d_mcknight

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

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

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