Computer Management fails to show disk usage

[Beemer2]

I have five Sata drives. Of these five, Windows 7 Pro 64 "Computer management" reports that two of them still are 100% free despite both having significant usage as reported in "Computer" and "Explorer"



F: Simple, Basic, NTFS, Healthy, Primary partition,

"Computer management" Capacity 92.21GB Free 92.21GB
"Computer" Capacity 92.2 GB Free 16.8GB

L: Simple, Basic, NTFS, Healthy, Primary partition,

"Computer management" Capacity 389.59GB Free 389.59GB
"Computer" Capacity 389GB Free 379GB

The L: drive is newly installed and only ebook files are on it. What might have caused this and can it be corrected?

 

[Pauly]

How are you looking at drives ?
Please post a screen shot of your maximised disk management
Start>type diskmgmt.msc>enter
http://www.sevenforums.com/tutorials/9733-screenshots-files-upload-post-seven-forums.html