User`s guide

6. Replace the ESD shields over the program cards by pushing the two plastic
push pins on each side of the two shields.
7. Remove the ESD grounding strap.
4.9 Upgrading Your HS Array Controller Subsystem Components
The following is a list of components that you can upgrade in your HS array
controller subsystem:
• Program card—Upgrade your firmware by replacing the program card with
a program card containing the new firmware version. For HSZ40–Bx array
controllers, use the CLCP utility to download new firmware.
• Cache module—Upgrade from a 16-MB read cache module to a 16- or 32-
MB write-back cache module. Alternatively, you can upgrade to a 32-MB
read cache module. For subsystems with no cache, upgrade to any read or
write-back cache module size. (Use the C_SWAP utility to upgrade cache
modules.)
• HS array controller subsystem—Upgrade by adding a second controller and
cache module to form a dual-redundant controller configuration. (Use the
C_SWAP utility.)
CAUTION
In a dual-redundant configuration with cache modules, both cache
modules must have the same number of megabytes and be the same cache
type (both read or both write-back). The controller firmware version must
be the same for both controllers for proper operation of the subsystem.
When the firmware version and/or cache module sizes are mismatched,
the controllers detect the mismatch and do not allow access to any
devices.
• Power supply—Add redundant power by adding a second power supply to
your controller or storage shelves. (Refer to the StorageWorks Solutions
Configuration Guide for power supply details.) You will also need a second
cable distribution unit (CDU) to support you redundant power.
• BA350–MA shelf—Add up to four controller shelves to your SW800-series
data center cabinet, or up to two controller shelves to your SW500-series
cabinet.
• More storage devices—Add additional disk drives, tape drives, or other
supported devices to unused slots in your storage shelves.
4.10 Upgrading Your Cache Module
You may want to upgrade your current read cache to a write-back cache module
or simply to a read cache module with more megabytes. If you ordered your
controller without a cache module, you can choose between a 16- or 32-MB read
cache module, or a 16- or 32-MB write-back cache module. The following section
describes how to determine what kind of cache module you currently have in your
subsystem. This will help you to determine which option numbers to order for
your upgrade. See the appropriate table for your specific controller model. Use
the controller warm swap utility (C_SWAP) when upgrading your cache modules.
4–30 Installation