Date: Fri, 18 May 2007 23:55:40 -0500 From: Eric Anderson <anderson@freebsd.org> To: Fernando Schapachnik <fernando@schapachnik.com.ar> Cc: freebsd-fs@freebsd.org Subject: Re: Recovering a badly broken disk Message-ID: <464E834C.7060407@freebsd.org> In-Reply-To: <20070519003910.GA3254@funes.schapachnik.com.ar> References: <20070519003910.GA3254@funes.schapachnik.com.ar>
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On 05/18/07 19:39, Fernando Schapachnik wrote: > Hi, > Please excuse if this is out of topic, but I guess is too > specific for -questions. > > A disk with valuable data broke. The system used to perform > backups in a BSD partition on the same disk. Among other things, the > first sectors were damaged and a professional data recovery shop was > able to recover an image of the remaining disk. > > I fdisk'ed as it was originally, then ran scan_ffs, which > was able to found my backup partition, in mountable state. > > I tried to copy the ~170 MB backup tbz files to another > place, but after ~70MB the kernel gives ICRC errors and the copying > stops. The data recovery shop is not able to extract a better image, > so my last chance is to skip the sectors with bad CRC and try > bzip2recover. Unluckily, both cp and bzip2 abort on reading the > faulty part. > > Any ideas on how to skip the faulty part and copy as much as > possible? The partition in question is plain UFS1 on an ATA 80 GB > disk. You might be able to use dd's noerror option to conv to have it skip over any errors. Eric
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