Initialization of medium failed is shown when the Filelibrary is full or almost full (one or more mountpoints / folders in filelibrary). If you did not install the GR Patches from July 2010, you may also see a lot of media with blue question mark withhin the mountpoint from your filelibrary. In addition it has been seen that the file cart.txt is quite large when you would do an export of MMDB (
omnidbutil -writedb -mmdb Verzeichnis).
As a first starting mount you may want to increase diskspace for the mountpoint or you can migrate media from the filelibrary to another media off the filelibrary to get free diskspace. As a second step you may want to try to format the media with the blue question mark.
If you still encounter problems try following procedure:
omnidownload -library Libraryname -file Filename
omniupload -modify_library Library -file Filename
In any case you should install the lateste patches (current: GR Patches from July 2010) as the error is already resolved with these patches.
If you still encounter problems I recommend to completly empty the file library (migrate all media from involved file library to another media off the filelibrary) and to remove not needed (or wrong) entries from cart.txt. What has to be deleted in cart.txt is not explained here, as this way is not supported. For some bucks I take over this work in a remote session.