have been happily Defraggling for quite a while now, but after using the latest version for the first time, machine failed to boot with the above message...let me quickly say that there is no evidence that this was due to Defraggler, BUT I thought I'd better post on the subject for the benefit of others...'could be just a coincidence, of course.
have had to leave it for a few days while I consider the options for reviving the disk...maybe one of you folks has a recommended approach...so far it seems it will need to be pulled and attached to one of the other machines...let me know if you have any tips.
N.B. the "damage" is reported differently depending on which program I use to address the disk/problem.
regards
DaveH