I am experiencing a what I think is a hardware issue but I cant seem to pin point it yet. My situation became noticeable when I realized my parity check was taking a very long time and the speeds were not what I would expect from past parity checks. The speeds would spin up to about 150MB/s and then right away back to 0. This would happen over and over as long as the parity check was running. When I look into the logs I see this going one. These errors start and stop with the parity checks.

I looked into ata5.00 and from what I could make out, I had a HD connected to that location so I moved it to another spot on a different SATA cable but it still seems to be generate this error and it still reference ata5. Am I miss interpreting the hardware location of this ata5.?

Other than this issue the system runs normally. Any help would be much appreciated, let me know if there's more that would help.

ov 15 17:59:15 UNRAID kernel: ata5.00: exception Emask 0x50 SAct 0x8 SErr 0x4090800 action 0xe frozen

Nov 15 17:59:15 UNRAID kernel: ata5.00: irq_stat 0x00400040, connection status changed

Nov 15 17:59:15 UNRAID kernel: ata5: SError: { HostInt PHYRdyChg 10B8B DevExch }

Nov 15 17:59:15 UNRAID kernel: ata5.00: failed command: READ FPDMA QUEUED

Nov 15 17:59:15 UNRAID kernel: ata5.00: cmd 60/00:18:40:54:00/04:00:00:00:00/40 tag 3 ncq dma 524288 in

Nov 15 17:59:15 UNRAID kernel: res 40/00:ff:00:00:00/00:00:00:00:00/40 Emask 0x50 (ATA bus error)

Nov 15 17:59:15 UNRAID kernel: ata5.00: status: { DRDY }

Nov 15 17:59:15 UNRAID kernel: ata5: hard resetting link

Nov 15 17:59:21 UNRAID kernel: ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300)

Nov 15 17:59:21 UNRAID kernel: ata5.00: configured for UDMA/133

Nov 15 17:59:21 UNRAID kernel: ata5: EH complete

Nov 15 17:59:21 UNRAID kernel: ata5.00: exception Emask 0x50 SAct 0xc00000 SErr 0x4090800 action 0xe frozen

Nov 15 17:59:21 UNRAID kernel: ata5.00: irq_stat 0x00400040, connection status changed

Nov 15 17:59:21 UNRAID kernel: ata5: SError: { HostInt PHYRdyChg 10B8B DevExch }

Nov 15 17:59:21 UNRAID kernel: ata5.00: failed command: READ FPDMA QUEUED

Nov 15 17:59:21 UNRAID kernel: ata5.00: cmd 60/40:b0:80:a1:00/05:00:00:00:00/40 tag 22 ncq dma 688128 in

Nov 15 17:59:21 UNRAID kernel: res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x50 (ATA bus error)

Nov 15 17:59:21 UNRAID kernel: ata5.00: status: { DRDY }

Nov 15 17:59:21 UNRAID kernel: ata5.00: failed command: READ FPDMA QUEUED

Nov 15 17:59:21 UNRAID kernel: ata5.00: cmd 60/40:b8:c0:a6:00/05:00:00:00:00/40 tag 23 ncq dma 688128 in

Nov 15 17:59:21 UNRAID kernel: res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x50 (ATA bus error)

Nov 15 17:59:21 UNRAID kernel: ata5.00: status: { DRDY }

Nov 15 17:59:21 UNRAID kernel: ata5: hard resetting link

Syslog.txt

unraid-diagnostics-20251115-1805.zip

Edited November 16, 2025Nov 16 by benjipickard
Added diagnostic folder

ata5 is currently disk10. Replace both cables or swap with another disk and see where the issue follows.

Thanks for the Reply JorgeB, I feel like Im missing something obvious. Could you explain to me why ATA5 is currently Disk 10? I don't see that anywhere.

Disk 10 to me is WDC WD40EFAX-68J 0A82 /dev/sdj, and in the device section of tools drive sdj looks like ATA7:0

Thanks!

[7:0:0:0]

disk ATA WDC WD40EFAX-68J 0A82 /dev/sdj 4.00TB

You can find it by looking at lscsi.txt in the diags:

[7:0:0:0] disk ATA WDC WD40EFAX-68J 0A82 /dev/sdj /dev/sg9

state=running queue_depth=32 scsi_level=6 type=0 device_blocked=0 timeout=30

dir: /sys/bus/scsi/devices/7:0:0:0 [/sys/devices/pci0000:00/0000:00:17.0/ata5/host7/target7:0:0/7:0:0:0]

Thank you JorgeB, i see that now. appreciate the help! I will try swapping the cable after work today and see if i can get it to clear up.