In SQL Query Analyzer, back up a database by running the following command:
BACKUP DATABASE DatabaseName TO TAPE = TapeDriveName WITH FORMAT, BLOCKSIZE=65536, NOUNLOAD
Notes• This command formats the tape with a block size of 64 KB. Therefore, the tape can be used by SQL Server 2000 and Windows Server 2003.
try to backup using above cmd and try restoring ..
its working all db's . but i am trying to restore .mdf file. i am working with dnn4.while creating dnn web application i installed db in Database.mdf file.
now i am trying copy this in to server db.but is not working.