Hi guys, i need some help. Some days ago i precleared then added old hitachi drive to my array,  and now i see some errors during parity check. Parity is fine files are fine...

Aug 13 00:32:49 unRaid kernel: ata6.00: exception Emask 0x0 SAct 0x8000000 SErr 0x0 action 0x6 frozen
Aug 13 00:32:49 unRaid kernel: ata6.00: failed command: READ FPDMA QUEUED
Aug 13 00:32:49 unRaid kernel: ata6.00: cmd 60/08:d8:c0:00:00/00:00:00:00:00/40 tag 27 ncq dma 4096 in
Aug 13 00:32:49 unRaid kernel:         res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
Aug 13 00:32:49 unRaid kernel: ata6.00: status: { DRDY }
Aug 13 00:32:49 unRaid kernel: ata6: hard resetting link
Aug 13 00:32:49 unRaid kernel: ata6: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Aug 13 00:32:49 unRaid kernel: ata6.00: configured for UDMA/133
Aug 13 00:32:49 unRaid kernel: ata6: EH complete
Aug 13 00:37:51 unRaid kernel: ata6.00: exception Emask 0x0 SAct 0x400008 SErr 0x0 action 0x6 frozen
Aug 13 00:37:51 unRaid kernel: ata6.00: failed command: READ FPDMA QUEUED
Aug 13 00:37:51 unRaid kernel: ata6.00: cmd 60/00:18:78:22:79/02:00:07:00:00/40 tag 3 ncq dma 262144 in
Aug 13 00:37:51 unRaid kernel:         res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
Aug 13 00:37:51 unRaid kernel: ata6.00: status: { DRDY }
Aug 13 00:37:51 unRaid kernel: ata6.00: failed command: READ FPDMA QUEUED
Aug 13 00:37:51 unRaid kernel: ata6.00: cmd 60/00:b0:78:20:79/02:00:07:00:00/40 tag 22 ncq dma 262144 in
Aug 13 00:37:51 unRaid kernel:         res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
Aug 13 00:37:51 unRaid kernel: ata6.00: status: { DRDY }
Aug 13 00:37:51 unRaid kernel: ata6: hard resetting link
Aug 13 00:37:52 unRaid kernel: ata6: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Aug 13 00:37:52 unRaid kernel: ata6.00: configured for UDMA/133
Aug 13 00:37:52 unRaid kernel: ata6: EH complete
Aug 13 00:53:14 unRaid kernel: ata6.00: exception Emask 0x0 SAct 0x4 SErr 0x0 action 0x6 frozen
Aug 13 00:53:14 unRaid kernel: ata6.00: failed command: READ FPDMA QUEUED
Aug 13 00:53:14 unRaid kernel: ata6.00: cmd 60/00:10:98:44:2e/02:00:02:00:00/40 tag 2 ncq dma 262144 in
Aug 13 00:53:14 unRaid kernel:         res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
Aug 13 00:53:14 unRaid kernel: ata6.00: status: { DRDY }
Aug 13 00:53:14 unRaid kernel: ata6: hard resetting link
Aug 13 00:53:15 unRaid kernel: ata6: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Aug 13 00:53:15 unRaid kernel: ata6.00: configured for UDMA/133
Aug 13 00:53:15 unRaid kernel: ata6: EH complete
Aug 13 00:56:17 unRaid kernel: ata6.00: exception Emask 0x0 SAct 0x800 SErr 0x0 action 0x6 frozen
Aug 13 00:56:17 unRaid kernel: ata6.00: failed command: READ FPDMA QUEUED
Aug 13 00:56:17 unRaid kernel: ata6.00: cmd 60/00:58:f0:7b:60/02:00:02:00:00/40 tag 11 ncq dma 262144 in
Aug 13 00:56:17 unRaid kernel:         res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
Aug 13 00:56:17 unRaid kernel: ata6.00: status: { DRDY }
Aug 13 00:56:17 unRaid kernel: ata6: hard resetting link
Aug 13 00:56:18 unRaid kernel: ata6: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Aug 13 00:56:18 unRaid kernel: ata6.00: configured for UDMA/133
Aug 13 00:56:18 unRaid kernel: ata6: EH complete

Do I need to worry?

That error is most likely due to cabling problems with the drive in question.   

what kind of tests should I do? Reconnect cable? Replace cable? 

I did another parity check, finished with no errors. Everything works fine. I keep watching log.

unraid-diagnostics-20180813-1734.zip

On 8/13/2018 at 8:41 AM, vanes said:

Replace cable?

 

^ This.