[Bug-ddrescue] Lack of an ETA.

[Théo Koelz]

Hello,

First of all thanks for making this very useful software. 

I think there's a problem with ddrescue : the lack of an estimated time
for accomplishment. 

Here's why : at the moment I'm cloning a 1TB hard drive with bad sectors
to an other healthy drive (both connected in SATA) and for 400GB or so
it went smoothly (pretty fast done in a few hours) but now it's being
incredibly slow for 2 days or so (with speeds ranging from 1000B/s to
60000B/s). It would be good if ddrescue was able to tell us an ETA
because now I can only wonder if my drive is going to be stuck like this
for years or if the damaged area is only of a few gigas which would
"only" take a week.

In my case this is one of 3 disks of a raid 5 array, right now I'm not
sure how much of my datas the 2 other disk still have, maybe most of it,
my initial strategy to recover the datas was to ddrescue the disk with
bad sectors first, but now that I realize this could take months or
years I may have to try to recover my datas from the other two disks
alone first. So having an estimate of the time it would take is crucial.

I also wonder, is there a way to speed up the process even if it means a
lower quality cloning? 

Further informations :
the command I use : ddrescue -f -n /dev/sde /dev/sdf logfile
currently 408749MB rescued and 9 errors (errsize : 762kB)

Best regards,
TK.