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Copying Databases from Earlier Versions of SQL Server
In Microsoft® SQL Server™ 2000, you can restore a database backup created using SQL Server version 7.0. You can also use the Copy Database Wizard to copy databases from SQL Server 7.0. For more information, see Using the Copy Database Wizard.

However, backups of the master, model and msdb created using SQL Server 7.0 cannot be restored by SQL Server 2000. Also, it is not possible to restore a database backup created using SQL Server version 6.5 or earlier. Database backups created using SQL Server 6.5 or earlier are in a format incompatible with SQL Server 2000.

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