Date: Wed, 10 Nov 2004 17:07:42 -0800 From: Matt Staroscik <matt@wrongcrowd.com> To: freebsd-questions@freebsd.org Cc: Jerry McAllister <jerrymc@clunix.cl.msu.edu> Subject: Fixing bad blocks (was: Re: Do you need to dismount /usr to dump it?) Message-ID: <6.1.2.0.2.20041110165617.0ac48840@wrongcrowd.com> In-Reply-To: <20041110211807.541E016A4F6@hub.freebsd.org> References: <20041110211807.541E016A4F6@hub.freebsd.org>
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At 01:18 PM 11/10/2004, you wrote: >Your problem seems to be bad blocks in the /usr file system. >That has nothing to do with dump. It is a bad spot on the disk. >fsck will not fix that sort of thing. If you can figure out >what files sit on the bad spots, you might be able to delete them >and then do your dump. Then you should immediately replace the >disk. I tarred up all of /usr to another filesystem, and I did see an error reading a core dump file from squid. I deleted the file and I was then able to dump /usr successfully. So that's good news. However, I apparently need to fix the bad blocks before my RAID will rebuild. (I had hoped it would do file-wise copies, but it looks like it does lower level reading.) It is my understanding that an IDE disk will only remap a bad block on a write, not just a read. My plan is to load up /usr with enough files to fill it up; this should write to the bad blocks and force them to be remapped to spares. I am hopeful that the drive is still healthy, as it only shows 2 SMART errors. (Can a core dump cause a bad block or two?) (Of course, the 3ware twe driver may not allow rebuilds yet on the 7000 cards, so I may have to try a Knoppix CD too.) Thanks to all for the input. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Matt Staroscik * KF6IYW * mstar@speakeasy.net * http://wrongcrowd.com "The combined weight of the horrors I have authored wrought would crush your carbon hearts into perfect diamonds of terror." -- Leonid Kasparov Destroyovitch
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