Dimensions (excluding bracket)  | 31.1 cm ⋅ 11.1 cm ⋅ 1.2 cm (12.3 in ⋅ 4.4 in ⋅ 0.5 in)  | 
  | 
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Type of drives supported  | 3 Gb/s SAS or 1.5 Gb/s SATA  | 
  | 
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Maximum power required  | Approximately 25 W  | 
  | 
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Temperature range  | Operating, 10° to 55°C (50° to 131°F)  | 
  | Storage,   | 
  | 
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Relative humidity  | Operating, 10% to 90%  | 
(noncondensing)  | Storage, 5% to 90%  | 
  | 
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RAID levels supported  | 0, 1, 1+0, and 5; also 6 if the batteries are used  | 
  | 
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Type of edge connector  | PCIe x8  | 
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PCIe transfer rate  | Up to 2 GB/s in each direction  | 
  | 
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Number of SAS ports  | Two internal, two external; each port has four 1x links  | 
  | 
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Maximum number of physical  | 108 (8 can be connected internally, and a further 100 can be  | 
drives (using all four ports)  | connected externally by using expanders)  | 
Maximum number of logical  | 32  | 
drives  | 
  | 
  | 
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Maximum size of a logical drive  | More than 2 TB  | 
  | 
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SAS transfer rate  | Up to 1.2 GB/s per port in each direction  | 
  | 
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Spare battery part number  | |
  | 
  | 
Time required to recharge  | From 15 minutes to 2 hours, depending on the initial battery charge  | 
battery  | level  | 
  | 
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Duration of battery backup  | More than 2 days if the batteries are fully charged and less than 3  | 
  | years old  | 
Battery life expectancy  | More than 3 years  | 
  | 
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Cache size  | 512 MB (48 MB is used by the onboard processor)  | 
  | 
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For more information about the controller features and specifications, and for information about system requirements, refer to the HP website (http://www.hp.com/products/smartarray).
Hardware features 6