IBM 7133 D40, Руководство по обслуживанию

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Link Status (Ready) Lights
If a fault occurs that prevents the operation of a particular link, the link status lights of
the various parts of the complete link show that the error has occurred.
You can find the failing link by looking for the flashing green status light at each end of
the affected link. Some configurations have other indicators along the link (for example,
on bypass cards or optical extenders) to help with FRU isolation.
The meanings of the lights are summarized here. If you need more information about
the lights, see:
v
“Lights and Controls” on page 5 for disk drive lights and bypass card lights of the
7133
v
The user or maintenance information for your using-system SSA attachment
hardware for the lights of the SSA attachment.
Summary of Disk Drive and SSA Attachment Lights
Link Status (Ready) Light:
Status of Light Meaning
Off Both SSA links are inactive. For more information, see “Disk Drive Module
Lights” on page 15.
Permanently on Both SSA links are active.
Slow flash
(two seconds on,
two seconds off) Only one SSA link is active.
Chapter 2. Problem Determination Procedures
135