SSA Link Errors
SSAlink errors can be caused if:
vPower is removed from an SSAdevice.
vAn SSAdevice is failing.
vAn SSAdevice is removed.
vAcable is disconnected.
Such errors might be indicated by:
vSRN 45PAA
vAflashing link status (Ready) light on the SSA device at each end of the failing link
vThe indication of an open link by the Link Verificationservice 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 SSAloop, 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 SSAlink 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 SSAlinks. Each link contains more than one part.
478 User’s Guide and Maintenance Information