I have been dealing with this issue on and off for over a year now and thought I had it all working good for the past few months and a few days ago it popped up for me again.
I had an issue with real slow cache writes to the array and the content would not move off from cache. I rebooted as then when system came up it started to do a Parity check and the Parity check said it would be 200 plus days to complete.
I was advised that this may be a sata cable issue so I bought new sata cables and replaced all 6.
This worked for about 10 hours and Parity check was going fine until it stopped and then moved back to 150 plus days.
Below is the log when the red error showed up and I have attached is the complete log after a reboot.
As mentioned I have been dealing with this on and off for over a year now and whatever I do does not end up in a long term solution.
Any help would be appreciated in resolving this issue.
May 13 16:21:02 TemplarTower kernel: ata7.00: exception Emask 0x10 SAct 0x800000 SErr 0x4090000 action 0xe frozen
May 13 16:21:02 TemplarTower kernel: ata7.00: irq_stat 0x00400040, connection status changed
May 13 16:21:02 TemplarTower kernel: ata7: SError: { PHYRdyChg 10B8B DevExch }
May 13 16:21:02 TemplarTower kernel: ata7.00: failed command: READ FPDMA QUEUED
May 13 16:21:02 TemplarTower kernel: ata7.00: cmd 60/08:b8:d0:4e:b0/00:00:10:04:00/40 tag 23 ncq dma 4096 in
May 13 16:21:02 TemplarTower kernel: res 40/00:00:d0:4e:b0/00:00:10:04:00/40 Emask 0x10 (ATA bus error)
May 13 16:21:02 TemplarTower kernel: ata7.00: status: { DRDY }
May 13 16:21:02 TemplarTower kernel: ata7: hard resetting link
May 13 16:21:08 TemplarTower kernel: ata7: link is slow to respond, please be patient (ready=0)
May 13 16:21:12 TemplarTower kernel: ata7: COMRESET failed (errno=-16)
May 13 16:21:12 TemplarTower kernel: ata7: hard resetting link
May 13 16:21:13 TemplarTower kernel: ata7: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
May 13 16:21:13 TemplarTower kernel: ata7.00: supports DRM functions and may not be fully accessible
May 13 16:21:14 TemplarTower kernel: ata7.00: supports DRM functions and may not be fully accessible
May 13 16:21:14 TemplarTower kernel: ata7.00: configured for UDMA/133
May 13 16:21:14 TemplarTower kernel: ata7: EH complete
unRAID Log.txt