I was having problems with Defraggler running extremely slowly or just not accomplishing anything at all. I just d/led the very newest version and it doesn't seem to have affect this bug at all.
I was defragging a highly fragmented (~70%) 500Gb external drive that I use for video storage and backups. I had several very large files (a few 2-4gb and 2-3 20+gb) on this drive. Drefraggler seemed to be working, but if you watch it, it moved a fragment to one block, then back, then to another, than back and repeats. It seemed to pick 2-3 blocks and just rotated the same couple fragments around in them, and never got anything done.
It was very frustrating.
update: ran the "Check Drive for Errors" tool within Defraggler. It immediately detected many corrupt attribute records and orphan file records. Could this have something to do with the previously reported problems with Defraggler messing with the MFT??
update: At least twice as annoyed and extremely angry in addition, now.
After running the Verify Disk utility, Defraggler has deleted several .rar archive files from my drive as well as an incremental backup file.
Several of these were rather important and are now completely unrecoverable.
They still appear on the drive, but show as 0 bytes. Any attempt to access them says they are "unknown format or damaged".
update: Tried downloading Recuva to restore the files, but it says it cannot restore a file of size 0 bytes. All my .rar archives are pretty much destroyed, along with content and backups that do not exist elsewhere - as this was a backup drive.
I have used Defraggler for a long time and never had any problems with it...but this sort of failure is completely unacceptable! What is going on with this software???