root@dots:~# smartctl -l xerror /dev/sdj
smartctl 5.40 2010-07-12 r3124 [x86_64-unknown-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF READ SMART DATA SECTION ===
General Purpose Logging (GPL) feature set supported
SMART Extended Comprehensive Error Log Version: 1 (2 sectors)
Device Error Count: 1
        CR     = Command Register
        FEATR  = Features Register
        COUNT  = Count (was: Sector Count) Register
        LBA_48 = Upper bytes of LBA High/Mid/Low Registers ]  ATA-8
        LH     = LBA High (was: Cylinder High) Register    ]   LBA
        LM     = LBA Mid (was: Cylinder Low) Register      ] Register
        LL     = LBA Low (was: Sector Number) Register     ]
        DV     = Device (was: Device/Head) Register
        DC     = Device Control Register
        ER     = Error register
        ST     = Status register
Powered_Up_Time is measured from power on, and printed as
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,
SS=sec, and sss=millisec. It "wraps" after 49.710 days.

Error 1 [0] occurred at disk power-on lifetime: 1152 hours (48 days + 0 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  84 -- 51 00 41 00 00 55 59 7c 9e 40 00

  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
  61 00 00 00 a0 00 00 55 59 7c 9f 40 08     00:00:41.611  WRITE FPDMA QUEUED
  61 00 00 01 00 00 00 55 59 7c 3f 40 08     00:00:41.613  WRITE FPDMA QUEUED
  60 00 00 03 00 00 00 55 59 7d 3f 40 08     00:00:41.613  READ FPDMA QUEUED
  60 00 00 04 00 00 00 55 59 79 3f 40 08     00:00:41.613  READ FPDMA QUEUED
  60 00 00 01 00 00 00 55 59 78 3f 40 08     00:00:41.613  READ FPDMA QUEUED