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

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Article ID: 294773 - View products that this article applies to.
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This article describes how to access an Extensible Firmware Interface (EFI) partition on IA64-based computer.

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.

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
  • 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.

Possible Values for VolumeName and Current Mount Points



The EFI System Partition is mounted in the following location:


Article ID: 294773 - Last Review: January 15, 2006 - Revision: 2.4
  • Microsoft Windows XP 64-Bit Edition
  • Microsoft Windows Advanced Server, Limited Edition
kbhowtomaster KB294773

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