Hello Paul,
For some reason, the spam filter of bug-ddrescue deleted your message.
Paul L Daniels wrote:
I've been doing quite a lot of HDD rescues and the GNU ddrescue is one of the
tools I use most frequently, however I've come across a quirk when using it.
If I copy an image back to a new fresh drive using ( source image can be either
on another USB3 connected drive or local SATA internal drive) :
ddrescue -v -f myimage.img /dev/sdc
I'll get full 100~120MB/sec performance out of USB3 or eSATA... however, if I
do this...
ddrescue -i 50G -v -f myimage.img /dev/sdc
It'll drop to 20~30MB/sec performance. I've noticed this behaviour on several
systems, including USB2 based devices.
Any specific reason why this should happen?
Well, no.
Have you tried a multiple of 64KiB for -i (for example "-i 50GiB")?
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