VERITAS Volume Manager 3.5 User's Guide - VERITAS Enterprise Administrator (September 2004)

Disk Tasks

Commands for Hot Relocation

Chapter 382

When a partial disk failure occurs (that is, a failure affecting only some

subdisks on a disk), redundant data on the failed portion of the disk is

relocated and the existing volumes comprised of the unaffected portions

of the disk remain accessible.

When selecting space for relocation, hot relocation preserves the

redundancy characteristics of the Volume Manager object that the

relocated subdisk belongs to. For example, hot relocation ensures that

subdisks from a failed plex are not relocated to a disk containing a

mirror of the failed plex. If redundancy cannot be preserved using any

available spare disks or free space, hot-relocation does not take place. If

relocation is not possible, the system administrator is notiﬁed and no

further action is taken.

When hot relocation takes place, the failed subdisk is removed from the

conﬁguration database and Volume Manager takes precautions to ensure

that the disk space used by the failed subdisk is not recycled as free

space.