Undelete or recover from badblocks on disks

Roland Smith rsmith at xs4all.nl
Fri Sep 18 05:24:25 UTC 2009

On Thu, Sep 17, 2009 at 05:37:34PM -0700, jaymax wrote:
> I seemed to have lost some critical dump files during a restore. The
> directory in which they were backed up in seemed to vaporize. The data was
> present as indicated by df -h but the directory was not listed.
> fsck on the disk was ineffective
> fsck_ffs produced an extensive listing of bad block, a final SALVAGE option,
> but on completion, the disk "capacity" from the df -h was significantly
> reduced. 
> Is there anyway of recovering even 'partial' data from these lost blocks?
> The drive has been disconnected so that there would be no 'write'
> activities?

Check the disk with  smartctl(8) from the sysutils/smartmontools port to check
that this isn't a hardware malfunction. If it is a hardware malfunction, the
disk is dying and should be replaced ASAP.

If the hardware is OK, try fls from sysutils/sleuthkit. As long as the data
isn't overwritten, it should still be there.

R.F.Smith                                   http://www.xs4all.nl/~rsmith/
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