Re: [Bug-ddrescue] Lack of an ETA.

[Felix Ehlermann]

Dear Theo,

I'm not sure if you do have to go through the trouble of recovering the 
data from the failed disc with ddrescue at all.

As you wrote:

>  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,

If you are running a RAID-5 with 3 drives it would mean that the array 
is still operational *without any data-loss* with two working drives 
remaining.
The array has lost its fault-tolerance because one disk failed, so it 
might not start automatically (depending on what solution you're using 
for RAID), but if the other two disks are not damaged they will hold all 
of your data (in a similar way a RAID-0 would store them).
So if your data is not accessible right now you might be more effective 
using a different approach (fixing the degraded array or just starting 
the degraded array and making a backup copy immediately to another media).

Regarding the ETA:
I can not imagine how ddrescue would be able to know how many damaged 
sectors it will find on the hard disk and how many of them it will be 
able to read at what speed - so any ETA which was given by the program 
would not be reliable.


Kind Regards
Felix Ehlermann