Date: Thu, 11 Nov 2004 10:18:30 -0500 (EST) From: Jerry McAllister <jerrymc@clunix.cl.msu.edu> To: matt@wrongcrowd.com (Matt Staroscik) Cc: freebsd-questions@freebsd.org Subject: Re: Fixing bad blocks (was: Re: Do you need to dismount /usr to Message-ID: <200411111518.iABFIUx24295@clunix.cl.msu.edu> In-Reply-To: <6.1.2.0.2.20041110165617.0ac48840@wrongcrowd.com> from "Matt Staroscik" at Nov 10, 2004 05:07:42 PM
next in thread | previous in thread | raw e-mail | index | archive | help
> > 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?) A core dump will not create bad blocks. They are usually due to bad spots on the disk - it is physical. You could see if there is a surface scan available in your bios or some accompanying diagnostic utilities. But, the reality is that if you start actually seeing bad blocks reported, then there is a strong likelyhood that the disk has already had others that were concealed by the automatic remapping and is coming near to its demise. So, that makes it a good time to replace the drive rather than leaving yourself open to problems later - and maybe not so much later either. So, good luck, ////jerry > > (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 > > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200411111518.iABFIUx24295>