[smartmontools-support] READ FPDMA QUEUED failure

[Alex]

Hi, can someone help me determine if my disk is failing? This was a
week ago, and it appears the system is still functioning, but there
have been a series of these over the last few weeks.

This is part of a 4-disk 8TB md RAID5 made up of 3TB disks. Here is
the error message, with more info below.

[Sun Dec  2 01:01:47 2018] ata4.00: exception Emask 0x0 SAct
0x3ffffff8 SErr 0x0 action 0x0
[Sun Dec  2 01:01:47 2018] ata4.00: irq_stat 0x40000008
[Sun Dec  2 01:01:47 2018] ata4.00: failed command: READ FPDMA QUEUED
[Sun Dec  2 01:01:47 2018] ata4.00: cmd
60/40:18:00:fd:7e/05:00:00:00:00/40 tag 3 ncq dma 688128 in
                                    res
41/40:00:80:fd:7e/00:00:00:00:00/40 Emask 0x409 (media error) <F>
[Sun Dec  2 01:01:47 2018] ata4.00: status: { DRDY ERR }
[Sun Dec  2 01:01:47 2018] ata4.00: error: { UNC }
[Sun Dec  2 01:01:47 2018] ata4.00: configured for UDMA/133
[Sun Dec  2 01:01:47 2018] sd 3:0:0:0: [sdd] tag#3 FAILED Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
[Sun Dec  2 01:01:47 2018] sd 3:0:0:0: [sdd] tag#3 Sense Key : Medium
Error [current]
[Sun Dec  2 01:01:47 2018] sd 3:0:0:0: [sdd] tag#3 Add. Sense:
Unrecovered read error - auto reallocate failed
[Sun Dec  2 01:01:47 2018] sd 3:0:0:0: [sdd] tag#3 CDB: Read(16) 88 00
00 00 00 00 00 7e fd 00 00 00 05 40 00 00
[Sun Dec  2 01:01:47 2018] print_req_error: I/O error, dev sdd, sector 8322432
[Sun Dec  2 01:01:47 2018] ata4: EH complete
[Sun Dec  2 01:01:56 2018] ata4.00: exception Emask 0x0 SAct
0xffffffff SErr 0x0 action 0x0
[Sun Dec  2 01:01:56 2018] ata4.00: irq_stat 0x40000008
[Sun Dec  2 01:01:56 2018] ata4.00: failed command: READ FPDMA QUEUED
[Sun Dec  2 01:01:56 2018] ata4.00: cmd
60/08:20:80:fd:7e/00:00:00:00:00/40 tag 4 ncq dma 4096 in
                                    res
41/40:00:80:fd:7e/00:00:00:00:00/40 Emask 0x409 (media error) <F>
[Sun Dec  2 01:01:56 2018] ata4.00: status: { DRDY ERR }
[Sun Dec  2 01:01:56 2018] ata4.00: error: { UNC }
[Sun Dec  2 01:01:56 2018] ata4.00: configured for UDMA/133
[Sun Dec  2 01:01:56 2018] sd 3:0:0:0: [sdd] tag#4 FAILED Result:
hostbyte=DID_OK driverbyte=DRIVER_SENSE
[Sun Dec  2 01:01:56 2018] sd 3:0:0:0: [sdd] tag#4 Sense Key : Medium
Error [current]
[Sun Dec  2 01:01:56 2018] sd 3:0:0:0: [sdd] tag#4 Add. Sense:
Unrecovered read error - auto reallocate failed
[Sun Dec  2 01:01:56 2018] sd 3:0:0:0: [sdd] tag#4 CDB: Read(16) 88 00
00 00 00 00 00 7e fd 80 00 00 00 08 00 00
[Sun Dec  2 01:01:56 2018] print_req_error: I/O error, dev sdd, sector 8322432
[Sun Dec  2 01:01:56 2018] ata4: EH complete
[Sun Dec  2 01:01:57 2018] md/raid:md2: read error corrected (8
sectors at 8320384 on sdd1)

# hdparm -i /dev/sdd

/dev/sdd:

 Model=WDC WD30EFRX-68EUZN0, FwRev=82.00A82, SerialNo=WD-WCC4N6TEK8TN
 Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=unknown, MaxMultSect=16, MultSect=16
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=5860533168
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6
 AdvancedPM=no WriteCache=enabled
 Drive conforms to: Unspecified:  ATA/ATAPI-1,2,3,4,5,6,7

 * signifies the current active mode

I also ran a "--test long" on the disk and it passed without error.

md2 : active raid5 sde1[5] sdd1[1] sdf1[4] sdc1[0]
      8790402048 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU]
      bitmap: 0/22 pages [0KB], 65536KB chunk

Thanks,
Alex