I rebooted my NAS earlier this week (I turn it off when I'm away from home for a day or more) and found this message in my inbox.
freenas.local kernel log messages:
CPU: Intel(R) Core(TM) i3-4170 CPU @ 3.70GHz (3691.53-MHz K8-class CPU)
Timecounter "TSC-low" frequency 1845767112 Hz quality 1000
(da6:mps0:0:6:0): READ(10). CDB: 28 00 00 00 01 80 00 01 00 00
(da6:mps0:0:6:0): CAM status: SCSI Status Error
(da6:mps0:0:6:0): SCSI status: Check Condition
(da6:mps0:0:6:0): SCSI sense: ABORTED COMMAND asc:47,3 (Information unit iuCRC error detected)
(da6:mps0:0:6:0): Retrying command (per sense data)
(da6:mps0:0:6:0): READ(10). CDB: 28 00 00 00 02 80 00 01 00 00
(da6:mps0:0:6:0): CAM status: SCSI Status Error
(da6:mps0:0:6:0): SCSI status: Check Condition
(da6:mps0:0:6:0): SCSI sense: ABORTED COMMAND asc:47,3 (Information unit iuCRC error detected)
(da6:mps0:0:6:0): Retrying command (per sense data)
(da6:mps0:0:6:0): READ(10). CDB: 28 00 00 40 02 a0 00 00 e0 00
(da6:mps0:0:6:0): CAM status: SCSI Status Error
(da6:mps0:0:6:0): SCSI status: Check Condition
(da6:mps0:0:6:0): SCSI sense: ABORTED COMMAND asc:47,3 (Information unit iuCRC error detected)
(da6:mps0:0:6:0): Retrying command (per sense data)
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 58 00 00 00 08 00 00 length 4096 SMID 268 terminated ioc 804b scsi 0 state c xfer 0
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 50 00 00 00 08 00 00 length 4096 SMID 249 terminated ioc 804b scsi 0 state c xfer 0
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 48 00 00 00 08 00 00 length 4096 SMID 277 terminated ioc 804b scsi 0 state c xfer 0
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 40 00 00 00 08 00 00 length 4096 SMID 264 terminated ioc 804b scsi 0 state c xfer 0
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 38 00 00 00 08 00 00 length 4096 SMID 237 terminated ioc 804b scsi 0 state c xfer 0
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 30 00 00 00 08 00 00 length 4096 SMID 233 terminated ioc 804b scsi 0 state c xfer 0
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 28 00 00 00 08 00 00 length 4096 SMID 225 terminated ioc 804b scsi 0 state c xfer 0
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 20 00 00 00 08 00 00 length 4096 SMID 217 terminated ioc 804b scsi 0 state c xfer 0
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 18 00 00 00 08 00 00 length 4096 SMID 211 terminated ioc 804b scsi 0 state c xfer 0
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 10 00 00 00 08 00 00 length 4096 SMID 205 terminated ioc 804b scsi 0 state c xfer 0
(da6:mps0:0:6:0): READ(16). CDB: 88 00 00 00 00 01 d1 c0 be 10 00 00 00 08 00 00
(da6:mps0:0:6:0): CAM status: SCSI Status Error
(da6:mps0:0:6:0): SCSI status: Check Condition
(da6:mps0:0:6:0): SCSI sense: UNIT ATTENTION asc:29,0 (Power on, reset, or bus device reset occurred)
(da6:mps0:0:6:0): Retrying command (per sense data)
(da6:mps0:0:6:0): READ(10). CDB: 28 00 00 40 00 a0 00 00 e0 00
(da6:mps0:0:6:0): CAM status: SCSI Status Error
(da6:mps0:0:6:0): SCSI status: Check Condition
(da6:mps0:0:6:0): SCSI sense: UNIT ATTENTION asc:29,0 (Power on, reset, or bus device reset occurred)
(da6:mps0:0:6:0): Retrying command (per sense data)
vboxdrv: fAsync=0 offMin=0x2ba offMax=0x1074-- End of security output -
da6 is one of the 8 WD Reds that make up the main RAIDZ2 pool. The drives were all bought new in the summer of 2015
This is the second time I've seen this message for this drive, but it doesn't happen with every reboot. Sometimes it gets no errors at all.
freenas.local kernel log messages:
CPU: Intel(R) Core(TM) i3-4170 CPU @ 3.70GHz (3691.52-MHz K8-class CPU)
Timecounter "TSC-low" frequency 1845760716 Hz quality 1000
vboxdrv: fAsync=0 offMin=0x2e6 offMax=0x1060-- End of security output -
Should I be worried? Is it time to buy a couple of spare drives?
Or did I indeed read that it is a CRC error, which means that fiddling with the cable could do the trick?
Full NAS specs here (link goes to LTT forum)