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Review #551

Updated by Pierre-Louis Bonicoli about 4 years ago

Orfeo, in @/var/log/syslog@:

<pre>
Jun 11 13:44:58 orfeo kernel: [11104758.581132] sd 4:1:2:0: [sdb]
Jun 11 13:44:58 orfeo kernel: [11104758.581192] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jun 11 13:44:58 orfeo kernel: [11104758.581252] sd 4:1:2:0: [sdb]
Jun 11 13:44:58 orfeo kernel: [11104758.581301] Sense Key : Illegal Request [current]
Jun 11 13:44:58 orfeo kernel: [11104758.581361] sd 4:1:2:0: [sdb]
Jun 11 13:44:58 orfeo kernel: [11104758.581409] Add. Sense: No additional sense information
Jun 11 13:44:59 orfeo kernel: [11104758.581469] sd 4:1:2:0: [sdb] CDB:
Jun 11 13:44:59 orfeo kernel: [11104758.581518] Write Same(10): 41 00 00 30 64 9f 00 00 18 00
Jun 11 13:44:59 orfeo kernel: [11104758.581608] end_request: I/O error, dev sdb, sector 3171487
Jun 11 13:44:59 orfeo kernel: [11104758.581688] sdb1: WRITE SAME failed. Manually zeroing.
[...]
Jun 11 13:46:35 orfeo kernel: [11104855.008330] sd 4:1:2:0: [sdb]
Jun 11 13:46:35 orfeo kernel: [11104855.008379] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jun 11 13:46:35 orfeo kernel: [11104855.008438] sd 4:1:2:0: [sdb]
Jun 11 13:46:35 orfeo kernel: [11104855.008486] Sense Key : Illegal Request [current]
Jun 11 13:46:35 orfeo kernel: [11104855.008545] sd 4:1:2:0: [sdb]
Jun 11 13:46:35 orfeo kernel: [11104855.008593] Add. Sense: No additional sense information
Jun 11 13:46:35 orfeo kernel: [11104855.008651] sd 4:1:2:0: [sdb] CDB:
Jun 11 13:46:35 orfeo kernel: [11104855.008700] Write Same(10): 41 00 00 74 44 1f 00 00 08 00
Jun 11 13:46:35 orfeo kernel: [11104855.008795] sdb1: WRITE SAME failed. Manually zeroing.
</pre>

The error seems to slow down the system (for example @slapd@ was unavailable while this message was logged).

I guess we should apply this proposed solution: https://access.redhat.com/solutions/1394733.

Currently @max_write_same_blocks@ is enabled for @sdb@.

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