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I have a WD My Passport 0748 USB3.0 HD. It's partitioned into two NTFS partitions 31.4GB, 900GB. I want to merge these partitions without a chance of data loss, I need it VERY SAFELY. When i tried my traditional solution "Windows Disk Management" under Windows 8, it gave me this message:

The operation you selected will convert the selected basic disk(s) to dynamic disk(s). If you convert the disk(s) to dynamic, you will not be able to start installed operating systems from any volume on the disk(s) (except the current boot volume).

Actually, I don't know what it means, but i need to merge it VERY SAFELY.

Cœur
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Yasser Rabee
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  • You would have to take a full backup of one partition. – user568109 Sep 10 '13 at 15:57
  • @user568109 one partion is enough? Is this really safe? - The 30GB is already empty but I can't help with the 900GB! – Yasser Rabee Sep 10 '13 at 16:10
  • I meant just one partition. Merging requires you to unallocate one drive then extend the other drive with space freed. You are good to go. – user568109 Sep 10 '13 at 16:32
  • @user568109 Thanks! but when i tried to, I got a message says: "The operation is not supported by the object." - what shall I do? – Yasser Rabee Sep 10 '13 at 18:10
  • How are you trying to merge them. You have to open disk management and then delete/extend partition. – user568109 Sep 10 '13 at 18:29
  • @user568109 I did as you said "open disk management and then delete/extend partition" - but stillhave this "The operation is not supported by the object" error! – Yasser Rabee Sep 11 '13 at 08:47
  • Can you post screenshot of your disk management screen. Is there any other patition there ? Are both your partitions adjacent ? – user568109 Sep 11 '13 at 11:19
  • @user568109 sorry I have some internet connection troubles! http://i41.tinypic.com/2ufu3hl.jpg – Yasser Rabee Sep 19 '13 at 13:06

1 Answers1

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Windows Disk Management cannot extend a disk if it has a lower offset than the selected partition, i.e. it is on the left of selected disk. So what to do, use the disk managers discussed here:

  1. How can I extend a volume where the unallocated space is located to the LEFT of the Primary Partition in Disk Management
  2. Windows - Adding Unallocated Drive Space "From the left"

Basically first the partition will be moved left then extended. See the steps in the second link.

user568109
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