My "Disk format not supported"

[rAph]

When I try to run Disk Compressor from Parallels, it executes the first stage of compression, but then it asks to reboot. The computer loads back up, but I get a "this disk format is not supported" error. Any ideas?

 

[Andrew @ Parallels]

Probably all your virtul disks are not compressed (but plain). For plain disks actual compression is not available because they allocate fixed maximum size by design.