Under AppleShare 3.0.x
Most likely, the desktop files on the file server need to be rebuilt. The most effective way of rebuilding the server desktop is to restart the server with the shift key depressed until the "Extensions Disabled" message appears in the Welcome to Macintosh window. Then depress the COMMAND and OPTION simultaneously until the "Are you sure you want to rebuild the desktop..." message appears. (This message will appear for each volume.) Click OK to start the rebuild. This process will ensure a complete desktop rebuild.
Under AppleShare 2.0.x
Most likely, the problem is not with the Desktop file for the hard drive but with the Server Desktop files (Desktop DB and Desktop DF), which are invisible and located in the Server Folder.
Rebuilding the desktop files of an AppleShare Server volume is a little tricky. You need to restart the AppleShare Server from a floppy (or a non AppleShare Server volume). If you restart the AppleShare Server from a floppy and rebuild the desktop as described above, you are only rebuilding the standard desktop file on that volume, not the AppleShare Server "desktop files" (Desktop DB and Desktop DF). If, however, you restart the server with the Server Administration disk or any other floppy disk with the Desktop Manager in its System Folder, the Desktop Manager becomes active, and the AppleShare "desktop file" can be rebuilt.
The standard desktop file is different from the AppleShare "desktop file". The AppleShare "desktop file" consists of two files, Desktop DB and Desktop DF, that serve the same purpose for multiple users under AppleShare as the standard desktop file does for a single-user Macintosh. The Desktop DB and Desktop DF files are used only if the Desktop Manager is active, as in the case of an AppleShare server. Then the standard desktop file is not used.