In our development environment we have long been using a particular backup and restore script for each of our products through various SQL Server versions and different environm
I had the same problem, but just with restore. I got this error in Management studio: "Specified cast is not valid. (SqlManagerUI)" ...and this error in query: "SQL Server cannot process this media family."
Then I done a simple thing: I coped backup set into the default backup folder. For example: C:\Program Files\Microsoft SQL Server\MSSQL10_50.SQLEXPRESS2008R2\MSSQL\Backup\bckup.bak It worked. I restored it from this place. :-S It looks like the SQL is sector-size sensitive.