I upgraded my storage to stretch the other day, and the device started freezing. So I hooked up a serial console and saw the lots of ata errors
[ 206.171723] ata1: Unable to stop eDMA
[ 206.282486] ata4: Unable to stop eDMA
[ 206.393193] ata3: Unable to stop eDMA
[ 206.403606] ata3.00: exception Emask 0x52 SAct 0x7ffff7ff SErr 0xffffffff action 0xe frozen
[ 206.412041] ata3: SError: { RecovData RecovComm UnrecovData Persist Proto HostInt PHYRdyChg PHYInt CommWake 10B8B Dispar BadCRC Handshk LinkSeq TrStaTrns UnrecFIS DevExch }
[ 206.427529] ata3.00: failed command: WRITE FPDMA QUEUED
[ 206.432810] ata3.00: cmd 61/10:00:f8:43:1b/00:00:00:00:00/40 tag 0 ncq dma 8192 out
[ 206.432810] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x56 (ATA bus error)
[ 206.448541] ata3.00: status: { DRDY }
[ 206.452240] ata3.00: failed command: WRITE FPDMA QUEUED
[ 206.457519] ata3.00: cmd 61/10:08:e0:bd:23/00:00:00:00:00/40 tag 1 ncq dma 8192 out
[ 206.457519] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x56 (ATA bus error)
....
....
[ 208.910781] ata1.00: status: { DRDY }
[ 208.914478] ata1.00: failed command: WRITE FPDMA QUEUED
[ 208.919757] ata1.00: cmd 61/08:f0:e8:d3:a0/00:00:00:00:00/40 tag 30 ncq dma 4096 out
[ 208.919757] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x56 (ATA bus error)
[ 208.935572] ata1.00: status: { DRDY }
[ 208.939275] ata1: hard resetting link
[ 210.248841] ata4: failed to resume link (SControl FFFFFFFF)
I'm going to try going back to jessie, to see if its a hardware issue. Has anyone seen something similar on kirkwood devices?