Dell EqualLogic PS6100 series Configuration Manual page 38

To convert from a no-spares RAID policy to a policy that uses spare drives, you must use the CLI. Refer
to the Dell EqualLogic Group Manager CLI Reference Guide. You can also use the CLI to convert to a
RAID policy that does not use spare drives, but Dell recommends against doing this.
March 2013 Dell EqualLogic Configuration Guide v14.1 3-29