LVM Volume Group Dynamic LUN Expansion (DLE) and Contraction (DLC) (September 2009)

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# pvdisplay /dev/disk/disk4154

--- Physical volumes ---

PV Name /dev/disk/disk4154

VG Name /dev/vg1

PV Status available

Allocatable yes

VGDA 2

Cur LV 1

PE Size (Mbytes) 16

Total PE 19199

Free PE 0

Allocated PE 19199

Stale PE 0

IO Timeout (Seconds) default

Autoswitch On

Proactive Polling On

# diskinfo /dev/rdisk/disk4154

SCSI describe of /dev/rdisk/disk4154:

vendor: HP

product id: OPEN-V

type: direct access

size: 314572800 Kbytes

bytes per sector: 512

The max_PE per PV for this volume group is 30000.

2. Run vgmodify in table mode as follows:

# vgmodify -t vg1

Current Volume Group settings:

Max LV 255

Max PV 50

Max PE per PV 30000

PE Size (Mbytes) 16

VGRA Size (Kbytes) 12208

VGRA space (Kbytes) without PE renumbering 12224

VGRA space (Kbytes) PE renumbering lower 16384

Volume Group optimized settings (no PEs renumbered):

max_pv(-p) max_pe(-e) Disk size (Mb)

50 30204 483276

51 29436 470988

52 28924 462796

The volume group max_PE per PV is 30000. The output indicates the correct size for you to

expand the disk size is about 483276 MB or 472 GB.

3. Perform the DLE operation from the device end and expand the disk to 470 GB.

4. Verify the new disk size with the diskinfo command: