I recently noticed this repeating error in my system log (repeating every 10 seconds or so) after my system became non-responsive to the point VM's, local/remote WebGUI, and SSH would not respond.

Mar 2 11:39:37 MCKNIGHT-UNRAID kernel: ata10: exception Emask 0x10 SAct 0x0 SErr 0x4040000 action 0xe frozen
Mar 2 11:39:37 MCKNIGHT-UNRAID kernel: ata10: irq_stat 0x00000040, connection status changed
Mar 2 11:39:37 MCKNIGHT-UNRAID kernel: ata10: SError: { CommWake DevExch }
Mar 2 11:39:37 MCKNIGHT-UNRAID kernel: ata10: limiting SATA link speed to 1.5 Gbps
Mar 2 11:39:37 MCKNIGHT-UNRAID kernel: ata10: hard resetting link
Mar 2 11:39:39 MCKNIGHT-UNRAID kernel: ata10: COMRESET failed (errno=-32)
Mar 2 11:39:39 MCKNIGHT-UNRAID kernel: ata10: reset failed (errno=-32), retrying in 8 secs
Mar 2 11:39:48 MCKNIGHT-UNRAID kernel: ata10: hard resetting link
Mar 2 11:39:49 MCKNIGHT-UNRAID kernel: ata10: SATA link down (SStatus 0 SControl 310)
Mar 2 11:39:49 MCKNIGHT-UNRAID kernel: ata10: EH complete

 

All of my storage devices appear fully functional (Boot drive, 2 Cache, 3 Array, 1 Optical Drive passed through to a VM, and one Unassigned device assigned to a non-running VM).

 

Any help diagnosing this issue would be much appreciated.

unraid-diagnostics-20180302-1123.zip

Is there any device connected to the onboard SATA port #6?

11 hours ago, johnnie.black said:

Is there any device connected to the onboard SATA port #6?

 

No, I have ports 1,2,3,4,7 currently occupied according to my motherboard manual (MSI X99 Gaming Pro Carbon)

Edited March 3, 20188 yr by d_mcknight

Then it's likely a board problem, ATA10 is port #6 and is initially detected as not used, but then it thinks something is there, though it never succeeds in initializing the port.

There's one thing you can try, move one of your devices to port #6, maybe it works correctly if in use.

1 minute ago, johnnie.black said:

Then it's likely a board problem, ATA10 is port #6 and is initially detected as not used, but then it thinks something is there, though it never succeeds in initializing the port.

 

Interesting.. I'll try connecting a drive and see what happens. How did you figure out ATA10 corresponds to port #6?

By looking at the syslog, ATA1 to 4 correspond to ports #7 to #10 and ATA5 to 10 ports #1 to #6.