Dell iDRAC6 User Manual page 119

3 Click Next to start the firmware rollback process.
On the Rollback (Step 3 of 3) page, you see the status of the
rollback operation. On successful completion, it shows that the process
completed successfully.
If the firmware rollback is successful, iDRAC6 will reset automatically. To
continue working with iDRAC6 through the web interface, close the
current browser and reconnect to iDRAC6 using a new browser window.
An appropriate error message is displayed if an error occurs.
NOTE:
The Preserve Configuration feature does not work if you want to
rollback iDRAC6 firmware from version 2.1 to version 2.0.
Configuring iDRAC6 Enterprise Using the Web Interface
119