This unit comes with 504 GB of storage. The 224F can be cascaded up to 7 units per PV 660F. ( Each PV660F can control 112 drives or 8 terabytes or drive capacity).
Supports RAID 0, 1, 3, 5, 0+1
Mirrored, battery-backed cache
Intelligent battery conditioning and monitoring, with auto-disable of the cache in the event of an alarm
Redundant backend Fibre Channel loops
Dual controller option
Multipath active/active failover
Redundant, hot-pluggable power supplies and cooling

On-line volume expansion can give you the ability to increase the size of a server's file systems and underlying volumes with no reboot required On-line capacity expansion allows additional physical storage to be added to the storage subsystem without having to shut down the storage subsystem or servers running Microsoft® Windows® 2000 Online RAID expansion lets you increase the size of a RAID group and associated LUNs while in production.

Fourteen (14) 1-inch disk drives per enclosure
Over 1022 GB per enclosure
Complete, fully redundant RAID subsystem (with drives and controllers) in 3U
Up to 14 complete RAID subsystems in one 42U rack
1 Gbps Fibre Channel host interface and drives
Up to 1 GB cache per subsystem
2 Gigabit ready" for easy upgrade when 2Gbps RAID technology arrives Dell OpenManage Array Manager provided free of charge with purchase of hardware

Supports S.M.A.R.T. alerts which enable prefailure notification from hard disk drives

Height 5.25 in (13.3 cm), Width 17.55 in (44.6 cm), Depth 18.0 in (46.2 cm).
Weight - 85 pounds with 14 hard drives installed.
Input voltage - 110 volts, 60 Hertz.
Raid Controller input - DB9.
Raid controller output - HSSDC.