Every now and again, I get an error warning about reading to a hard drive. The System Log show the following error or something similar

Oct 24 11:06:32 Speedy kernel:         res 51/40:88:a8:65:56/00:00:51:00:00/e0 Emask 0x9 (media error)
Oct 24 11:06:32 Speedy kernel: ata7.00: status: { DRDY ERR }
Oct 24 11:06:32 Speedy kernel: ata7.00: error: { UNC }
Oct 24 11:06:32 Speedy kernel: ata7.00: configured for UDMA/133
Oct 24 11:06:32 Speedy kernel: sd 10:0:0:0: [sdi] tag#1 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08
Oct 24 11:06:32 Speedy kernel: sd 10:0:0:0: [sdi] tag#1 Sense Key : 0x3 [current] 
Oct 24 11:06:32 Speedy kernel: sd 10:0:0:0: [sdi] tag#1 ASC=0x11 ASCQ=0x4 
Oct 24 11:06:32 Speedy kernel: sd 10:0:0:0: [sdi] tag#1 CDB: opcode=0x88 88 00 00 00 00 00 51 56 65 a8 00 00 00 88 00 00
Oct 24 11:06:32 Speedy kernel: print_req_error: I/O error, dev sdi, sector 1364616616
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616552
Oct 24 11:06:32 Speedy kernel: ata7: EH complete
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616560
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616568
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616576
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616584
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616592
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616600
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616608
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616616
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616624
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616632
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616640
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616648
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616656
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616664
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616672
Oct 24 11:06:32 Speedy kernel: md: disk2 read error, sector=1364616680

 

This has been ongoing for a few weeks now; it happens once and then doesn't do it again for a number of days, even weeks. I've run the extended SMART test a few times and the history on the disk history page on unraid shows no errors. I've attached below the downloaded report which gives more details; unfortunately, I don't know how to read it and I've been struggling with brain fog a lot recently and trying to work it out is proving difficult, could someone with knowledge of this cast an eye over it to see if in fact there is a disk error or not, as I suspect that the problem lies with either the sata port or the sata cable connecting the drive. I hope that it's the latter as that will be easiest to correct.

TIA

SmartTest-WDC_WD50EFRX-68MYMN1_WD-WX31D55A4NV4-20181026-2052.txt

Edited October 27, 20187 yr by Boyturtle

Looks like a disk problem, though an intermittent one, SMART attributes look good, but there UNC @ LBA errors, and if the errors happened more than once I would replace the disk.

1 hour ago, johnnie.black said:

Looks like a disk problem, though an intermittent one, SMART attributes look good, but there UNC @ LBA errors, and if the errors happened more than once I would replace the disk.

Thanks for your input. I'll get the disk RMA'd back to WD, my 3 year warranty is out at the beginning of December!