If you are trying to proactive copy to hot spare for the disks in FAST cache, you must use the CLI command "copytohotspare -initiate" - it's in the CLI manual. is in the form B_E_D  glen
With regular disks this is possible though highlighting a drive and click on "copy to hot spare", but this is greyed out on EFD drives. Does anyone know hoe to copy an EFD to a Hot Spare ?
How do I proactively copy an EFD to an EFD Hot Spare ?