HP-UX Reference (11i v3 07/02) - 1M System Administration Commands A-M (vol 3)

l
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.
DESCRIPTION
The lvextend command can increase a logical volume’s allocated extents, or increase its number of mir-
rored 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 argu-
ments 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 phy-
sical extent allocation can satisfy the current allocation policy or policies. If a physical volume is not suit-
able 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.
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.
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.
-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.
476 Hewlett-Packard Company − 1 − HP-UX 11i Version 3: February 2007