Scalability - HP StorageWorks XP12000 Owner's Manual

Scalability

Overview
The disk array is scalable to accommodate your current and future storage
capacity needs.
The minimum XP12000 configuration includes one DKC containing 9 to
128 disk drives. You can expand the disk array to include one to four
DKUs, each containing up to 256 disk drives. The maximum array
configuration can contain 1152 disk drives providing up to 165 TB of
storage capacity in a single array.
Your HP support representative can add DKUs and disk drives online with
no interruptions to applications or hosts.
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