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Date:      Thu, 5 Jan 2012 14:42:04 -0500
From:      Janos Dohanics <web@3dresearch.com>
To:        FreeBSD Questions <freebsd-questions@freebsd.org>
Subject:   Apparently conflicting smartctl output
Message-ID:  <20120105144204.d419cca4.web@3dresearch.com>

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Hello Everyone,

I was trying to set up a new gmirror with components ad4 and ad6 in a
machine which already has one, but the new gmirror doesn't finish syncing:

Jan  4 20:21:27 <0.2> isolde kernel: GEOM_MIRROR: Device mirror/gm1 launched (1/1).
Jan  4 21:22:32 <0.2> isolde kernel: GEOM_MIRROR: Device gm1: rebuilding provider ad6.
Jan  4 23:43:50 <0.2> isolde kernel: GEOM_MIRROR: Request failed (error=5). ad4[READ(offset=657053450240, length=131072)]
Jan  4 23:43:50 <0.2> isolde kernel: GEOM_MIRROR: Synchronization request failed (error=5). mirror/gm1[READ(offset=657053450240, length=131072)]

I then ran smartctl short and long tests on both ad4 and ad6:

# smartctl -l error /dev/ad4
smartctl 5.41 2011-06-09 r3365 [FreeBSD 8.2-STABLE amd64] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF READ SMART DATA SECTION ===
SMART Error Log Version: 1
No Errors Logged

No errors logged... but then:

# smartctl -a /dev/ad4
smartctl 5.41 2011-06-09 r3365 [FreeBSD 8.2-STABLE amd64] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Black
Device Model:     WDC WD2002FAEX-007BA0
Serial Number:    WD-WMAY03714307
LU WWN Device Id: 5 0014ee 0ad99b304
Firmware Version: 05.01D05
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Size:      512 bytes logical/physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Thu Jan  5 14:34:13 2012 EST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

[...]

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed: read failure       90%      1863         1283307620
# 2  Short offline       Completed: read failure       90%      1860         1283307620
# 3  Extended offline    Completed: read failure       90%      1742         1283307620

So, my questions are:

- Do I have a bad hard drive (apparently, I do...)

- Why are there "No Errors Logged" by smartctl?

-- 
Janos Dohanics



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