SRN Problem Possible Causes
1xxxx Description:SRNs in this range are not adapter SRNs.
Action: For SRNs in this range, see the documentation for your SSA
enclosure or SSAsubsystem.
Not applicable.
20PAA Description:An open SSA link has been detected.
Action: Run the Link Verificationservice aid to isolate the failure (see
“Link VerificationService Aid”on page 383).
If the SSAservice aids are not available, go to the service information for
the enclosure in which the device is installed
Possible FRUs:
Device (45%) (“Exchanging
Disk Drives”on page 319).
SSAadapter card (45%)
(“Removing and Replacing
anAdvanced SerialRAID
Adapter”on page 327).
External SSAcables (6%).
Internal SSA connections
(4%) (enclosure service
information).
21PAA
to
29PAA
Description:An SSA‘Threshold exceeded’link error has been detected.
Action: Go to “MAP 2323: SSAIntermittent Link Error”on page450.
Possible FRUs:
Device (45%)(“Exchanging
Disk Drives”on page 319).
SSAadapter card (45%)
(“Removing and Replacing
anAdvanced SerialRAID
Adapter”on page 327).
External SSAcables (6%).
Internal SSA connections
(4%) (enclosure service
information).
2A002 Description: Async code 02 has been received. Probably, a software error
has occurred.
Action: Go to “Software and Microcode Errors”on page441 before
exchanging any FRUs.
Possible FRUs:
Device (50%) (“Exchanging
Disk Drives”on page 319).
SSAadapter card (50%)
(“Removing and Replacing
anAdvanced SerialRAID
Adapter”on page 327).
2A003 Description: Async code 03 has been received. Probably, a software error
has occurred.
Action: Go to “Software and Microcode Errors”on page441 before
exchanging any FRUs.
Software error.
Possible FRUs:
Device (50%) (“Exchanging
Disk Drives”on page 319).
SSAadapter card (50%)
(“Removing and Replacing
anAdvanced SerialRAID
Adapter”on page 327).
Chapter18. SSA Problem Determination Procedures 413
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