Losing partitions after every reboot

Posted by Winston Smith on Super User See other posts from Super User or by Winston Smith
Published on 2010-11-27T11:33:44Z Indexed on 2011/11/26 10:01 UTC
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Filed under:

windows-7

|

partitioning

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disk-management

I have an Acer laptop with one hard disk, which up until yesterday had 4 partitions:

Recovery Partition (13GB)
C: (140GB)
D: (130GB)
OEM Partition (10GB)

I read that the OEM partition has all the stuff needed to restore the laptop to the factory settings, but since I'd already created restore disks and I needed the space, I wanted to get rid of it.

Yesterday, I used diskpart to do that. In diskpart, I selected the OEM partition and issued the delete partition override command which removed it. Then I extended the D: partition into the unused space using windows disk management.

Everything worked fine, until I rebooted my laptop, at which point the D: drive vanished. Looking in windows disk management again, I can see that there's an OEM partition of 140GB, which is obviously my D: drive.

So I used EASEUS Partition Master and assigned a drive letter to the 'OEM' partition and I was able to access my files again. However, every time I reboot, it reverts back.

How do I fix this permanently?

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