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HP-UX Reference Volume 2 of 5 > llvextend(1M) |
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NAMElvextend — 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 ...] RemarksMirrored 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. DESCRIPTIONThe 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 ArgumentsThe -m option is only meaningful if the optional HP MirrorDisk/UX software has been installed on the system. lvextend recognizes the following options and arguments:
EXTERNAL INFLUENCESEnvironment VariablesLANG 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)). EXAMPLESIncrease 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.
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