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3ware® User Guide > Configuring Units > Removing a Unit

Removing a Unit
Removing a unit through software (also known as 'array roaming') keeps the data intact on the unit. It allows you to move the unit to another controller or to store the drives for safekeeping purposes.
Removing a unit is different than deleting a unit. Deleting a unit will destroy the data on the unit.
 
Warning: It is important to remove the unit through software, before removing it physically. Failure to do so could result in a system crash or hang and may even corrupt the data and the unit configuration from being reassembled later.
 
Note: You can also remove a drive, if you want to force a degrade on a redundant unit, or if you want to remove a drive from the “Available Drives” list so that you can then remove it from the system. For more information, see Removing a Drive.

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