[Bug-ddrescue] ddrescue 1.2 crashes without writing mapfile

[bill evergreen]

Hello

I am trying to image a harddisk with defect sectors. When the system tries
to read the bad sectors, the following happend: Either:

-  the whole machine crashes (Kernel: 3.5.0-30-generic). Removing the power
is required, in order to reboot.
or
-  ddrescue crashes and dismounts the harddisk


I use the command #ddrescue -v -n /dev/sdc
/media/root/recovered/20160321.dd ddmapfile.txt


Questions:
1.
Why no mappfile.txt is written to the target device (
/media/root/recovered/)
(recovered/20160321.dd is written to disk:-)   ?

2.
Is there a way to add the remaining part of the disk (after a reboot) to
the already existing recovered/20160321.dd  (e.g. with "ddrescue -v -R -n
and ddrescue -v -R -r1") ?



Thank you very much for any feedbacl!

Bill



Kernel: 3.5.0-30-generic