I noticed there are disk errors on the parity drive.
Ive also attached the diagnostic bundle.
Below is a snip of the syslog:
Jan 2 14:59:46 NASty kernel: md: disk0 read error, sector=3546822248 Jan 2 14:59:46 NASty kernel: md: disk0 read error, sector=3546822256 Jan 2 14:59:46 NASty kernel: md: disk0 read error, sector=3546822264 Jan 2 14:59:46 NASty kernel: md: disk0 read error, sector=3546822272 Jan 2 14:59:46 NASty kernel: md: disk0 read error, sector=3546822280 Jan 2 14:59:46 NASty kernel: md: disk0 read error, sector=3546822288 Jan 2 14:59:46 NASty kernel: md: disk0 read error, sector=3546822296 Jan 2 14:59:46 NASty kernel: md: disk0 read error, sector=3546822304 Jan 2 14:59:46 NASty kernel: ata4: EH complete Jan 2 15:00:14 NASty kernel: ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0 Jan 2 15:00:14 NASty kernel: ata4.00: irq_stat 0x40000001 Jan 2 15:00:14 NASty kernel: ata4.00: failed command: READ DMA EXT Jan 2 15:00:14 NASty kernel: ata4.00: cmd 25/00:40:60:8c:8b/00:05:d3:00:00/e0 tag 16 dma 688128 in Jan 2 15:00:14 NASty kernel: res 51/40:00:80:8d:8b/00:00:d3:00:00/00 Emask 0x9 (media error) Jan 2 15:00:14 NASty kernel: ata4.00: status: { DRDY ERR } Jan 2 15:00:14 NASty kernel: ata4.00: error: { UNC } Jan 2 15:00:14 NASty kernel: ata4.00: configured for UDMA/133 Jan 2 15:00:14 NASty kernel: sd 4:0:0:0: [sde] tag#16 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08 cmd_age=3s Jan 2 15:00:14 NASty kernel: sd 4:0:0:0: [sde] tag#16 Sense Key : 0x3 [current] Jan 2 15:00:14 NASty kernel: sd 4:0:0:0: [sde] tag#16 ASC=0x11 ASCQ=0x4 Jan 2 15:00:14 NASty kernel: sd 4:0:0:0: [sde] tag#16 CDB: opcode=0x88 88 00 00 00 00 00 d3 8b 8c 60 00 00 05 40 00 00 Jan 2 15:00:14 NASty kernel: blk_update_request: I/O error, dev sde, sector 3549138304 op 0x0:(READ) flags 0x4000 phys_seg 132 prio class 0 Jan 2 15:00:14 NASty kernel: md: disk0 read error, sector=3549138240 Jan 2 15:00:14 NASty kernel: md: disk0 read error, sector=3549138248 Jan 2 15:00:14 NASty kernel: md: disk0 read error, sector=3549138256 Jan 2 15:00:14 NASty kernel: md: disk0 read error, sector=3549138264
nasty-diagnostics-20220102-1826.zip