IBM 86601RU Hardware Maintenance Manual - Page 139

Understanding the drive rebuild process, Automatic rebuild process, Guidelines for Rebuilding a Drive

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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: The physical drive that failed is part of a RAID level 1 or 5 logical drive. A HSP or SHS drive with a capacity equal to or greater than the original drive is available the moment that the drive fails. 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: 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). 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. 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: Netfinity 5500 - Type 8660 131

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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:
±
The physical drive that failed is part of a RAID level 1
or 5 logical drive.
±
A HSP or SHS drive with a capacity equal to or
greater than the original drive is available the moment
that the drive fails.
±
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:
±
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).
±
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.
±
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:
Netfinity 5500 - Type 8660
131