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