Date: Sun, 04 Oct 2009 13:43:18 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Patrick Proniewski <patpro@patpro.net> Cc: freebsd-fs@freebsd.org Subject: Re: Offline uncorrectable sectors on hard drive Message-ID: <4AC88A56.6080806@quip.cz> In-Reply-To: <5AFF10D8-2B03-4DE8-83E8-20B6A832BBA8@patpro.net> References: <C09E0617-F326-4AB1-BFF5-6814CD084940@patpro.net> <4AC861BF.20109@fuckner.net> <5AFF10D8-2B03-4DE8-83E8-20B6A832BBA8@patpro.net>
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Patrick Proniewski wrote: > Hi Michael, > > On 4 oct. 09, at 10:50, Michael Fuckner wrote: > >>> - is that "Offline uncorrectable sectors" in fact correctable? I've >>> found howto's for extfs and reiserfs to correct this kind of error >>> by remapping bad sectors, but nothing for UFS. >>> - this error appears to have disappeared, does it mean the harddrive >>> (or the fs) made the remapping by it self? >> >> sector errors are on the hardware, they don't deal with the filesystem. >> >> Perhaps it was a once in a lifetime event, perhaps the drive is going >> to die really soon. >> >> Please do a smartctl -t long and see if the drive has to be replaced. > > > > here is the result (from `smartctl -l selftest /dev/ad6` after the > `smartctl -t long /dev/ad6` ): > > Warning! SMART Attribute Thresholds Structure error: invalid SMART > checksum. > === START OF READ SMART DATA SECTION === > SMART Self-test log structure revision number 1 > Num Test_Description Status Remaining > LifeTime(hours) LBA_of_first_error > # 1 Extended offline Completed without error 00% > 34350 - > # 2 Short offline Completed without error 00% > 34339 - > # 3 Extended offline Completed: read failure 20% > 34317 201626851 > # 4 Short offline Completed without error 00% [...] > It looks like the error is gone, but may be I'm wrong. It is better to look at diff of Vendor Specific Attributes (smartctl -A) You have Reallocated_Event_Count 2, so maybe bad sectors were reallocated. Miroslav Lachman
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