When we restarted the SQL server, under the tree of Databases, we found that one of our databases, say DB_1, is not lighted with "yellow" color. It is gray. Beside its name, there is the text "(suspect)". When we tried to open this database, it is empty. When we tried to add 1 new user, there is a warning saying that there is one or more databases that are inaccessible.
This database, DB_1, is pretty big: ~17 GB of data. We tried to recover it but could not.
If you know what caused this problem and/or how to recover the database, please help. Any help would be appreciated.
Thanks a lot.