I'm having issues at the moment where various drives are becoming disabled and requiring fixing and rebuilding. When the rebuild happens, the speed is abysmal (like 1--2mb/s) and messages are spammed here:

 

ay 29 22:43:42 Pluto kernel: ata6.00: failed command: READ FPDMA QUEUED
May 29 22:43:42 Pluto kernel: ata6.00: cmd 60/38:00:78:dc:7c/01:00:01:00:00/40 tag 0 ncq dma 159744 in
May 29 22:43:42 Pluto kernel:         res 40/00:08:b0:dd:7c/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
May 29 22:43:42 Pluto kernel: ata6.00: status: { DRDY }
May 29 22:43:42 Pluto kernel: ata6.00: failed command: READ FPDMA QUEUED
May 29 22:43:42 Pluto kernel: ata6.00: cmd 60/08:08:b0:dd:7c/04:00:01:00:00/40 tag 1 ncq dma 528384 in
May 29 22:43:42 Pluto kernel:         res 40/00:08:b0:dd:7c/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
May 29 22:43:42 Pluto kernel: ata6.00: status: { DRDY }
May 29 22:43:42 Pluto kernel: ata6.00: failed command: READ FPDMA QUEUED
May 29 22:43:42 Pluto kernel: ata6.00: cmd 60/f8:b8:b8:c5:7c/02:00:01:00:00/40 tag 23 ncq dma 389120 in
May 29 22:43:42 Pluto kernel:         res 40/00:08:b0:dd:7c/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
May 29 22:43:42 Pluto kernel: ata6.00: status: { DRDY }
May 29 22:43:42 Pluto kernel: ata6.00: failed command: READ FPDMA QUEUED
May 29 22:43:42 Pluto kernel: ata6.00: cmd 60/38:c0:b0:c8:7c/01:00:01:00:00/40 tag 24 ncq dma 159744 in
May 29 22:43:42 Pluto kernel:         res 40/00:08:b0:dd:7c/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
May 29 22:43:42 Pluto kernel: ata6.00: status: { DRDY }
May 29 22:43:42 Pluto kernel: ata6.00: failed command: READ FPDMA QUEUED
May 29 22:43:42 Pluto kernel: ata6.00: cmd 60/08:c8:e8:c9:7c/04:00:01:00:00/40 tag 25 ncq dma 528384 in
May 29 22:43:42 Pluto kernel:         res 40/00:08:b0:dd:7c/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
May 29 22:43:42 Pluto kernel: ata6.00: status: { DRDY }
May 29 22:43:42 Pluto kernel: ata6.00: failed command: READ FPDMA QUEUED
May 29 22:43:42 Pluto kernel: ata6.00: cmd 60/38:d0:f0:cd:7c/01:00:01:00:00/40 tag 26 ncq dma 159744 in
May 29 22:43:42 Pluto kernel:         res 40/00:08:b0:dd:7c/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
May 29 22:43:42 Pluto kernel: ata6.00: status: { DRDY }
May 29 22:43:42 Pluto kernel: ata6.00: failed command: READ FPDMA QUEUED
May 29 22:43:42 Pluto kernel: ata6.00: cmd 60/38:d8:28:cf:7c/01:00:01:00:00/40 tag 27 ncq dma 159744 in
May 29 22:43:42 Pluto kernel:         res 40/00:08:b0:dd:7c/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
May 29 22:43:42 Pluto kernel: ata6.00: status: { DRDY }
May 29 22:43:42 Pluto kernel: ata6.00: failed command: READ FPDMA QUEUED
May 29 22:43:42 Pluto kernel: ata6.00: cmd 60/08:e0:60:d0:7c/04:00:01:00:00/40 tag 28 ncq dma 528384 in
May 29 22:43:42 Pluto kernel:         res 40/00:08:b0:dd:7c/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
May 29 22:43:42 Pluto kernel: ata6.00: status: { DRDY }
May 29 22:43:42 Pluto kernel: ata6.00: failed command: READ FPDMA QUEUED
May 29 22:43:42 Pluto kernel: ata6.00: cmd 60/08:e8:68:d4:7c/04:00:01:00:00/40 tag 29 ncq dma 528384 in
May 29 22:43:42 Pluto kernel:         res 40/00:08:b0:dd:7c/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
May 29 22:43:42 Pluto kernel: ata6.00: status: { DRDY }
May 29 22:43:42 Pluto kernel: ata6.00: failed command: READ FPDMA QUEUED
May 29 22:43:42 Pluto kernel: ata6.00: cmd 60/08:f0:70:d8:7c/04:00:01:00:00/40 tag 30 ncq dma 528384 in
May 29 22:43:42 Pluto kernel:         res 40/00:08:b0:dd:7c/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
May 29 22:43:42 Pluto kernel: ata6.00: status: { DRDY }
May 29 22:43:42 Pluto kernel: ata6: hard resetting link
May 29 22:43:48 Pluto kernel: ata6: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
May 29 22:43:48 Pluto kernel: ata6.00: configured for UDMA/33
May 29 22:43:48 Pluto kernel: ata6: EH complete

 

 

pluto-diagnostics-20220529-2252.zip

Check/replace cables on disk1, also check filesystem on disk2.

I've just replaced all the cables in the server, looks good so far 👍