Replacing A Failed Mirrored Disk - HP NetServer AA 4000 Administrator's Manual

Chapter 9

Replacing a Failed Mirrored Disk

Warning: If the failed disk is the source of a mirror copy, do not implement
this procedure until completing all precautions to save data from
this disk.
Often disks can be replaced within a RAID system with no need for special considerations at all.
Caution: Before proceeding, make sure you are properly grounded using, for instance, a
wrist strap with an attached alligator clip that is connected to an appropriate
ground.
To replace a failed mirrored disk for a mirror set with local hardware redundancy and in which
the other mirrored disk is active:
Step Action
1 Acquire a replacement disk that is equal to
or larger in size than the failed disk.
2 Shut down the IOP that contains the failed
disk.
3 Remove the failed disk.
4 Install the replacement disk following the
manufacturer's instructions.
5 Reboot the IOP in Offline Endurance
I/O Processor Mode.
6 Using the Windows NT Disk
Administrator, partition the replacement
disk, as described in the next table.
236
Notes
The replacement disk must be of the same SCSI
variety as the failed disk; for example, the old and
new disks must both be narrow or both wide. This
release does not support disk replacement with disks
of a different SCSI variety.
Logical disks on RAID configurations are an
exception. The RAID subsystem masks any physical
disk attributes from Windows NT.
Follow the procedure on page
When removing the failed disk, carefully handle and
store this disk (as if it were a new disk) until the
replacement disk is installed and is fully operational.
Do not modify any SCSI BIOS settings. Your
system must maintain the SCSI BIOS settings
selected during initial server installation.
Maintenance
210.