HP-UX 11i v3 LVM New Features in HP-UX 11i v3 (September 2009)

Maximum Logical Volume Size Increased up to 16TB

LVM in HP-UX 11i v3 release supports logical volume of sizes up to 16 terabyte (TB) (versus 2TB in earlier

logical volume sizes must be a multiple of the extent size. Extent size is expressed in units of megabytes

(MB) in the range of 1 to 256 and number of extents per logical volume is a decimal value in the range of 1 to

ts and 256MB extent size has the maximum supported size (16TB

The following are the advantages of 16TB logical volumes:

• These logical volumes can be mirrored, striped, or striped and mirrored.

Existing logical volumes using 256MB extents that are 2TB or less can be extended up to 16TB.

Note: For the logical volumes to extend up to 16TB, physical volumes in volume group must have sufficient LVM

olume Group Dynamic

Increased Limi

releases).

In LVM,

65535. Thus a logical volume with 65535 exten

– 256MB).

• These logical volumes offer better scalability.

• These logical volumes are supported in standalone, Shared LVM, and exclusive mode.

configuration space on the disk. To increase the LVM configuration space, see the LVM V

LUN expansion (DLE)/vgmodify whitepaper.

Compatibility Note

e. If a volume group

larger than 2TB is created on HP-UX 11i v3, its activation and use is not recommended on any

previous HP-UX release. Though the volume group can be activated and used on earlier releases, the data beyond

2TB is inaccessible.

2 with patches

tches installed on a

an be successfully

With the March and September 2008 releases of HP-UX 11i v3, LVM supports two new versions of volume group,

Version 2.0 and Version 2.1 respectively. These new versions support configuration of larger number volume

groups, logical volumes, physical volumes, and several other volume group parameters. For more information on

the supported limits of Version 1.0 and Version 2.

volume groups, see the LVM Limits White Paper

Releases prior to HP-UX 11i v3 can only access data within the first 2TB of a logical volum

with logical volume

NOTE: Logical volume with size greater than 2TB and up to 16TB is supported on HP-UX 11i v

PHCO_36744, PHKL_36745, and PHCO_36746. With these three patches or superseding pa

HP-UX 11i v2 system, a volume group with such a logical volume created on HP-UX 11i v3 c

imported and activated.

Increased Limits for Version 2.x Volume Group

HP MirrorDisk/UX software is supported in a clustered environment with a maximum of two nodes configured for

volume group version 1.0 and 2.0. For volume group versions 2.1, HP MirrorDisk/UX software is supported in a

clustered environment with a maximum of sixteen nodes configured.