Re: [Bug-ddrescue] When will ddrescue return to warp speed?

[Antonio Diaz Diaz]

James Watts wrote:
> I am currently rescuing a 500GB drive. When I first started ddrescue, the
> routine began recovering data at the blistering rate of 18-20 MB/s. Then it
> encountered an error (after recovering about 20GB) and the drive got hung-up
> and did not respond to commands. So I had to turn off the drive, turn it on
> again, and restart ddrescue. Now, it's been going for two days holding at a
> rate of 300-500 KB/s. It has not encountered any more errors according to
> the on-screen info and the log (see below). So why will it not ramp up to
> the high-speed from before? At this rate, it could take weeks to complete.

Did you only reset the drive (/dev/sdb) instead of rebooting the whole 
computer? Maybe the controller or even the kernel switched to a slower 
mode after the error.


> Thoughts? Am I doing something wrong? What would you do differently?

If the reboot doesn't work, I would try to stop ddrescue and restart it 
at the next multiple of 64KiB. (The next position with four trailing 
zeros: 0xD2C290600 ==> 0xD2C2A0000).


Regards,
Antonio.