On 11/18/2016 06:25 AM, Richard Owlett wrote:
As noted in the "Invoking ddrescue" thread
[https://lists.debian.org/debian-user/2016/11/msg00641.html], my laptop
[dedicated to educational/experimental projects which could fail
spectacularly] used to apparently successfully run ddrescue, malfunctioned.
<*BACKGROUND*>
The laptop is a used Lenovo R61 running Debian 8.6.0 with MATE D.E.
installed from purchased set of DVDs. The "damaged" and destination
drives were connected by separate USB adapters [each powered by separate
wall warts].
Don't use USB external SSD/ HDD enclosures for low-level work. You want
to connect your HDD's to a SATA motherboard connector or
known-Linux-good HBA in a desktop or server chassis.
David