Using Serviceguard Extension for RAC, 5th Edition, June 2007

Maintenance and Troubleshooting
Replacing Disks
Chapter 4226
Replacing Disks
The procedure for replacing a faulty disk mechanism depends on the
type of disk configuration you are using and on the type of Volume
Manager software. For a description of replacement procedures using
VERITAS VxVM or CVM, refer to the chapter on “Administering
Hot-Relocation” in the VERITAS Volume Manager Administrator’s
Guide. Additional information is found in the VERITAS Volume
Manager Troubleshooting Guide.
The following paragraphs describe how to replace disks that are
configured with LVM. Separate descriptions are provided for replacing a
disk in an array and replacing a disk in a high availability enclosure.
For more information, see When Good Disks Go Bad, posted at
http://docs.hp.com
Replacing a Mechanism in a Disk Array Configured
with LVM
With any HA disk array configured in RAID 1 or RAID 5, refer to the
array’s documentation for instruction on how to replace a faulty
mechanism. After the replacement, the device itself automatically
rebuilds the missing data on the new disk. No LVM activity is needed.
This process is known as hot swapping the disk.
NOTE If your LVM installation requires online replacement of disk
mechanisms, the use of disk arrays may be required, because software
mirroring of JBODs with MirrorDisk/UX does not permit hot swapping
for disks that are activated in shared mode.