Adding, removing, or changing a drive letter or path for an existing LUN

You can add, remove, or change a drive letter or mount point path for an existing LUN using the SnapDrive for Windows MMC snap-in.

Steps

1. Under SnapDrive in the left MMC pane, select the instance of SnapDrive you want to manage. Then, double-click Disks and select the disk you want to manage.
2. From the menu choices at the top of MMC, navigate to Action > Change Drive Letter and Paths.
3. In the Change Drive Letter and Paths window, click either Add, Remove, or Change, depending on the action you want to take.
   Note: The Change option is unavailable for mount points.

   If...	Then...
   You are removing a drive letter or path	Click OK to proceed with the operation.
   You are adding or changing a drive letter or path	In the Add or Change Drive Letter or Path window, select a drive letter or enter path in the space provided, then click OK.

   By removing the last volume mount point on a shared disk, SnapDrive for Windows removes the resource dependency from the root disk. If you are creating a mount point from one shared disk to another, SnapDrive verifies they are in the same cluster group and creates a dependency to the root disk resource if it is the first volume mount point to that root disk.

   Note: When you create the first volume mount point to a root disk that is shared and is being used by MSCS, SnapDrive takes offline the physical disk resource, presenting the mounting volume, as part of the resource dependency process. As a result, any other cluster resources that depend on the physical disk resource will also be taken offline. An example of this is the Exchange System Attendant cluster resource. SnapDrive automatically brings the physical disk resource back online but will not bring the Exchange resources back online. Exchange resources should be brought back online manually by the administrator using the Cluster Administrator.