Attached is a diagnostics log if anyone is willing to take a look.

I have had read errors on disk 2. Cancelled parity and pulled out the drive and put back in.

Parity check is still going down to about 2-8MB/sec (usually in the 105-108 area) with a few read errors popping up. (was also slow before cancelling)

 

Don't believe anything is writing to it or reading from it, any other reasons behind it, or maybe a failing drive? No other hardware changes since the last parity check.

 

Many Thanks

tower-diagnostics-20211201-2216.zip

6 minutes ago, Kuwabara89 said:

read errors on disk 2

 

Dec  1 13:50:52 Tower kernel: ata6.00: ATA-9: ST2000DM001-1CH164,             Z1E6VNKY, CC27, max UDMA/133
Dec  1 13:51:19 Tower kernel: md: import disk2: (sdg) ST2000DM001-1CH164_Z1E6VNKY size: 1953514552 
Dec  1 14:05:19 Tower kernel: md: recovery thread: check P ...
Dec  1 14:05:22 Tower kernel: ata6.00: exception Emask 0x50 SAct 0xc000000 SErr 0x4890800 action 0xe frozen
Dec  1 14:05:22 Tower kernel: ata6.00: irq_stat 0x0c400040, interface fatal error, connection status changed
Dec  1 14:05:22 Tower kernel: ata6: SError: { HostInt PHYRdyChg 10B8B LinkSeq DevExch }
Dec  1 14:05:22 Tower kernel: ata6.00: failed command: READ FPDMA QUEUED
Dec  1 14:05:22 Tower kernel: ata6.00: cmd 60/40:d0:c0:66:10/05:00:00:00:00/40 tag 26 ncq dma 688128 in
Dec  1 14:05:22 Tower kernel:         res 40/00:d0:c0:66:10/00:00:00:00:00/40 Emask 0x50 (ATA bus error)
Dec  1 14:05:22 Tower kernel: ata6.00: status: { DRDY }
Dec  1 14:05:22 Tower kernel: ata6.00: failed command: READ FPDMA QUEUED
Dec  1 14:05:22 Tower kernel: ata6.00: cmd 60/98:d8:00:6c:10/00:00:00:00:00/40 tag 27 ncq dma 77824 in
Dec  1 14:05:22 Tower kernel:         res 40/00:d0:c0:66:10/00:00:00:00:00/40 Emask 0x50 (ATA bus error)
Dec  1 14:05:22 Tower kernel: ata6.00: status: { DRDY }
Dec  1 14:05:22 Tower kernel: ata6: hard resetting link

Check connections, both ends, SATA and power, including splitters.

Have done power cables also this time, will see how that goes. Actually have the PC-Q25 also and have found it good for making sure no cables can shift.

5 minutes ago, Kuwabara89 said:

have the PC-Q25

Been using that one for years and have upgraded all of the hardware in it at least once.