VERITAS Volume Manager 3.5 Installation Guide (September 2004)

Getting Started with VxVM
Using Hot-Relocation
Chapter 5
56
Using Hot-Relocation
Hot-relocation automatically restores redundancy and access to mirrored and RAID-5 volumes when a
disk fails. This is done by relocating the affected subdisks to disks designated as spares and/or free
space in the same disk group.
The hot-relocation feature is enabled by default. The associated daemon, vxrelocd, is automatically
started during system startup.
Follow these recommendations:
Step 1. Leave the Volume Manager hot-relocation feature enabled to detect disk failures automatically. It will
notify you of the nature of the failure, attempt to relocate any affected subdisks that are redundant, and
initiate recovery procedures.
Step 2. Configure at least one hot-relocation spare disk in each disk group. This will allow sufficient space for
relocation in the event of a failure.
Disabling Hot-Relocation
The hot-relocation feature is enabled by default. The associated daemon, vxrelocd, is automatically
started during system startup. If you decide to disable hot-relocation, you need to prevent vxrelocd
from running after you load the Volume Manager software.
To disable hot-relocation, you comment out the vxrelocd line in the startup file
/etc/rc2.d/S95vxvm-recover, as follows:
# nohup vxrelocd root &
Refer to the Volume Manager Administrator’s Guide for more information on hot-relocation.