I can't display the contents of a Windows iSCSI LUN after re-booting my Windows server.

Answer:

If you were able to display the contents of the LUN before the re-boot, but you can't display it after the re-boot, this may mean that the shares were lost when you re-booted. (Folderscape needs a share at the root of the disk in order to display its contents.)

This is a known problem with iSCSI on Windows, and is easily corrected. See Microsoft Knowledge Base article 870964 for details.