[mdlug] Recover data from zeroed drive

[Robert Citek]

Hello all,

A client recently zeroed their drive with this:

   dd if=/dev/zero of=/dev/sdb

when they meant to do this:

   dd if=/dev/zero of=/dev/sdd

That last letter turned out to be a subtle, but important, difference.

Any recommendations of tools for recovering the data from the drive?

The Googles are telling me that recovery is not impossible, just
extremely unlikely:

http://skeptics.stackexchange.com/questions/13674/is-it-possible-to-recover-data-on-a-zeroed-hard-drive

P.S. they have backups, but it would be nice to recover data since the
last backup.

Regards,
- Robert