[Dirvish] Repair failed image.. is it possible?

[hanj]

Hello All

I have a interesting and annoying situation. On one remote server, I'm
having issues with corrupted MAC via SSH and my session disconnects.
This appears to be a hardware problem somewhere on my route.. and I'm
working with my ISP's network admins on the problems. Now.. the
question to you. When this happens, my dirvish image fails since I'm
disconnected in the middle of the backup.

Is it possible to repair the image? Currently, I have to delete the
dated folder and try again, and cross my fingers it doesn't fail on
this try. I would really like to just repair the image from the point
it failed.

I tried copying files, etc from 'good' images, but it doesn't see them
for the next pass the following day.

Thanks!
hanji