IDR restoration of complete site from tape duplicate

I believe that IDR has a limitation where duplicate backups do not update the >DR files, hence you can only see the disk sets when you select a .DR file. Of course you could backup directly to tape to get updated DR files for the tapes.

IDR does have a manual recovery method where you can specify everything to restore from the backup sets on the media server. However the media server has to be up an running. Which you could achieve by backing up this server directly to tape which should then give you valid DR files for the tape sets. However that would give you another problem in that after you have recovered that server it would need the ability to allow login without an active DC which would basically mean you would need a group policy exception for the security setting against the media server itself (before your DR backup is made.)