Xsan volume may not mount after using Xsan 1.3 uninstaller

If you use the Xsan 1.3 uninstaller and then reinstall an older version, such as Xsan 1.1 or 1.2, on the same computer, the Xsan volumes may not mount on startup. Xsan Admin will show that the volume is mounted, but it will not appear in the Finder. Relaunching the Finder via the Force Quit dialog may allow the volume to mount until the computer is restarted.

To resolve the issue, follow these steps:

1. Use the Xsan uninstaller to remove Xsan from the system.
2. Delete this file from the startup disk:
   

   /System/Library/Extensions/AppleXsanFilter.kext

   
   
3. Install Xsan 1.1, then update to the desired version.