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SSA RAID Adapter, SSA, and RAID
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SSA - LINK ERRORS
1
This MAP helps you to isolate FRUs that are causing an SSA loop problem
between a device and the SSA RAID Adapter, or between two devices. If you are
not familiar with SSA loops, read the section "SSA Loops and Links" on page 113
before using this MAP.
SSA link errors can be caused if:
• Power is removed from an SSA device
• An SSA device is failing
• An SSA device is removed
• A cable is disconnected.
Such errors might be indicated by:
• SRN 45PAA
• A flashing link status (Ready) light on the SSA device at each end of the failing
link (For additional information on link status lights, refer to "Link Status Lights"
on page 118.)
• The indication of an open link by the Disk Service Aid.
For additional information on link errors, refer to "SSA Link" on page 117.
Attention: Unless the system unit needs to be turned off for some other reason,
do not turn off the system when servicing the SSA loop. Unit power cables and
external SSA cables that connect the devices to the system can be disconnected
while that system is running.
Are the SSA service aids available?
NO
YES
~
Go to step 4.
2
Are any link status (ready) lights flashing on this
SSA loop?
NO
YES
~
Go to "SSA Link" on page 117.
3
Note the PAA (that is, the last three digits) of the
SRN.
Go to "Finding the Physical Location of a Device"
on page 125.
Chapter 7. The SSA RAID Adapter, SSA, and RAID
83
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