VERITAS Volume Manager 4.1 Administrator's Guide

Understanding VERITAS Volume Manager
Hot-Relocation
Chapter 1 61
Hot-Relocation
NOTE You may need an additional license to use this feature.
Hot-relocation is a feature that allows a system to react automatically to
I/O failures on redundant objects (mirrored or RAID-5 volumes) in VxVM
and restore redundancy and access to those objects. VxVM detects I/O
failures on objects and relocates the affected subdisks. The subdisks are
relocated to disks designated as spare disks and/or free space within the
disk group. VxVM then reconstructs the objects that existed before the
failure and makes them accessible again.
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. Existing volumes on the unaffected portions of the disk remain
accessible. For further details, see Chapter 9, “Administering
Hot-Relocation,” on page 325.