(Startable-CD mode only.)
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 hard disk drive before or after sending a confirmation to the operating system.
Note: If you configure a fault-tolerant pair of controllers, the controllers must be configured as write through. If you have the battery-backup option, it is disabled when you create a fault-tolerant pair. The write-cache mode is changed automatically from write-back mode to write-through mode. For more information, refer to the IBM Netfinity ServeRAID-4H Ultra160 SCSI Controller User's Reference.
Understanding write-back and write-through modes