On Tue, 27 Oct 2009 08:31:18 +0100, Grünewald Michaël <michaelgrunew...@yahoo.fr> wrote: > Starting the machine by other means, I found that the hard-drive is > installed on has bad sectors. I am looking for advices on how to > recover from this, if possible.
If there's data on the disk you want to get back, first make a dd copy of the drive or the partition in question. Use an accurately working disk as the target. In case of bad sectors, you should maybe try dd_rescue and ddrescue because they can handle bad sectors often better than the common dd. You'll find them in the ports. After you got your dd copy, work with that for recovery. Do not use the defective disk anymore, only if you messed up the dd copy. A command would look like this: # ddrescue -d -r 3 -n /dev/ad1s1f ads1f.dd ddrescue.log The result is an image of the partition that you can then mount again. # mdconfig -a -t vnode -u 10 -f ad1s1f.dd # mount -o ro /dev/md10 /mnt If the file system isn't intact anymore, there are other tools that may be able to help you, such as recoverdisk, ffs2recov, magicrescue, testdisk, scan_ffs, recoverjpeg, photorec and finally + ultimately, The Sleuth Kit (fls, dls, ils etc.). > Basically the question is: shall I discard my hard-drive with bad- > sectors, or can I continue using it? Discard it. Hard disks are cheap today, and bad sectors may have the habit to multiply. Don't take that risk. BUT: Discard it when you got all your important data off the disk. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ... _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"