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sql-serverdatabaserecovery

How do I attach a MSSQL 2000 database with only an MDF file

I have an old server with a defunct evaluation version of SQL 2000 on it (from 2006), and two databases which were sitting on it.

For some unknown reason, the LDF log files are missing. Presumed deleted.

I have the mdf files (and in one case an ndf file too) for the databases which used to exist on that server, and I am trying to get them up and running on another SQL 2000 box I have sitting around.

sp_attach_db complains that the logfile is missing, and will not attach the database. Attempts to fool it by using a logfile from a database with the same name failed miserably. sp_attach_single_file_db will not work either. The mdf files have obviously not been cleanly detached.

How do I get the databases attached and readable?

Solution

  • I found this answer, which worked with my SQL 2000 machines:

    How to attach a database with a non-cleanly detached MDF file.

    Step 1: Make a new database with same name, and which uses the same files as the old one on the new server.

    Step 2: Stop SQL server, and move your mdf files (and any ndf files you have) over the top of the new ones you just created. Delete any log files.

    Step 3: Start SQL and run this to put the DB in emergency mode.

    sp_configure 'allow updates', 1
go
reconfigure with override
GO
update sysdatabases set status = 32768 where name = 'TestDB'
go
sp_configure 'allow updates', 0
go
reconfigure with override
GO

    Step 4: Restart SQL server and observe that the DB is successfully in emergency mode.

    Step 5: Run this undocumented dbcc option to rebuild the log file (in the correct place)

    DBCC REBUILD_LOG(TestDB,'D:\SQL_Log\TestDB_Log.LDF')

    Step 6: You might need to reset the status. Even if you don't, it won't do any harm to do so.

    exec sp_resetstatus TestDB

    Step 7: Stop and start SQL to see your newly restored database.