Hi all,

 so I have been getting parity errors, initially I got 218 errors twice in a row when doing a parity check, then last night the drive dropped out showing the dreaded "X" beside it and in the log it shows the messages below. So I have a dual parity setup and the second parity drive is only two weeks old.

My question, I am going to go get an 8tb WD external drive and run a preclear on it. I know this will take a long time and I do have a 4tb which I could drop into the array to fill the missing parity drive. 

Should I use the 4tb drive or just wait until the 8tb runs preclear and then add as the new parity drive.

Thoughts? Below are error logs from the existing parity drive which is the original parity drive that has been in use since I setup this server a couple of years ago and the drive age shows it as two and a half years old. I also tried moving the drive to a different slot in my server with no success.

Patrick

 

So below is the most recent log when I tried to add the parity drive back (the one that was initially "X" after the parity check. During the parity check it was giving me "unraid blk_update_request: I/O error"

Apr 5 08:17:59 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Synchronize Cache(10) failed: Result: hostbyte=0x04 driverbyte=0x00
Apr 5 08:17:59 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Stopping disk
Apr 5 08:17:59 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Start/Stop Unit failed: Result: hostbyte=0x04 driverbyte=0x00
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB)
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] 4096-byte physical blocks
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Write Protect is off
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Mode Sense: 00 3a 00 00
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Apr 5 08:18:21 UNRAID_6 kernel: sdo: sdo1
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Attached SCSI disk
Apr 5 08:18:27 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:18:27 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 08:18:27 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:21:36 UNRAID_6 emhttp: shcmd (187): /usr/local/sbin/set_ncq sdo 1 &> /dev/null
Apr 5 08:21:36 UNRAID_6 emhttp: shcmd (188): echo 128 > /sys/block/sdo/queue/nr_requests

SMART for the disk would be better. Syslog snippets are seldom sufficient.

 

For v6, you should always go to Tools - Diagnostics and post the complete diagnostics zip, which contains syslog(s), SMART for all disks, and many other useful things.

 

Not obvious that a drive only "2 years young" has actually failed. Connections are by far more common cause of disk disabled.

 

Since I don't know (no diagnostics) how many disks are in your array, I won't comment on how big the risk is with running only single parity.

So I am attaching the diagnostics file below. I switched the 1st parity drive out for an existing drive I had and then I switched the drive bay and ran parity again. When I went to bed last night it was at 92% complete but when I got up this morning the drive again had an "X" beside it saying parity is disabled. The second parity drive is showing valid and the history for the parity check is showing incomplete with 0 errors.

I pasted below the full drive info from the parity drive also.

The system has 15 data disks, 2 parity drives and 2 ssd cache drives in RAID 1. I am running 2 Supermicro AOC-SAS2LP-MV8 cards, an IO Crest 4 Port SATA III PCI-e 2.0 and the motherboard is an MSI H97 with an i5 and 8gb of memory.

Apr 5 07:51:20 UNRAID_6 kernel: sd 8:0:1:0: [sdo] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB)
Apr 5 07:51:20 UNRAID_6 kernel: sd 8:0:1:0: [sdo] 4096-byte physical blocks
Apr 5 07:51:20 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Write Protect is off
Apr 5 07:51:20 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Mode Sense: 00 3a 00 00
Apr 5 07:51:20 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Apr 5 07:51:20 UNRAID_6 kernel: sdo: sdo1
Apr 5 07:51:20 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Attached SCSI disk
Apr 5 07:51:41 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 07:51:41 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 07:51:41 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 07:51:55 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 07:51:55 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 07:51:55 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 07:52:09 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 07:52:19 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 07:52:23 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 07:52:31 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 07:59:15 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 07:59:15 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 07:59:15 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 07:59:20 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 07:59:20 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 07:59:20 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 07:59:59 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 07:59:59 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 07:59:59 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:12:57 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:12:57 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 08:12:57 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:13:06 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:13:06 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 08:13:06 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:13:17 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:13:17 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 08:13:17 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:16:21 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:16:21 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 08:16:21 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:16:25 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:16:25 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 08:16:25 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:17:59 UNRAID_6 kernel: sysfs group 'power' not found for kobject 'sdo1'
Apr 5 08:17:59 UNRAID_6 kernel: sysfs group 'power' not found for kobject 'sdo'
Apr 5 08:17:59 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Synchronizing SCSI cache
Apr 5 08:17:59 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Synchronize Cache(10) failed: Result: hostbyte=0x04 driverbyte=0x00
Apr 5 08:17:59 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Stopping disk
Apr 5 08:17:59 UNRAID_6 kernel: sd 8:0:1:0: [sdo] Start/Stop Unit failed: Result: hostbyte=0x04 driverbyte=0x00
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB)
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] 4096-byte physical blocks
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Write Protect is off
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Mode Sense: 00 3a 00 00
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Apr 5 08:18:21 UNRAID_6 kernel: sdo: sdo1
Apr 5 08:18:21 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Attached SCSI disk
Apr 5 08:18:27 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:18:27 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 08:18:27 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:21:36 UNRAID_6 emhttp: shcmd (187): /usr/local/sbin/set_ncq sdo 1 &> /dev/null
Apr 5 08:21:36 UNRAID_6 emhttp: shcmd (188): echo 128 > /sys/block/sdo/queue/nr_requests
Apr 5 08:31:18 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:31:18 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 08:31:18 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:31:22 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:31:22 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 08:31:22 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:31:28 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:31:28 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 HGST_HMS5C4040ALE640_PL1331LAGU5VMH
Apr 5 08:31:28 UNRAID_6 kernel: md: import disk0: (sdo) HGST_HMS5C4040ALE640_PL1331LAGU5VMH size: 3907018532
Apr 5 08:31:37 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:34:34 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 08:34:42 UNRAID_6 emhttp: HGST_HMS5C4040ALE640_PL1331LAGU5VMH (sdo) 3907018532
Apr 5 10:08:24 UNRAID_6 kernel: sysfs group 'power' not found for kobject 'sdo1'
Apr 5 10:08:24 UNRAID_6 kernel: sysfs group 'power' not found for kobject 'sdo'
Apr 5 10:08:24 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Synchronizing SCSI cache
Apr 5 10:08:24 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Synchronize Cache(10) failed: Result: hostbyte=0x04 driverbyte=0x00
Apr 5 10:08:24 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Stopping disk
Apr 5 10:08:24 UNRAID_6 kernel: sd 8:0:7:0: [sdo] Start/Stop Unit failed: Result: hostbyte=0x04 driverbyte=0x00
Apr 5 10:12:42 UNRAID_6 kernel: sd 8:0:8:0: [sdo] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB)
Apr 5 10:12:42 UNRAID_6 kernel: sd 8:0:8:0: [sdo] 4096-byte physical blocks
Apr 5 10:12:42 UNRAID_6 kernel: sd 8:0:8:0: [sdo] Write Protect is off
Apr 5 10:12:42 UNRAID_6 kernel: sd 8:0:8:0: [sdo] Mode Sense: 00 3a 00 00
Apr 5 10:12:42 UNRAID_6 kernel: sd 8:0:8:0: [sdo] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Apr 5 10:12:42 UNRAID_6 kernel: sdo: sdo1 sdo2
Apr 5 10:12:42 UNRAID_6 kernel: sd 8:0:8:0: [sdo] Attached SCSI disk
Apr 5 10:13:16 UNRAID_6 emhttp: WDC_WD40EZRZ-00WN9B0_WD-WCC4E4ZAPCKR (sdo) 3907018532
Apr 5 10:13:23 UNRAID_6 emhttp: WDC_WD40EZRZ-00WN9B0_WD-WCC4E4ZAPCKR (sdo) 3907018532
Apr 5 10:13:23 UNRAID_6 kernel: mdcmd (1): import 0 sdo 3907018532 0 WDC_WD40EZRZ-00WN9B0_WD-WCC4E4ZAPCKR
Apr 5 10:13:23 UNRAID_6 kernel: md: import disk0: (sdo) WDC_WD40EZRZ-00WN9B0_WD-WCC4E4ZAPCKR size: 3907018532
Apr 5 10:13:52 UNRAID_6 emhttp: shcmd (498): /usr/local/sbin/set_ncq sdo 1 &> /dev/null
Apr 5 10:13:52 UNRAID_6 emhttp: shcmd (499): echo 128 > /sys/block/sdo/queue/nr_requests
Apr 5 10:13:52 UNRAID_6 emhttp: writing GPT on disk (sdo), with partition 1 offset 64, erased: 0
Apr 5 10:13:52 UNRAID_6 emhttp: shcmd (532): sgdisk -Z /dev/sdo &> /dev/null
Apr 5 10:13:52 UNRAID_6 kernel: sdo: sdo1 sdo2
Apr 5 10:13:53 UNRAID_6 emhttp: shcmd (533): sgdisk -o -a 64 -n 1:64:0 /dev/sdo |& logger
Apr 5 10:13:54 UNRAID_6 kernel: sdo: sdo1
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#0 CDB: opcode=0x8a 8a 00 00 00 00 01 4c 20 b6 98 00 00 00 20 00 00
Apr 5 21:42:52 UNRAID_6 kernel: blk_update_request: I/O error, dev sdo, sector 5572179608
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#1 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#1 CDB: opcode=0x8a 8a 00 00 00 00 01 4c 24 62 b8 00 00 00 40 00 00
Apr 5 21:42:52 UNRAID_6 kernel: blk_update_request: I/O error, dev sdo, sector 5572420280
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#2 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#2 CDB: opcode=0x8a 8a 00 00 00 00 01 4c 20 96 58 00 00 00 20 00 00
Apr 5 21:42:52 UNRAID_6 kernel: blk_update_request: I/O error, dev sdo, sector 5572171352
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#3 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#3 CDB: opcode=0x8a 8a 00 00 00 00 01 4c 20 94 b8 00 00 00 20 00 00
Apr 5 21:42:52 UNRAID_6 kernel: blk_update_request: I/O error, dev sdo, sector 5572170936
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#4 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#4 CDB: opcode=0x8a 8a 00 00 00 00 01 4c 20 80 58 00 00 00 20 00 00
Apr 5 21:42:52 UNRAID_6 kernel: blk_update_request: I/O error, dev sdo, sector 5572165720
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#5 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#5 CDB: opcode=0x8a 8a 00 00 00 00 01 4c 20 7b 58 00 00 00 a0 00 00
Apr 5 21:42:52 UNRAID_6 kernel: blk_update_request: I/O error, dev sdo, sector 5572164440
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#6 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#6 CDB: opcode=0x8a 8a 00 00 00 00 01 4c 20 79 38 00 00 00 40 00 00
Apr 5 21:42:52 UNRAID_6 kernel: blk_update_request: I/O error, dev sdo, sector 5572163896
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#7 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#7 CDB: opcode=0x8a 8a 00 00 00 00 01 4c 20 77 18 00 00 00 40 00 00
Apr 5 21:42:52 UNRAID_6 kernel: blk_update_request: I/O error, dev sdo, sector 5572163352
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#8 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#8 CDB: opcode=0x8a 8a 00 00 00 00 01 4c 20 76 b8 00 00 00 40 00 00
Apr 5 21:42:52 UNRAID_6 kernel: blk_update_request: I/O error, dev sdo, sector 5572163256
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#9 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 5 21:42:52 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#9 CDB: opcode=0x8a 8a 00 00 00 00 01 4c 20 74 78 00 00 00 60 00 00
Apr 5 21:42:52 UNRAID_6 kernel: blk_update_request: I/O error, dev sdo, sector 5572162680
Apr 6 04:57:24 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 6 04:57:24 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#0 CDB: opcode=0x85 85 06 20 00 00 00 00 00 00 00 00 00 00 40 e5 00
Apr 6 04:57:24 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 6 04:57:24 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#0 CDB: opcode=0x85 85 06 20 00 00 00 00 00 00 00 00 00 00 40 98 00
Apr 6 04:57:24 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 6 04:57:24 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#0 CDB: opcode=0x85 85 06 20 00 00 00 00 00 00 00 00 00 00 40 e5 00
Apr 6 04:57:24 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#0 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00
Apr 6 04:57:24 UNRAID_6 kernel: sd 8:0:8:0: [sdo] tag#0 CDB: opcode=0x85 85 06 20 00 00 00 00 00 00 00 00 00 00 40 98 00

unraid_6-diagnostics-20170406-0549.zip

So as an additional update, the drive that I swapped in seems to be failing, when I restarted the array it still had an "X" beside it and so I went to the info and it shows bad sectors and so I pulled it and checked in Windows and it shows bad sectors and SMART warnings too. So I will have to RMA that drive which is only 5 months old (a WD Blue)

I am still wondering with the first drive that had an issue, it is currently running preclear in my backup server, I guess it could be possible that I have two drives failing

34 minutes ago, crowdx42 said:

so I pulled it and checked in Windows and it shows bad sectors and SMART warnings too

 

There's no SMART report for the failed parity, but if Windows shows pending sectors then it should be replaced.

 

Post the SMART report for the old parity if you want a second opinion.

I have pulled the drive and will RMA it. I am awaiting the preclear on the first parity drive to complete to see if it is also dying. I have 2 8tb external WD drives which I am currently preclearing and hope to replace the existing parity drives with those.