HP B2355-92068 Administration Manual page 542

lvreduce(1M)
NAME
lvreduce - decrease space allocation or the number of mirror copies of logical volumes
SYNOPSIS
/usr/sbin/lvreduce
/usr/sbin/lvreduce
/usr/sbin/lvreduce
/usr/sbin/lvreduce
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.
lvreduce
DESCRIPTION
The
lvreduce
lv_path. The excess physical extents in the logical volume and any mirror copies are deallocated.
Alternatively, it reduces the number of mirror copies in the logical volume. The physical extents that
comprise the deleted mirror copy or copies are deallocated. If pv_path... is specified, the mirror or mirrors
to be removed will be deallocated from those specific physical volumes.
lvreduce
Options and Arguments
The option and pv_path argument are only meaningful if the optional HP MirrorDisk/UX software has
-m
been installed on the system.
l
lvreduce
lv_path
pv_path
autobackup
-A
-f
le_number
-l
-L lv_size
542 Hewlett-Packard Company
[ -A autobackup] [
[ autobackup] [
-A
[ autobackup]
-A
[ autobackup]
-A
cannot be performed if the volume group is activated in shared mode.
command reduces the number of logical extents allocated to a logical volume specified by
asks for confirmation before deallocating logical extents if the
recognizes the following options and arguments:
The block device path name of a logical volume.
The block device path name of a physical volume.
Set automatic backup for invocation of this command. autobackup can have one
of the following values:
Automatically back up configuration changes made to the logical volume.
y
This is the default.
After this command executes, the
vgcfgbackup(1M)) is executed for the volume group to which the logical
volume belongs.
n Do not back up configuration changes.
Force reduction of the number of logical extents without first requesting
confirmation.
This option can be dangerous when there is a file system on the lv_path that is
larger than the size that the logical volume is being reduced to. If the file sys-
tem is unmounted, the
without reducing the file system. The file system becomes corrupt and is not
mountable. If the file system is mounted,
mounted file system from becoming corrupted.
Decrease the space allocated to the logical volume, specified in logical extents.
le_number is a decimal value smaller than the current number of logical extents,
in the range
1
One, and only one,
Decrease the space allocated to the logical volume, specified in megabytes.
lv_size is a decimal value smaller than the current logical volume size, in the
range to
1 16776960
nearest multiple of the logical extent size, equivalent to the physical extent size
defined for the volume group by the
-f ] -l le_number lv_path
] lv_size lv_path
-f -L
mirror_copies lv_path [pv_path ...]
-m
mirror_copies lv_path
-k -m
option forces the reduction of the logical volume
-f
to (the implementation limit).
65535
, , or option must be supplied.
-l -L -m
(the implementation limit). lv_size is rounded up to the
vgcreate
− 1 −
HP-UX 11i Version 2: December 2007 Update
lvreduce(1M)
option is omitted.
-f
command (see
vgcfgbackup
fails, preventing a
lvreduce
command (see vgcreate (1M)).