Intel SR1500 - AXXMINIDIMM DDR-2 RAID Controller Cache Memory Manual page 57

Peripheral and Hard Drive Sub-System
6.3.2.2 x4 PCIe* Card Edge Interfaces
Two x4 PCIe* card edges are used to connect the active mid-plane to the hot-swap backplane.
See Table 22. Mid-Plane to Backplane Card Edge Connector #1 Pin-Out and Table 23. Mid-
Plane to Backplane Card Edge Connector #2 Pin-Out for details. The use of card edge
connectors to the back plane eliminates all hard drive cabling.
6.3.2.3 IOP80333 IO processor
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The Intel 80333 IO processor is a multi-function device that integrates the Intel Xscale
with intelligent peripherals and two PCIe* to PCI-X* bridges. It will be connected to the server
board 's x4 PCIe lane and serve as bridge for PCI-X 133MHz secondary bus. The IOP80333
also includes fully functional RAID support.
6.3.2.4 LSI* LSISAS1068 SAS Controller
The LSI* LSISAS1068 controller resides on the Channel A PCI-X bus of the IOP80333
supporting transfer rates of up to 3GB/s. It includes an Address Translation Unit (ATU)
supporting transactions between PCI address space and 80333 address space. Address
translation for the ATU is controlled through programmable registers accessible from both the
PCI interface and the Intel Xscale
ROM and NVSRAM to support SAS only software RAID. Software RAID Levels supported
include 0, 1, and 10.
6.3.2.5 Optional Hardware RAID Support
The active mid-plane supports options to provide full hardware RAID support. Options required
to enable hardware RAID support include an Intel
AXXRAK18E) and installation of a Mini-DIMM for Intel RAID Cache support. To protect from
data loss during an unexpected power loss event, an Intel
(AXXRSBBU3) is also supported. Hardware RAID levels supported include 0, 1, 5, 10, and 50.
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6.3.2.5.1 Intel
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The Intel RAID Activation Key enables the full intelligent SAS Hardware RAID solution
engineered around the Intel
in to a connector (J1A10) on the mid-plane board. With no RAID activation key installed, only
SAS Software RAID levels 0, 1, and 10 are supported.
6.3.2.5.2 Intel RAID Cache support
To further enable support for hardware RAID, the active mid-plane provides a 244-pin mini-
DIMM connector (J8C1), supporting a single registered ECC non-parity DDR2-400 MHz Mini-
DIMM to provide Intel RAID cache. Mini-DIMM capacities supported range from 128MB to 1GB.
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Note: See the Intel
mini-DIMMs.
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6.3.2.5.3 Intel
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With an Intel RAID Smart Battery Backup module installed, data loss is prevented when data is
still present in the RAID Cache Module and power is unexpectedly lost. Depending on the cache
module capacity used, the battery backup unit can provide 48 to 72 hours of battery backup
power to allow data stored in the RAID cache to be processed. A 2x10 connector (J9A2) is used
to attach the battery backup unit to the mid-plane.
44
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core. The LSISAS1068 controller includes its own Flash
RAID Activation Key
®
80333 I/O Processor @ 500MHz. The activation key plugs directly
Server Board S5000PAL Tested Memory List for a list of Intel validated
RAID Smart Battery Backup Module
Intel order number D31982-006
Intel® Server System SR1550AL
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RAID Activation Key (product order code -
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RAID Smart Battery Backup module
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core
Revision – 1.3