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SSA Link Errors
SSA link errors can be caused if:
v Power is removed from an SSA device.
v An SSA device is failing.
v An SSA device is removed.
v A cable is disconnected.
Such errors might be indicated by:
v SRN 45PAA
v A flashing link status (Ready) light on the SSA device at each end of the failing link
v The indication of an open link by the Link Verification service aid
SSA Link Error Problem Determination
Instead of using the normal MAPs to solve a link error problem, you can refer directly to
the link status lights to isolate the failing FRU, as described here.
In an SSA loop, SSA devices are connected through two or more SSA links to an SSA
adapter. Each SSA link is the connection between two SSA nodes (devices or
adapters); for example, disk drive to disk drive, adapter to disk drive, or adapter to
adapter.
An SSA link can contain several parts. When doing problem determination, think of the
link and all its parts as one complete item.
Here are some examples of SSA links. Each link contains more than one part.
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