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3ware® User Guide > Configuring Units > Moving a Unit from One Controller to Another

Moving a Unit from One Controller to Another
After you have configured a unit on a 3ware 9000 series controller, you can move it to a different 3ware 9000 series controller, and retain the configuration on the new controller. This is referred to as “array roaming.”
When connecting the unit to the new controller, you do not have to physically connect the drives to the same physical slots to which they were connected on the previous controller. The firmware will still recognize the unit. This feature is referred to as “disk roaming.”
3DM includes two features that help you move a unit without powering down the system, allowing you to hot swap the unit. The Remove Unit feature lets you prepare a unit to be disconnected from the controller, and the Rescan feature checks the controller for drives that are now connected, and updates the 3DM screens with current information. For details, see Removing a Unit and Rescanning the Controller.
 
Note: Moving a unit to another controller while the unit is in the migration state is supported with one restriction. If the unit was in the middle of the migration process and the controller was shutdown uncleanly, the unit cannot be moved to another controller until the unit has recovered from the unclean shutdown. This may require initializing, verifying, or rebuilding the unit.
 
Note: If you wish to move an array with Rapid RAID Recovery enabled to a controller with pre-9.5.1 firmware, you will need to disable Rapid RAID Recovery, otherwise the older firmware will not recognize the unit.
 
Caution: If you have a configured RAID unit on an older controller, such as an 8506, and you move the drives to a new controller, such as a 9690SA, you must first convert the units from 7xxx/8xxx format to 9xxx format using a 3ware utility available from 3ware Technical Support.
You cannot move drives back from a 9690SA controller to an older controller and maintain the data. If you want to swap drives back and forth between controller cards, be sure to have a backup of your data.

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