I am getting disk errors in my log that I can't figure out, once again they are referencing a device identifier I don't have on my system, in this case sdk. None of the drives in my system are showing errors, in fact they aren't even spun up, the only other thing going on is I am preclearing an 8TB drive that is identified as sdl and about 60% done its zeroing phase. Any ideas? Diags attached.

 

Apr 6 12:34:56 Backup kernel: Buffer I/O error on dev sdk, logical block 17672972, lost async page write

Apr 6 12:34:56 Backup kernel: Buffer I/O error on dev sdk, logical block 17672973, lost async page write

Apr 6 12:34:56 Backup kernel: Buffer I/O error on dev sdk, logical block 17672974, lost async page write

Apr 6 12:34:56 Backup kernel: Buffer I/O error on dev sdk, logical block 17672975, lost async page write

Apr 6 12:34:56 Backup kernel: Buffer I/O error on dev sdk, logical block 17672976, lost async page write

Apr 6 12:34:56 Backup kernel: Buffer I/O error on dev sdk, logical block 17672977, lost async page write

Apr 6 12:34:56 Backup kernel: Buffer I/O error on dev sdk, logical block 17672978, lost async page write

Apr 6 12:34:56 Backup kernel: Buffer I/O error on dev sdk, logical block 17675528, lost async page write

Apr 6 12:34:56 Backup kernel: Buffer I/O error on dev sdk, logical block 17675529, lost async page write

Apr 6 12:34:56 Backup kernel: Buffer I/O error on dev sdk, logical block 17675530, lost async page write

Apr 6 12:35:14 Backup kernel: buffer_io_error: 6 callbacks suppressed

Apr 6 12:35:14 Backup kernel: Buffer I/O error on dev sdk, logical block 17912594, lost async page write

Apr 6 12:35:14 Backup kernel: Buffer I/O error on dev sdk, logical block 17912595, lost async page write

Apr 6 12:35:14 Backup kernel: Buffer I/O error on dev sdk, logical block 17913924, lost async page write

Apr 6 12:35:14 Backup kernel: Buffer I/O error on dev sdk, logical block 17913925, lost async page write

Apr 6 12:35:14 Backup kernel: Buffer I/O error on dev sdk, logical block 17913926, lost async page write

Apr 6 12:35:14 Backup kernel: Buffer I/O error on dev sdk, logical block 17913927, lost async page write

Apr 6 12:35:14 Backup kernel: Buffer I/O error on dev sdk, logical block 17913928, lost async page write

Apr 6 12:35:48 Backup kernel: Buffer I/O error on dev sdk, logical block 16777016, lost async page write

Apr 6 12:35:48 Backup kernel: Buffer I/O error on dev sdk, logical block 16777017, lost async page write

Apr 6 12:35:48 Backup kernel: Buffer I/O error on dev sdk, logical block 16777018, lost async page write

Apr 6 12:35:48 Backup kernel: Buffer I/O error on dev sdk, logical block 16777019, lost async page write

Apr 6 12:35:48 Backup kernel: Buffer I/O error on dev sdk, logical block 16777020, lost async page write

Apr 6 12:35:48 Backup kernel: Buffer I/O error on dev sdk, logical block 16777021, lost async page write

Apr 6 12:35:48 Backup kernel: Buffer I/O error on dev sdk, logical block 16777022, lost async page write

Apr 6 12:35:48 Backup kernel: Buffer I/O error on dev sdk, logical block 16777023, lost async page write

Apr 6 12:35:48 Backup kernel: Buffer I/O error on dev sdk, logical block 16777024, lost async page write

Apr 6 12:35:48 Backup kernel: Buffer I/O error on dev sdk, logical block 16777025, lost async page write

Apr 6 12:37:07 Backup kernel: buffer_io_error: 7 callbacks suppressed

Apr 6 12:37:07 Backup kernel: Buffer I/O error on dev sdk, logical block 17193462, lost async page write

Apr 6 12:37:12 Backup kernel: Buffer I/O error on dev sdk, logical block 18485022, lost async page write

Apr 6 12:37:12 Backup kernel: Buffer I/O error on dev sdk, logical block 18485023, lost async page write

Apr 6 12:37:12 Backup kernel: Buffer I/O error on dev sdk, logical block 18485024, lost async page write

Apr 6 12:37:16 Backup kernel: Buffer I/O error on dev sdk, logical block 17244462, lost async page write

Apr 6 12:37:16 Backup kernel: Buffer I/O error on dev sdk, logical block 17244463, lost async page write

Apr 6 12:37:16 Backup kernel: Buffer I/O error on dev sdk, logical block 17244464, lost async page write

Apr 6 12:37:16 Backup kernel: Buffer I/O error on dev sdk, logical block 17244465, lost async page write

Apr 6 12:37:16 Backup kernel: Buffer I/O error on dev sdk, logical block 17245916, lost async page write

Apr 6 12:37:20 Backup kernel: Buffer I/O error on dev sdk, logical block 15901555, lost async page write

backup_tower-diagnostics-20160406-1239.zip

How's your SMART for it? Is it clean? Bad blocks? Timeouts?

If you mean the 8TB drive I am preclearing currently:

 

1	Raw read error rate	0x000f	079	064	044	Pre-fail	Always	Never	76251840
3	Spin up time	0x0003	096	096	000	Pre-fail	Always	Never	0
4	Start stop count	0x0032	100	100	020	Old age	Always	Never	2
5	Reallocated sector count	0x0033	100	100	010	Pre-fail	Always	Never	0
7	Seek error rate	0x000f	069	060	045	Pre-fail	Always	Never	8412757
9	Power on hours	0x0032	100	100	000	Old age	Always	Never	22 (188 60 0)
10	Spin retry count	0x0013	100	100	097	Pre-fail	Always	Never	0
12	Power cycle count	0x0032	100	100	020	Old age	Always	Never	2
184	End-to-end error	0x0032	100	100	099	Old age	Always	Never	0
187	Reported uncorrect	0x0032	100	100	000	Old age	Always	Never	0
188	Command timeout	0x0032	100	100	000	Old age	Always	Never	0
189	High fly writes	0x003a	100	100	000	Old age	Always	Never	0
190	Airflow temperature cel	0x0022	066	062	040	Old age	Always	Never	34 (min/max 15/38)
191	G-sense error rate	0x0032	100	100	000	Old age	Always	Never	0
192	Power-off retract count	0x0032	100	100	000	Old age	Always	Never	1
193	Load cycle count	0x0032	100	100	000	Old age	Always	Never	2
194	Temperature celsius	0x0022	034	040	000	Old age	Always	Never	34 (0 15 0 0 0)
195	Hardware ECC recovered	0x001a	079	005	000	Old age	Always	Never	76251840
197	Current pending sector	0x0012	100	100	000	Old age	Always	Never	0
198	Offline uncorrectable	0x0010	100	100	000	Old age	Offline	Never	0
199	UDMA CRC error count	0x003e	200	200	000	Old age	Always	Never	0
240	Head flying hours	0x0000	100	253	000	Old age	Offline	Never	213567248793622
241	Total lbas written	0x0000	100	253	000	Old age	Offline	Never	9769136000
242	Total lbas read	0x0000	100	253	000	Old age	Offline	Never	16075502322

Considering you are basically dealing with a "Ghost"/non-existing drive, I'd be tempted to think your config has suffered some sort of glitch. As such, if I would personally "tools-new config" my box and let parity rebuild, but that's just me...your call.

When I am done pre clearing this drive, I am going to reboot, see if the errors go away, and then I may do a parity check just to make sure.

 

Thanks

 

Good Luck!