Technical data

4–31
Compaq HSZ80 Array Controller ACS Version 8.3 Maintenance and Service Guide
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2A All cabinet IO modules are not of the
same type.
Cabinet I/O modules are a
combination of single-sided and
differential.
Ensure that the I/O modules in an
extended subsystem are either all
single-ended or all differential, not
both.
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29 EMU protocol version incompatible
The microcode in the EMU and the
software in the controller are not
compatible.
Upgrade either the EMU microcode
or the software (refer to the Release
Notes that accompanied the
controller’s software).
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28 An unexpected Machine Fault/NMI
occurred during Last Failure
processing
A machine fault was detected while a
Non-Maskable Interrupt was
processing.
Reset the controller.
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27 Memory module has insufficient
usable memory.
Replace indicated DIMM(s)
(This indication is only provided
when Fault LED logging is enabled).
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26 Indicated memory module is missing.
Controller is unable to detect a
particular memory module.
Insert memory module (cache
board).
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25 Recursive Bugcheck detected
The same bugcheck has occurred
three times within ten minutes, and
controller operation has terminated.
Reset the controller. If this fault
pattern is displayed repeatedly,
follow the repair action(s)
associated with the Last Failure code
that is repeatedly terminating
controller execution.
Table 4–5 Solid OCP Patterns (Continued)
Pattern OCP
Code
Error Repair Action