Specs :
Characteristics
Model : 1814-70A/H/S/T, 1814-72A/H/S/T
1814-70S/T, 1814-72S/T (DC power supplies)
RAID controller : Dual active
Cache : Model 70A/70S: 2 GB
Model 72A/72S: 4 GB

Battery-backed
Host interface : 8 host ports model 72, 4 host ports model 70Fibre Channel (FC) Switched and FC Arbitrated Loop (FC-AL) standard, Auto-sensing 1 Gbps/2 Gbps/4 Gbps
Drive interface : 4 drive portsFibre Channel (FC) Switched and FC Arbitrated Loop (FC-AL) standard, Auto-sensing 1Gbps/2 Gbps/4 Gbps
Supported drives : Supports 2 Gbps FC:10K 73.4 GB, 146.8 GB, 300 GB E-DDM, 15K 36.4 GB, 73.4 GB, 146.8 GB E-DDM
Supports 4 Gbps FC: 15k 300 GB, 146.8 GB, 73.4 GB, 36.4 GB E-DDM
Supports 4 Gbps SATA: 7.2K 500 GB/750 GB and 1 TB E-DDM Disk drives
RAID levels : 0, 1, 3, 5, 6, 10
Storage partitions : 4, 8, 16, 64 or 128 storage partitions
Maximum drives supported : Model 72A/H/S/T: 112 FC or 112 SATA drives (using 6 DS4000 EXP810 Expansion Units)
Model 70A//H/S/T: 112 FC or 112 SATA drives (using 6 DS4000 EXP810 Expansion Units)
Fans and power supplies : Dual redundant, hot-swappable
Rack support : 19-inch, industry-standard rack
Management software : IBM System Storage DS4000 Storage Manager version 10.10
SAN support : Supported IBM FC switches and directors (product numbers 2005, 2006, 2109, 2026, 2027, 2031, 2032, 2034, 2042, 2054, 2061 and 2062, and IBM BladeCenter)
Warranty : Three year parts and labor warranty, 9x5 next business day, upgradeable to 24x7 with four hour response

Physical characteristics
Dimensions : H - 130.3 mm (5.13 in) W - 447.0 mm (17.6 in) D - 563.8 mm (22.2 in)