zLinux zVM guests lost the paths to SAN disk with - 'Medium access timeout failure' errors
Issue
-
When SAN storage got firmware upgraded, many zLinux zVM guests lost the paths to SAN disk with following errors:
Jun 1 13:21:26 hostname kernel: sd 0:0:0:906: [sdg] Medium access timeout failure. Offlining disk! Jun 1 13:21:26 hostname kernel: sd 1:0:0:906: [sdh] Medium access timeout failure. Offlining disk! Jun 1 13:21:26 hostname kernel: sd 0:0:0:906: [sdg] Jun 1 13:21:26 hostname kernel: sd 1:0:0:906: [sdh] Result: hostbyte=DID_TIME_OUT driverbyte=DRIVER_OK Jun 1 13:21:26 hostname kernel: sd 0:0:0:906: [sdg] CDB: Read(10): 28 00 0e 11 d7 58 00 00 18 00 [...] Jun 1 13:21:26 hostname kernel: sd 0:0:0:906: rejecting I/O to offline device Jun 1 13:21:26 hostname kernel: sd 0:0:0:906: rejecting I/O to offline device Jun 1 13:21:26 hostname kernel: sd 0:0:0:906: [sdg] Result: hostbyte=DID_TIME_OUT driverbyte=DRIVER_OK [...]
Environment
- Red Hat Enterprise Linux 6
- IBM systemZ/s390
- SAN devices connected using
zfcp
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