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Installing Upgrades to Your RA7000 Subsystem 8-15
Compaq Confidential – Need to Know Required
Writer: Robert Young Project: HSZ70 Solutions Software V7.7 for Novell NetWare - PCI Comments:
Part Number: AA-R8JUE-TE File Name: i-ch8 Installing Upgrades to Your RA7000 Subsystem.doc Last Saved On: 5/22/00 2:23 PM
Installing Additional Cache Memory
Cache modules come with 64MB cache memory already installed. You can
increase the cache memory to 128MB by installing two, 32MB SIMM boards
onto the cache module.
NOTE: Supported cache memory is either 64MB or 128MB. Do not configure your cache
for 96MB; otherwise, improper system operation may occur.
To mirror cache in a dual-redundant controller subsystem, each cache module
must have the same amount of memory: either 64 or 128MB.
To expand the memory of a cache module already installed in a subsystem
enclosure, you must first remove the cache module.
NOTE: The external cache battery (ECB) SBB provides power to the RAID array controller
cache module if system power fails. The cache module in turn provides power to the ECB
during normal operation.
To install memory on a cache module:
1. Obtain and place an ESD wrist strap around your wrist. Make sure that
the strap fits snugly around your wrist.
2. Attach or clip the other end of the ESD wrist strap to the cabinet
grounding stud or a convenient cabinet grounding point (non-painted
surface).
3. The existing SIMMs (SIMM0 and SIMM2) are installed in the cache
module as shown in Figure 8-11. The corresponding SIMM slots can be
identified by referring to the lower ends of the slots, which are labeled
SIMM0 through SIMM3.