HP Smart Array Advanced Pack Software manual Controller specifications by model

Relative humidity (noncondensing)	Operating, 10% to 90%
	Storage, 5% to 90%
Time required to recharge battery1	From 15 minutes to 2 hours 40 minutes, depending on the initial battery
	charge level
Duration of battery backup1	If the battery is fully charged and less than 3 years old, more than 2 days
	The battery pack provides a continuous charge to store the cached data
	in DDR memory.
Battery life expectancy1	3 years
	For more information, see "Battery pack service life (on page 36)."
Time required to recharge	5 minutes or less
capacitor2
Duration of capacitor backup2	80 seconds
	The capacitor pack provides a sufficient duration to transfer the cached
	data from DDR memory to flash memory, where the data remains
	indefinitely or until a controller retrieves the data.
Capacitor life expectancy2	More than 3 years
Mini-SAS connector life	250 connect/disconnect cycles (for external, internal, and cable
expectancy	Mini-SAS connectors)
Supported drive types3	•	3.0-Gb/s SAS drives
	•	6.0-Gb/s SAS drives
	•	1.5-Gb/s SATA drives
	• 3.0-Gb/s SATA drives (on systems that support 6.0-Gb/s SAS drives)
	•	6.0-Gb/s SATA drives
	Not all servers or storage systems support all SAS or SATA drive types.
	For product-specific drive support, see the product QuickSpecs on the HP
	website (http://www.hp.com/go/bizsupport).
	OBDR tape drives are also supported. For more information about OBDR,
	see the HP website (http://www.hp.com/go/obdr).
Maximum number of logical drives	64

1For controllers that use battery-backed write cache 2For controllers that use flash-backed write cache

3Not all servers support all drive types. For more information, see the server QuickSpecs on the HP website (http://www.hp.com/go/bizsupport).

Controller specifications by model

E500, P411, and P421 specifications

Specification	E500	P411	P421
Board type	Low-profile, PCIe stand-up	Low-profile, PCIe stand-up	Low-profile, PCIe stand-up
	board	board	board
Dimensions, cm*	16.8 x 7.0 x 1.8	16.8 x 7.0 x 1.8	16.8 x 6.9 x 1.7
Dimensions, in*	6.6 x 2.8 x 0.7	6.6 x 2.8 x 0.7	6.6 x 2.7 x 0.6
Maximum number of	100 external	100 external	200 external
physical drives		(controller does not operate	(controller does not operate
		without cache)	without cache)
Maximum power required	14 W	12 W	14 W
(approximate)

Specifications 33