Use this action to assign one or more hot-spare drives to a logical device. An assigned hot-spare drive is a dedicated spare: it used only to rebuild the logical device to which it is assigned. An unassigned hot-spare drive is "global": it can be used to rebuild any logical device on the controller.
Note:
You cannot assign a hot-spare drive while a logical device is being built or
modified (such as a logical device migration).
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