Parallels Compressor on Mac fails to complete

G

gilbreen

Bit poster
I am trying to use Compressor (the one included in Parallels for Mac). It starts ok and the goes to a reboot. After the reboot it continues the process, defrags the HD and then I get a message window that states:

Compacting of this disk format is not supported.

Task has been aborted.
Click Finish to exit Parallels Compressor.

My C: drive is formatted as NTFS. I am not using the expanding disk format as I had heard that performance is better with a plain (non-expanding) hard disk.

Perhaps that is my issue, but I couldn't find a definitive answer.

Any ideas?
 
I believe the Parallels compacting tool is designed for use with an expanding disk, not a fixed size disk as you have.
 
The whole point of Compressor is to reduce the space the virtual drive takes on the host file system. here's no point running it on a non-expanding drive.

BTW, while I've heard that "someone said" the plain drive runs faster, I'd like to see some hard evidence. What is it faster at? Is it always faster, or just when adding files? What sort of access makes no difference? Anybody have some actual hard data?

I suspect that unless data is being added, a plain disk carries little advantage if any, but I'd love some data.
 
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