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"Unknown" space problem

Last response: in Systems
January 15, 2013 8:23:50 PM

I recently bought a new build that is great, but now i have just noticed that i am missing about 1tb of storage on my second storage drive.
I have used windirstat and spacesniffer and found that there was 946gb of "unknown" space that is "yet to be scanned". I have tried to google it but to no avail. i don't know what might be causing this and i am hoping for any advice or help.

Here are my PC specs:
AMD FX-6300
Gigabyte GA-990-FXA-UD3
Corsair vengeance 8Gb (2x4Gb)
Asus GTX 550 Ti 1gb
Hitachi 750gb (OS drive)
Samsung HD204UI 2TB (Storage)

I am running Windows 7 Home edition 64-bit.

More about : unknown space problem

a c 79 G Storage
January 15, 2013 9:02:44 PM

Have a look in Disk Management. It may simply be unallocated (unpartitioned) space.
Control Panel > Admin Tools > Computer Management > Disk Management
Look in the bottom-right panel and find the ribbon which relates to the storage drive.
It may reveal more info about the "unknown" space.
January 16, 2013 3:35:48 PM

I have just had a look and it says that all of the drive is the same partition and that there is no "unknown" space, even though windirstat and spacesniffer says there is.