchange -x n /dev/vg00/lvol1" prevents the allocation of any physical extents on logical volume lvol1 in volume group vg00.

DIAGNOSTICS

       lvchange returns an exit code of 0 for success or > 0 for error:

       1  invalid logical volume name
       2  error checking existence of volume group
       3  logical volume cannot be opened
       4  logical volume access permissions cannot be set
       5  logical volume status cannot be set
       6  logical volume allocation policy cannot be set
       7  VGDA for logical volume cannot be written to the physical volumes
       8  error changing read ahead sectors

       95 driver/module not in kernel
       96 invalid I/O protocol version
       97 error locking logical volume manager
       98 invalid lvmtab (run vgscan(8))
       99 invalid command line

ENVIRONMENT VARIABLES

       LVM_AUTOBACKUP
	      If this variable is set to "no" then the automatic backup of VG metadata is disabled.

       LVM_VG_MAX_BACKUPS
	      This variable determines the backup history depth of kept VGDA copy files in /etc/lvmconf. It  can  be  set  to  a  positive  number
	      between 0 and 999.  The higher this number is, the more changes you can restore using vgcfgrestore(8).

       LVM_VG_NAME
	      The  default  Volume Group Name to use. Setting this variable enables you to enter just the Logical Volume Name rather than its com-
	      plete path.

See also
       lvm(8), lvcreate(8)

AUTHOR

       Heinz Mauelshagen <Linux-LVM@Sistina.com>

Heinz Mauelshagen						     LVM TOOLS							       LVCHANGE(8)