Changing the write-cache mode on a logical
- This action is supported in bootable-CD mode for ServeRAID SCSI
- This action is supported in interactive mode on the ServeRAID-8i, -8k, -8s,
and -7t controllers only.
- This action is not supported on the integrated
Use this action to change the write-cache mode setting of a logical drive to
write through or write back. The write-cache mode determines if the controller
writes data to the drive before or after sending a confirmation to the operating
- (RAID level-x0 only) All logical drives in a spanned array must be
either write back or write through. That is, the write-cache mode settings
for the logical drives in the spanned array cannot be a mixture of
write back and write through.
- (Failover environment only) A fault-tolerant controller pairing must be
configured as write through. This is because the logical drives are
configured as "Shared." For more information, refer to the IBM ServeRAID User's Reference.
- (Cluster environment only) If the logical drives are configured as
"Shared," the controllers must be configured as write through. For more
information, refer to the IBM ServeRAID
- In the Logical devices view, click(logical drive).
- Right-click Change write-cache mode to write back or write through.
- If you click write back and you do not have a battery-backup cache,
click Yes to confirm your choice because there is a risk of losing
If you click write back and you do have a battery-backup
cache, the ServeRAID Manager changes the mode.
If you click write
through, the ServeRAID Manager changes the mode.