Technical Product Specification

Intel® Server System SR2625UR TPS Peripheral and Hard Drive Subsystem
Revision 1.8 Intel order number E46130-010
63
6.4.2.1 Architectural Overview
Figure 35. Architecture Overview
6.4.2.2 x4 PCI Express* Card Edge Interfaces
Two x4 PCI Express* card edges are used to connect the active midplane to the hot-swap
backplane. The use of card edge connectors to the backplane eliminates all hard drive cabling.
6.4.2.3 LSI LSISAS1078 ROC
The LSI LSISAS1078 ROC supports transfer rates of up to 3 GB/s on each SAS port. It
integrates a high-speed DDR/DDR2 SDRAM interface for Hardware RAID cache. It utilizes a
PCI Express* interface to provide transmission and reception rates of up to 10 GB/s over a x4
link from ICH10R through the bridge board.
6.4.2.4 Optional Hardware RAID Support
The active midplane supports options to provide full hardware RAID support. Options required
to enable hardware RAID support include an Intel
®
RAID Activation Key (Product Order Code –
AXXRAKSAS2) and installation of a Mini-DIMM for Intel
®
RAID Cache support. To protect from
data loss during an unexpected power loss event, an Intel
®
RAID Smart Battery Backup module
(AXXRSBBU3) is also supported. Hardware RAID levels supported include 0, 1, 5, 6, 10, 50,
and 60.