SQL database is crashed Closed

Question

Hello,
 Our server was hit by some unknown virus which seems to have corrupted header information for many of our files including an important databases and some of its backups.  However the log file (.LDF) for the live DB was not affected. We also have a relatively old .BAK backup file. 

Is it possible to bring the DB (.MDF) in the old backup to Live standard using the new/latest Log file? If so, how? Any help is truly appreciated.

RuneLassen · Answer

Follow the steps mentioned below:

 Take a tail log backup of your database after your full backup
 Restore your Full backup available with you using WITH NORECOVERY option.
 Restore Differential backups ( if you have in order) WITH NORECOVERY option
 Restore Transactional log backup in order WITH NORECOVERY and the last tail backup taken using WITH RECOVERY option..

RuneLassen · Answer

Ok, If your database is not functional now, then you can't take tail log backup.
In that case, try the steps given below:

 Detach your database
 Copy your LDF File to a new location
 Attach MDF File without providing LDF file..

Test whether this works or not.

SQL database is crashed

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