TI 11.0 (build 8,053) Win XP sp2 I made an image of my C: drive on a Lacie 500Gb external drive. All seemed to go well, until I tried to mount the image (in Win XP). Trying to mount it read-only, I got the message "Cannot assign a drive letter to a partition from the backup archive"; and yet it would mount in read-write mode. I then booted from the TI boot disk and tried to verify the image. The progress bar started and all looked fine, but after about 10 minutes it just sat there, with no reassuring clicks coming from the Lacie. After an hour, I tried to cancel out, but, when I confirmed I wanted to cancel, it just went back to the verification screen. I could not shut that screen at all, and ended up having to press the big red button. Somewhere in these forums I saw a moderator ask someone if they were using compressed drives. There was no response, but the Lacie is compressed. So I uncompressed all the partitions on the Lacie. After uncompressing the drive, that same image mounted fine, and verified without problems when I booted from the TI boot disk. Sooooo ... my advice is, don't backup to a compressed drive! I didn't see this advice anywhere in the user guide, and maybe uncompressing my drive and the subsequent disappearance of my problems was just the result of some wild coincidence. However, if you shouldn't back up to compressed drives, it really should be in big red letters in the user guide. This problem took two days out of my life! While I'm typing too much, I'll add a comment on the forums. When I was having problems, I searched extensively for some clue as to what could be going wrong. Many, many posts end with a moderator asking the person to send the output from the Acronis report utility etc to Acronis. The problem is, that's where the thread ends. This means that people like me, searching the threads for useful advice, never see the end result. It would be nice if, when the users problem is solved, the moderator came back with a post to say what caused the problem, and how it was fixed.