See http://malthus.zapto.org/viewtopic.php?f=2&t=841
A data recovery professional writes ...
"The drive did have problems imaging on the [Deepspar Disk Imager] going
forward but in reverse it worked perfectly and I have recovered all data."
BTW, the OP in the abovementioned thread needed to disable reallocation
before he could talk to the drive via SATA. After disabling reallocation
(via the serial console, using ConGen commands), he could probably have
used ddrescue ... in reverse.
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