IBM Netfinity ServeRAID-4H Ultra160, User Reference

Page: 140 / 192

Message Explanation Action
Battery-backup
cache
replacement The ServeRAID controller detects
that the battery-backup cache is
defective. Press F8 if you replaced the battery-backup cache, or press
F10 if you have not replaced the battery-backup cache.
Configured drives
are missing. When the ServeRAID controller
detects that a previously configured
drive is missing, the following
message appears:
x Online drives not responding
where x is the number of drives not
responding.
Example of a possible message:
Online Drive on Channel 3 SCSI
ID 3 is not responding.
Press one of the following keys:
F2 Detailed description. Press this key for a detailed
description of the problem, such as the example
message above.
F4 Retry. Press this key after correcting a problem. For
example, press F4 after you turn on the external
storage enclosure that contains the physical drive.
F5 Change the configuration and set the drives to
defunct. Press this key to accept the new state that
the ServeRAID controller will assign to the drive.
For example, the ServeRAID controller will assign
the drive a state of defunct or empty.
You can also press F5 when you must remove a
drive. RAID level-1 and RAID level-5 logical drives
are present, and performance in a degraded mode
is acceptable. The ServeRAID controller will assign
the drive a state of defunct, but the server can
complete startup. However, the array will remain in
Critical mode and the potential for data loss will
exist until you replace and rebuild the defunct drive.
To prevent the loss of data, replace and rebuild the
defunct drive in a timely manner.
Note: A physical drive in the defunct state does not
necessarily mean that you need to replace the
drive. Before you replace the drive, ensure that:
1. All cables are connected properly to the
backplane and to the physical drive. Also,
ensure that all cables inside the server are
connected properly.
2. The hot-swap drive trays are seated properly in
the drive bay.
3. If you are certain the physical drive is not
defective, try rebuilding the drive if you have not
already done so. See “Rebuilding a defunct
drive” on page 136 for more information.
After you perform these steps, if the physical drive
does not function properly, replace the drive.
F10 Continue starting without changing the
configuration. Press this key to continue without
change to the configuration.
126
IBM
®
Netfinity
®
User’s Reference: ServeRAID
™
-4H Ultra160 SCSI Controller