Tonight my monthly parity check started and it ran very slow with a lot of error messages in the log.

Jul 1 06:59:56 unraid kernel: ata8.00: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0x6 frozen

Jul 1 06:59:56 unraid kernel: ata8.00: irq_stat 0x08000000, interface fatal error

Jul 1 06:59:56 unraid kernel: ata8.00: failed command: READ DMA EXT

Jul 1 06:59:56 unraid kernel: ata8.00: cmd 25/00:c0:48:f5:09/00:03:41:00:00/e0 tag 3 dma 491520 in

Jul 1 06:59:56 unraid kernel: res 50/01:01:01:00:00/00:00:00:00:00/00 Emask 0x10 (ATA bus error)

Jul 1 06:59:56 unraid kernel: ata8.00: status: { DRDY }

Jul 1 06:59:56 unraid kernel: ata8.00: error: { AMNF }

Jul 1 06:59:56 unraid kernel: ata8: hard resetting link

Jul 1 06:59:57 unraid kernel: ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 310)

Jul 1 06:59:57 unraid kernel: ata8.00: configured for UDMA/33

Jul 1 06:59:57 unraid kernel: ata8: EH complete

Jul 1 06:59:58 unraid kernel: ata5.00: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0x6 frozen

Jul 1 06:59:58 unraid kernel: ata5.00: irq_stat 0x08000000, interface fatal error

Jul 1 06:59:58 unraid kernel: ata5.00: failed command: READ DMA EXT

Jul 1 06:59:58 unraid kernel: ata5.00: cmd 25/00:c0:48:f5:09/00:03:41:00:00/e0 tag 22 dma 491520 in

Jul 1 06:59:58 unraid kernel: res 50/01:01:01:00:00/00:00:00:00:00/00 Emask 0x10 (ATA bus error)

Jul 1 06:59:58 unraid kernel: ata5.00: status: { DRDY }

Jul 1 06:59:58 unraid kernel: ata5.00: error: { AMNF }

and a lot more. any idea, what's going on?

unraid-diagnostics-20260701-0901.zip

There are issues logged with multiple devices. Are there any power splitters in use?