HP Smart Array Controllers on HP ProLiant Servers User Guide

Specifications 36
Specification P800 P812 P822
Dimensions, cm*
31.1 x 11.1 x 1.2 31.1 x 11.1 x 1.2 16.8 x 11.1 x 1.8
Dimensions, in*
12.3 x 4.4 x 0.5 12.3 x 4.4 x 0.5 6.6 x 4.4 x 0.7
Maximum number of
physical drives
108 (internal + external) 108 (internal + external) 227
†
(internal + external)
Maximum power
required (approximate)
25 W 29 W** 31 W**
RAID levels
RAID 0, 1, 1+0, and 5 RAID 0, 1, 1+0, 5, and 50 RAID 0, 1, 1 (ADM), 1+0,
10 (ADM) 5, 50, 6 and 60
Battery kit option part
number
398648-001 — —
Cache module
72-bit wide, 512-MiB
BBWC
72-bit wide, 1-GiB FBWC 72-bit wide, 2-GiB FBWC
I/O connection to the
system board
PCIe x8 edge connector PCIe 2.0 x8 edge
connector
PCIe 3.0 x8 edge connector
*These dimensions exclude the board bracket.
**This controller is for use on qualified systems that support power requirements above 25 W.
†
To install SLES 11 SP2, you must reduce the number of attached hard drives to less than 200 prior to installing the
operating system. After installing SLES11 SP2, download and install the latest Smart Array hpsa driver from the HP
website (http://www.hp.com/go/support) or by using SPP, and then shut down the server. You can now reattach up to
277 hard drives and boot your server to run the SLES 11 SP2 operating system.
Battery pack service life
The batteries in BBWC battery packs are a consumable material. After 3 years of service, batteries may not
provide predictable data retention times. If a battery fails completely, the HP Smart Array controller detects
this condition and automatically restricts write cache functions to protect user data. To help ensure
uninterrupted performance levels, HP recommends replacing battery packs at 3-year intervals.
In NiMH batteries, the charging and discharging processes create and recombine inert gases, which can
cause the button cell to swell in size by as much as 20%. Battery packs are designed to stop charging before
excess swelling occurs.
However, if excess swelling does occur, a pressure mechanism within the button cell releases these non-toxic,
non-corrosive gases before the cell incurs physical damage. If this pressure release occurs, the battery no
longer charges properly, and the storage solution reports a failed battery.