How do I add Unallocated partition to my main partitiion in XP 32

Posted on 2010-01-05
Last Modified: 2013-11-30

I recently reinstalled Windows XP Professional  (32 bit) and after the install I noticed the in the Control Panel > Computer Management > Storage > Disk Management that the C: drive has two partitions.   The entire dirve size is approximately 250.  But for some reason, during the install, it created a 127 C drive and an unallocated 337 unallocated drive.

I don't think the above configuration is a good idea.  For one thing, I think it could adversely affect my Xp's performance to have such a small "C" drive....    I want as much space as possible on my C drive.  Is there a way to move the unallocated space to my C: drive?

If so, how do I do it! :)

Question by:Rowby Goren
    LVL 5

    Accepted Solution

    Hello, sure!

    You can allocate more drive space to your main partition, and it would be a good idea!!

    I suggest you to use Partition Magic or EASEUS Partition Master: The second one is free.

    With this software you can freely change the dimension of your partition without loosing data.

    Anyway with all those softwares, making these operation there is a risk to loose the data, but this risk is so little that it is possible to say that you doesn't loose anything.

    But a backup of important data is suggested.
    LVL 9

    Author Comment

    by:Rowby Goren
    Hi ping_it:

    As it turned out I had Partition Magic (from some other earlier issue I had).

    So I ran it and fixed the particiion in about 2 minutes!

    Thanks for your help!

    LVL 9

    Author Closing Comment

    by:Rowby Goren
    thanks again!
    LVL 70

    Expert Comment

    First, with regards to your comment "... I think it could adversely affect my Xp's performance to have such a small "C" drive.... "   ==>   Actually, you'll get BETTER performance with that configuration.    All modern drives use zoned sectoring, so the outermost cylinders have a notably better data transfer rate than inner cylinders.    With the C: drive restricted to the outermost 1/4th of the drive, all system activity (boots, program loads, etc.) will be in those faster cylinders.

    But as for what happened -- since you didn't intentionally create the 128GB partition, what almost certainly happened is you installed XP from an original (pre-service-pack) CD.    That version only supports 28-bit logical block addressing ... not the 48-bit LBA that's required to use disks larger than 128GB.    The result is it simply installed to the first 128GB of the disk.    After you did the Windows updates and added the service packs, XP then recognized the entire disk -- so you can now "see" the rest of it.    I'd simply create another partition on the rest of the disk to use for your additional data -- but if you really want to simply make C: use the entire disk, you can easily do so using any of several different partition management tools.    The one I prefer is Boot-It NG ... an exceptionally reliable utility to have in your "toolbox" (although a bit "geeky").

    The free demo version of Boot-It will do what you need here.    Just download it;  create a bootable CD (using the included MakeDisk utiility);  boot to the CD;  select CANCEL at the first prompt;  then OK.   Click on Partition Work.   Be sure you've selected the appropriate disk [HD0, HD1, etc. -- probably HD0 in this case ... but just note the partition display in the center -- it should show your current partition and the unallocated space];  highlight the partition you want to expand (the only one on the disk);  then click on ReSize, select the new size (max);  and let it finish (just a few seconds).     Done :-)

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