Windows 8 and 8.1 Forums


Partition Puzzlement. The numbers don't add up.

  1. #1


    Posts : 562
    W10 x64 pro and W8.1 x86

    Partition Puzzlement. The numbers don't add up.


    I'm sure there is probably a simple explanation to this...

    I've just fitted a new 250Gb SSD to my laptop (awesome results by the way) and I'm puzzled over how to interpret the Diskpart info. I partitioned the drive into four partitions of, C=70Gb, D=30Gb, Y=100Gb and Z=30Gb which is shown in Disk Management correctly. Diskpart however lists an extra 'Partition 0' of 132Gb. Puzzled
    Attached Thumbnails Attached Thumbnails Disk Management.PNG   Diskpart.PNG  

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  2. #2



    Trying to Sith things out
    Bamberg Germany
    Posts : 2,290
    Windows 10 Pro 64 bit


    Acronis+recovery+free space=132GB
    You used MBR partitioning instead of GPT right?
    Click image for larger version
    Extended partition[edit]

    Further information: Extended Boot Record
    An HDD may contain only one extended partition, but that extended partition can be subdivided into multiple logical partitions. DOS/Windows systems may then assign a unique drive letter to each logical partition.
      My System SpecsSystem Spec

  3. #3


    Posts : 562
    W10 x64 pro and W8.1 x86


    Hi Cliff.

    I clean installed W8.1 onto unallocated space on the new drive by using the install disk to create the first partition. I made that deliberately small and then expanded it to 70Gb later, finally creating the other partitions in order. All done using Windows Disk Management.

    Ah, I think I get it now... the extended is the addition of the logical drives PLUS the free space.

    GPT. I'm just looking that up now (lol)... no, my PC doesn't support UEFI so it was just a traditional install.
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  4. #4



    Trying to Sith things out
    Bamberg Germany
    Posts : 2,290
    Windows 10 Pro 64 bit


    Quote Originally Posted by Mooly View Post
    .

    Ah, I think I get it now... the extended is the addition of the logical drives PLUS the free space.
    Yup!
      My System SpecsSystem Spec

  5. #5


    Posts : 562
    W10 x64 pro and W8.1 x86


    Thanks Cliff. Another one solved and resolved
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  6. #6



    Trying to Sith things out
    Bamberg Germany
    Posts : 2,290
    Windows 10 Pro 64 bit


    Quote Originally Posted by Mooly View Post
    Thanks Cliff. Another one solved and resolved
    No problem, one of the advantages of GPT(aside from UEFI) is you don't need logical partitions inside of and extended, you can have hundreds of partitions, where as MBR you can create a maximum of 4 Primary partitions, or 3 Primary partitions and 1 Extended partition with up to 128 logical volumes in the extended partition on a single hard disk.
      My System SpecsSystem Spec

  7. #7


    Posts : 562
    W10 x64 pro and W8.1 x86


    Thanks for the further explanations Cliff, appreciate it
      My System SpecsSystem Spec

  8. #8



    Trying to Sith things out
    Bamberg Germany
    Posts : 2,290
    Windows 10 Pro 64 bit


    Quote Originally Posted by Mooly View Post
    Thanks for the further explanations Cliff, appreciate it
    You're welcome Mooly
      My System SpecsSystem Spec

Partition Puzzlement. The numbers don't add up.
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