Vdisks

Vdisks are created across the pdisks within a declustered array. Each recovery group requires a special log home vdisk to function (along with other log-type vdisks, as appropriate for specific environments); see Log vdisks. All other vdisks are created for use as GPFS file system NSDs.

A recovery group can contain at most 512 vdisks including log vdisks. Vdisks can be allocated arbitrarily among declustered arrays. Vdisks are created with the mmcrvdisk command. The mmdelvdisk command destroys vdisks and all their contained data.

When creating a vdisk, you must specify the RAID code, block size, vdisk size, and a name that is unique within the recovery group and the GPFS cluster. There are no adjustable parameters available for vdisks.