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Solved: Windows 7 installation unable to create partition


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xfilesguy xfilesguy is offline
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13-Apr-2010, 01:43 PM #1
Solved: Windows 7 installation unable to create partition
Hi there,

I am trying to update the OS running on my assembled desktop from Windows XP to Windows 7 x64. Unfortunately my DVD drive has gone kaput, so I am using a USB image to install. The HDD that I am trying to install Windows 7 on is an IDE. Before starting the installation, I disconnected the second HDD (SATA) because it seems to be a potential cause of a problem during installation.

I have already deleted the original XP partition along with a couple of others and created a new, merged partition for the OS for the unallocated space (around 35 GB). However, the installation does not proceed and I get an error message saying "Setup unable to create a new system partition or locate an existing....".

I have been searching for a solution to this all day and I believe the problem might be occurring because all the partitions existing on this IDE drive are logical (except a freak partition of 8 MB that I was forced to create while installing XP a couple of years back!). Perhaps I need to use a utility like DISKPART to manually create a primary partition.

The major issue is that since I already deleted the XP partition, there is no simple way that I can find to do this. I cannot use Partition Magic or any other software that has to be run from inside windows before restarting. I tried to circumvent this by booting via another USB drive on which a package called WliveUSB was installed, which allows me to run something called Bart PE. Somehow I cannot run DISKPART from this environment either and since most of the interface is in German I am having problems figuring out what the issue is this time.

Looking for any suggestions, solutions or any easier ways to run DISKPART / an alternate software to help me create a primary partition manually...please help!
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13-Apr-2010, 04:46 PM #2
GParted is pretty good. I've used it on a bootable CD, and there is a USB version. I think you want to mark the partition (on which Windows 7 will be installed) as Active (or "boot" or "system"; I forget which term GParted uses).
xfilesguy's Avatar
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13-Apr-2010, 04:52 PM #3
Thanks a lot for replying.

Ya I found out about GParted, am currently downloading the Live version which is supposed to run off a USB key. Will take some time to download, will update if it works for me.

*fingers crossed*
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14-Apr-2010, 11:11 AM #4
Phew...problem solved!

Used GParted to create a new primary partition and finally the Win 7 installer was able to use it. Seems like an obvious solution but the complication (as I understand it now) was that the unallocated space (created by deleting 2 logical partitions) created earlier lied within the extended partition and hence any new partition I tried to create from that space was forced to be a logical partition. Had to shrink the extended partition first by the amount of unallocated space and then I was able to create the new partition as a primary one.

GParted is really cool, an excellent interface and ran perfectly from the USB drive.
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