I recent bought two 4tb SAS drives off ebay.  1 of the 2 passed preclear and I added it to the array.  The second drive keeps aborting around 3-4% of the pre-read.

here is the disk log:

 

	Feb 16 01:08:19 DarkTower kernel: sd 9:0:3:0: [sdm] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB)

	Feb 16 01:08:19 DarkTower kernel: sd 9:0:3:0: [sdm] Write Protect is off

	Feb 16 01:08:19 DarkTower kernel: sd 9:0:3:0: [sdm] Mode Sense: f7 00 10 08

	Feb 16 01:08:19 DarkTower kernel: sd 9:0:3:0: [sdm] Write cache: enabled, read cache: enabled, supports DPO and FUA

	Feb 16 01:08:19 DarkTower kernel: sd 9:0:3:0: [sdm] Attached SCSI disk

	Feb 16 01:09:06 DarkTower emhttpd: HUS724040ALS640_PBH5HB3X (sdm) 512 7814037168

	Feb 17 11:06:37 DarkTower preclear_disk_PBH5HB3X[13123]: Command: /usr/local/emhttp/plugins/preclear.disk/script/preclear_disk.sh --cycles 1 --no-prompt /dev/sdm

	Feb 17 11:06:41 DarkTower preclear_disk_PBH5HB3X[13123]: Pre-Read: dd if=/dev/sdm of=/dev/null bs=2097152 skip=0 count=4000787030016 conv=notrunc iflag=nocache,count_bytes,skip_bytes

	Feb 17 11:22:39 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08

	Feb 17 11:22:39 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 Sense Key : 0x3 [current] [descriptor]

	Feb 17 11:22:39 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 ASC=0x11 ASCQ=0x0

	Feb 17 11:22:39 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 CDB: opcode=0x88 88 00 00 00 00 00 13 30 c8 00 00 00 02 00 00 00

	Feb 17 11:22:39 DarkTower kernel: print_req_error: critical medium error, dev sdm, sector 321964394

	Feb 17 11:22:41 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08

	Feb 17 11:22:41 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 Sense Key : 0x3 [current] [descriptor]

	Feb 17 11:22:41 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 ASC=0x11 ASCQ=0x0

	Feb 17 11:22:41 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 CDB: opcode=0x88 88 00 00 00 00 00 13 30 c9 68 00 00 00 08 00 00

	Feb 17 11:22:41 DarkTower kernel: print_req_error: critical medium error, dev sdm, sector 321964394

	Feb 17 11:22:41 DarkTower kernel: Buffer I/O error on dev sdm, logical block 40245549, async page read

	Feb 17 11:22:43 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08

	Feb 17 11:22:43 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 Sense Key : 0x3 [current] [descriptor]

	Feb 17 11:22:43 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 ASC=0x11 ASCQ=0x0

	Feb 17 11:22:43 DarkTower kernel: sd 9:0:3:0: [sdm] tag#1579 CDB: opcode=0x88 88 00 00 00 00 00 13 30 c9 68 00 00 00 08 00 00

	Feb 17 11:22:43 DarkTower kernel: print_req_error: critical medium error, dev sdm, sector 321964394

	Feb 17 11:22:43 DarkTower kernel: Buffer I/O error on dev sdm, logical block 40245549, async page read

	Feb 17 11:22:46 DarkTower preclear_disk_PBH5HB3X[13123]: Pre-Read: dd output: dd: error reading '/dev/sdm': Input/output error

	Feb 17 11:22:47 DarkTower preclear_disk_PBH5HB3X[13123]: cat: /tmp/.preclear/sdm/smart_error: No such file or directory



	[/CODE]

 

I'm assuming this is a bad disk I shroud try to return, what exactly should I tell them is wrong with the disk?  I don't really understand the error codes, Im guessing a sector is bad or about to go bad.  Thanks for any info/help.

Run a long SMART test.

Ok I tried running a long smart test, looks like it failed. I tried at least twice.

darktower-smart-20200218-0605.zip

It did, disk has bad sectors.

Thanks. I'll try to get a refund.