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SQL database is crashed

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morrisonn
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 - Apr 10, 2016 at 08:54 AM
RuneLassen
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 - Apr 17, 2016 at 12:33 PM
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.

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RuneLassen
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Apr 17, 2016 at 10:25 AM
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..
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morrisonn
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Apr 17, 2016 at 11:33 AM
But how do I "Take a tail log backup of your database after your full backup", since I don't have access to the original DB anymore.
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RuneLassen
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Apr 17, 2016 at 12:33 PM
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.
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