VERITAS Volume Manager 4.1 Administrator's Guide

Administering Hot-Relocation
How Hot-Relocation works
Chapter 9330
Figure 9-1, “Example of Hot-Relocation for a Subdisk in a RAID-5
Volume,” illustrates the hot-relocation process in the case of the failure of
a single subdisk of a RAID-5 volume.
Figure 9-1 Example of Hot-Relocation for a Subdisk in a RAID-5 Volume
disk01 disk02 disk03 disk04 disk05
disk01 disk02 disk03 disk04 disk05
disk01-01 disk02-01
disk02-02
disk03-01
disk03-02
disk05-01
disk04-01
disk01-01 disk02-01
disk02-02
disk03-01
disk03-02
disk04-01
X
Spare Disk
disk01 disk02 disk03 disk04 disk05
disk05-01disk01-01 disk02-01
disk02-02
disk03-01
disk03-02
disk04-01
X
a) Disk group contains five disks. Two RAID-5 volumes are configured across four of the disks.
b) Subdisk disk02-01 in one RAID-5 volume fails. Hot-relocation replaces it with subdisk disk05-01
c) RAID-5 recovery recreates subdisk disk02-01’s data and parity on subdisk disk05-01 from
One spare disk is available for hot-relocation.
the data and parity information remaining on subdisks disk01-01 and disk03-01.
that it has created on the spare disk, and then initiates recovery of the RAID-5 volume.