Reverting from Dynamic Server 10.0 to Versions 9.40, 9.30, 9.2x, 7.3x, or 7.24

Before you revert from Dynamic Server 10.0:

Remove all objects from the databases that the old database server does not support, except those that the boot scripts created in the system catalog. Do not remove the objects that the boot90.sql and boot901.sql scripts created because the reversion utility uses them.
Read the release notes and the machine notes for any late-breaking information.

If you are reverting to Dynamic Server 7.3, you must drop any index whose key size is greater than 254. Dynamic Server 10.0 supports a maximum index key size of 255 for VARCHAR and NVARCHAR types. However, Dynamic Server 7.3 only supports a maximum index key size of 254.

To revert from Dynamic Server 10.0, complete the following steps. The subsections that appear below these summary steps provide more information about each step.

To revert from Dynamic Server 10.0

Review the database schema to determine whether reversion is possible.
Check and configure available space.
Save copies of the current configuration files.
Verify the integrity of the data.
Back up Dynamic Server Version 10.0.
Remove new features and any pending in-place alters which were performed in using Dynamic Server Version 10.0.
Remove BladeManager extensions.
If necessary, disable HDR.
If necessary, perform Enterprise Replication reversion tasks (see Reverting from Dynamic Server 10.0 with Enterprise Replication).
Run the reversion utility (onmode -b).
Modify configuration parameters.
Reset environment variables.
If necessary, remove any Communications Support Module settings.
Reinstall and start the target database server.
Update statistics.
Verify the integrity of the data.
Back up the target database server.
Return the target database server to online mode.