Can't extend volume under Server 2008 SP2. Please help?

Disk 1 has 512 GB taken, but 512 GB unallocated. The extend volume wizard doesn't allow me to click Next with additional space.

Disk Management

Extend Volume Wizard

  • 1
    Does it work with a smaller number?
    – ewwhite
    Oct 8, 2014 at 5:30
  • Yes it does. 524287. I've never come across that before. Thanks for your help.
    – Ash
    Oct 8, 2014 at 5:49

2 Answers 2


I'd try making the volume just a tad smaller than the maximum disk size. Note the discrepancy between highlighted value and maximum size. See if that works to restore the grayed-out menu.


It says 524288 is free and you are trying to take more than the free space, ie 524289.

You have the right situation here,

  • your disk is basic,
  • it is not a system partition
  • it is healthy
  • it is NTFS

just this tidbit.

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