Changes only the characteristics of a logical volume.
chlv [ -a Position ] [ -b BadBlocks ] [ -d Schedule ] [ -e Range ] [ -L label ] [ -p Permission ] [ -r Relocate ] [ -s Strict ] [ -t Type ] [ -u Upperbound ] [ -v Verify ] [ -w MirrorWriteConsistency ] [ -x Maximum ] LogicalVolume ...
chlv -n NewLogicalVolume LogicalVolume
Note: Changing the name of a logged logical volume requires that you run the chfs -a Logname=NewLogName on each filesystem using that log.
Attention: The name change option of this command is not allowed if the volume group is varied on in concurrent mode.
The chlv command changes the characteristics of a logical volume according to the command flags. The LogicalVolume parameter can be a logical volume name or logical volume ID. Each current characteristic for a logical volume remains in effect unless explicitly changed with the corresponding flag.
The changes you make with the -a, -e, -s, and -u flags take effect only when new partitions are allocated or partitions are deleted. The other flags take effect immediately.
To change the name of a logical volume, use the -n flag and use the NewLogicalVolume parameter to represent the new logical volume name. Do not use other flags with this syntax.
- Changes made to the logical volume are not reflected in the file systems. To change file system characteristics, use the chfs command.
- To use this command, you must either have root user authority or be a member of the system group.
You can use the Web-based System Manager Volumes application (wsm lvm fast path) run this command. You could also use the System Management Interface Tool (SMIT) smit chlv fast path to run this command.
Note: When changing the characteristics of a striped logical volume, the -d, -e, -u, and -w flags are not valid.
|-a Position|| Sets the intraphysical volume allocation policy (the position of the logical partitions on the physical volume). The Position variable is represented by one of the following:
|-b BadBlocks|| Sets the bad-block relocation policy. The BadBlocks variable is represented by one of the following:
|-d Schedule|| Sets the scheduling policy when more than one logical partition is written. The Schedule variable is represented by one of the following:
|-e Range|| Sets the interphysical volume allocation policy (the number of physical volumes to extend across, using the volumes that provide the best allocation). The value of the Range variable is limited by the Upperbound variable, set with the -u flag, and is represented by one of the following:
|-L Label||Sets the logical volume label. The maximum size of the Label variable is 127 characters.|
|-n NewLogicalVolume||Changes the name of the logical volume to that specified by the NewLogicalVolume variable. Logical volume names must be unique systemwide and can range from 1 to 15 characters.|
|-p Permission|| Sets the access permission to read-write or read-only.
The Permission variable is represented by one of the following:
|-r Relocate|| Sets the reorganization flag to allow or prevent the relocation of the logical volume during reorganization. The Relocate variable is represented by one of the following:
|-s Strict|| Determines the strict allocation policy. Copies of a logical partition can be allocated to share or not to share the same physical
volume. The Strict variable is represented by one of the following:
|-t Type||Sets the logical volume type. The maximum size is 31 characters. If the logical volume is striped, you cannot change Type to boot.|
|-u Upperbound||Sets the maximum number of physical volumes for new allocation. The value of the Upperbound variable should be between one and the total number of physical volumes.|
|-v Verify|| Sets the write-verify state for the logical volume. Causes all writes to the logical volume either to be verified with a follow-up read or not to be verified with a follow-up read.
The Verify variable is represented by one of the following:
|-x Maximum||Sets the maximum number of logical partitions that can be allocated to the logical volume. The maximum number of logical partitions per logical volume is 32,512.|
chlv -e m lv01The interphysical volume allocation policy is set to minimum.
chlv -t copy lv03
chlv -p r lv03Logical volume lv03 now has read-only permission.
chlv -t paging -u 10 lv03The change in the type of logical volume takes effect immediately, but the change in the maximum number of physical volumes does not take effect until a new allocation is made.
chlv -a e -e x -r y -s n -u 5 lv07
|/usr/sbin||Directory where chlv command resides.|
The chfs command, extendlv command, lslv command, mklv command, mklvcopy command, reorgvg command, rmlvcopy command, syncvg command.
The Logical Volume Storage Overview in AIX Version 4.3 System Management Guide: Operating System and Devices explains the Logical Volume Manager, physical volumes, logical volumes, volume groups, organization, ensuring data integrity, and allocation characteristics.
The System Management Interface Tool (SMIT): Overview in AIX Version 4.3 System Management Guide: Operating System and Devices explains the structure, main menus, and tasks that are done with SMIT.
Setting up and running Web-based System Management in AIX Version 4.3 System Management Guide: Operating System and Devices.
AIX HACMP/6000 Concepts and Facilities.