Understanding Disk Compression
When a drive is compressed it looks and feels like a real drive. This is because after compression a new drive letter is assigned to the compressed space. This new space file is called a compressed volume drive (CVF).
The hard drive you compressed became a new drive letter and the CVF file is stored on the uncompressed drive. Confused?
Try picturing this; Drive C is full and needs compression. The Compression Agent will rename that to drive D then compress the contents of that drive and call it drive D. The compressed file CVF is stored on D and then it will become the host drive for C. The new drive D will look and act just as if your old drive C except drive C now has more space on it.
Only drives that have been compressed can have the free space available adjusted.
Today this makes no sense as drive costs are much lower. And you may run into this on older computers or the A+ test.
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