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ITsVISTA KB-Link: KB950927

The size of the GUID partition table (GPT) disk is not updated on a Windows Vista-based computer after you use a disk management program to expand a logical unit number (LUN)

Consider the following scenario:

  • You are running a Windows Vista-based computer.
  • To provide additional space on the computer’s hard disk, you run a disk management program to expand the size of a logical unit number (LUN).

In this scenario, the LUN size is not updated after you run the disk management program. This issue occurs if you use a computer that includes GUID partition table (GPT) disks.

Note: A master boot record (MBR) disk does not experience this issue.

There is a download that resolves this issue. See Hotfixes for details.

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB950927.

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