Specifications

Chapter 5 Maintenance and Service 5-13
■ SCSI Controller Canister w/Memory (RSM), part number 540-3600
■ Fiber Controller Canister w/Memory (D1000), part number 540-4026
■ Fiber Controller Canister w/Memory (RSM), part number 540-4027
When returning a controller canister for repair, ensure that the memory SIMMs are
returned with the controller canister. If a SCSI controller canister being returned has
128-MB of cache memory, order two memory FRUs, part number F370-2439 in
addition to the replacement controller canister FRU.
Note – You might sometimes come across a controller with part number 375-0089-
01. This controller has the TX CDC chip. It was shipped in the SCSI version of the
A3500 with D1000 disk trays from July 1999 through October 1999. This controller
will only work with the SCSI versions of the A3500 (with D1000 disk trays) systems
that have RAID Manager 6.1.1 Update 2 or higher. The replacement FRU for this
controller is part number 540-3083. The TX controller should not be returned to the
FRU supply inventory.
5.2.7 Amount of Cache
■ The SCSI controller FRU is configured at the factory (default) with 64 MBs of
cache memory per board.
■ The SCSI controller FRU cache memory can be upgraded in the field to 128 MBs.
■ The FC controller FRU is configured at the factory (default) with 128 MBs of cache
memory per board.
■ Write cache in the A3x00 is normally mirrored between two controllers thus
reducing the effective cache size available to a controller by half.
■ The amount of cache memory between two controllers has to match before the
Write Cache Mirroring parameters described in Chapter 7 in the Sun StorEdge RAID
Manager 6.22 User’s Guide can be changed.
5.2.8 Battery Unit
See Section 7.4 “Replacing the Battery Unit” in the Sun StorEdge A3500/A3500FC
Controller Module Guide for detailed instructions on replacing the battery unit.
■ Make sure you reset the battery age on both controllers.
■ Check the battery date code label to make sure the new battery FRU has not
exceeded it’s shelf life (12 months from date of Manufacture)