IBM 866011U - Netfinity 5500 - 8660, Hardware Maintenance Manual

Page: 139 / 402

Note
You can use the Administration and
Monitoring utility program to identify a
defunct drive and designate a replacement
drive without restarting the server. Review
the information in “Understanding the drive
rebuild process” on page 131; then, see
“Using the Administration and Monitoring
Utility Program” on page 26 for more
information.
Understanding the drive rebuild process:
This
section contains guidelines and instructions for rebuilding a
defunct (DDD) drive using the ServeRAID Configuration
program.
If you are using the Administration and Monitoring utility
program, review the guidelines and information in this
section; then, see “Physical device administration” on
page 42 for instructions.
Automatic rebuild process:
The ServeRAID
controller will rebuild a defunct drive automatically when all
of the following conditions exist:
Ÿ
The physical drive that failed is part of a RAID level 1
or 5 logical drive.
Ÿ
A HSP or SHS drive with a capacity equal to or
greater than the original drive is available the moment
that the drive fails.
Ÿ
No rebuild, synchronization, or RAID level change
operation is in progress.
If multiple hot-spare drives are available, the ServeRAID
controller searches all bays for a hot-spare drive of the
appropriate size. The first drive that meets this
requirement enters the rebuild state.
A physical hard disk drive can enter the rebuild (RBL) state
if:
Ÿ
You physically replace a defunct drive that is part of
the critical (CRT) logical drive.
When you physically replace a defunct drive in a
critical (CRT) logical drive, the ServeRAID controller
rebuilds the data on the new physical drive
before it
changes the logical drive state back to Okay (OKY).
Ÿ
The ServeRAID controller adds a hot-spare or a
standby hot-spare drive to the array and changes its
state from HSP or SHS to RBL.
Ÿ
A ready or standby drive replaces a defunct drive that
is part of the critical (CRT) logical drive.
Guidelines for Rebuilding a Drive
Before you rebuild a drive, review the following guidelines:
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