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How To Access an EFI Partition in Windows XP 64-Bit Edition

This article was previously published under Q294773
SUMMARY
This article describes how to access an Extensible Firmware Interface (EFI) partition on IA64-based computer.

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Access an EFI Partition

  1. At a command prompt, type mountvol drive letter: /s, and then press ENTER. For example, type:
    mountvol z: /s
  2. Type mountvol, and then press ENTER.

    You should now be able to see and access the mounted EFI partition.
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Available Mountvol Switches

The following switches are available to create, delete, or list a volume mount point
mountvol [drive:]path VolumeName
mountvol [drive:]path /D
mountvol [drive:]path /L
mountvol drive: /S
where:
  • Path specifies the existing the NTFS file system directory in which the mount point will reside.
  • VolumeName specifies the volume name that is the target of the mount point.
  • /D removes the volume mount point from the specified directory.
  • /L lists the mounted volume name for the specified directory.
  • /S mounts the EFI System Partition on the given drive.
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Possible Values for VolumeName and Current Mount Points

\\?\Volume{f7c6e0c0-b6d1-01c0-d931-f8428177d974}\
C:\

\\?\Volume{d53a4d81-22c4-11d5-bd86-806d6172696f}\
A:\

\\?\Volume{d53a4d80-22c4-11d5-bd86-806d6172696f}\
D:\
The EFI System Partition is mounted in the following location:
Z:\
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Properties

Article ID: 294773 - Last Review: 01/15/2006 22:52:39 - Revision: 2.4

  • Microsoft Windows XP 64-Bit Edition
  • Microsoft Windows Advanced Server, Limited Edition
  • kbhowtomaster KB294773
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