Specifications

4–18 Compaq StorageWorks HSG80 Array Controller ACS Version 8.5 Maintenance and Service Guide
❏ Have an ECB connected and the UPS switch is set to one of the following:
▲ NOUPS (no UPS is connected)
▲ NODE_ONLY (a UPS is connected)
❏ Do not have an ECB connected and the UPS switch is set to
DATACENTER_WIDE
■ No unit errors are outstanding (for example, lost data or data that cannot be written to
devices).
■ Both controllers are started and configured in failover mode.
For important considerations when adding or replacing DIMMs in a mirrored cache
configuration, see Chapter 2.
Significant Event Reporting
Controller fault-management software reports information about significant events that
occur. These events are reported via the:
■ Maintenance terminal
■ Host error log
■ OCP
Some events cause controller operation to terminate; others allow the controller to remain
operable. Each of these two instances is detailed in the following sections.
Events That Cause Controller Operation to Terminate
Events that cause the controller to terminate operations are reported three possible ways:
■ a flashing OCP pattern display
■ a solid OCP pattern display
■ last failure reporting
Use Table 4–4 to interpret flashing OCP patterns and Table 4–5 to interpret solid OCP
patterns. In the ERROR column of the solid OCP patterns, there are two separate
descriptions. The first denotes the actual error message that appears on your terminal, and
the second provides a more detailed explanation of the designated error.