Disk Management

Discussion in 'other software & services' started by optigrab, Dec 7, 2003.

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  1. optigrab

    optigrab Registered Member

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    Hi All

    I just "discovered" the Disk Management panel within W2K (Control Panel=> Administrative Tools=> Computer Management => Disk Management). I'm hoping someone here will help me understand what I'm seeing, particularly regarding the "Unallocated" space on my external USB 40Gb drive.
    • Is this a reliable accounting of the disk space, or is it mis-characterising the drive's layout?
    • What is the reason for the large unallocated space?
    • Can I (should I) do anything to "reallocate" this unallocated space? If so, how? (Mind you, I am planning on reformatting and repartitioning from the "Disk Management" panel anyway.)
    I am further confused because Right Click =>Disk Properties reports: "Used Space: 6,655,901,696 bytes (6.19 Gb), Free Space: 33,350,254,592 bytes (31.0 Gb)". This appears to correctly add up to ~40Gb, while the Disk Management display adds up to ~38.3GB total, with 1.01 of that space "unallocated".

    Many thanks,
    Optigrab o_O
     

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  2. LowWaterMark

    LowWaterMark Administrator

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    Well, I don't understand why that display is showing the extra "unallocated" portion, except that maybe the driver that supports the external disk is capable of providing additional space in some other disk format.

    In my experience, all disk drives today are sold with a bit of misleading advertising. When they say a disk is 40GB they almost always mean that the usable space will be approximately 40,000,000,000 bytes. (Same with 20GB, 100GB drives etc.) Now the terms 1KB; 1MB; and 1GB technically translate to: 1024 bytes; 1,048,576 bytes and 1,073,741,824 bytes, but usable space in disk drive sales never translate to this much space. It's just how they are marketed. If you truly had usable space of 40GB that would be 42,949,672,960 bytes. :doubt:

    The image I attached shows my embedded 40GB disk (all allocated to a single partition). The sizes you see there are very close to the usable space you are getting with your external drive. (It is a little disappointing when you buy your first large drive and the usable space is less than you thought - until you find out that this is the way all these drives are sold.)

    I can't imagine that you'd ever be able to use more than 37.2GB from a "40GB" drive.
     

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  3. optigrab

    optigrab Registered Member

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    Location:
    Brooklyn/NYC USA
    Thanks LWM!

    Regards
    Optigrab :D
     
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