Sas Riser; Sas Riser Features; Functional Architecture; Intel Sas Raid-On-Motherboard (Romb) - Intel S7000FC4UR Technical Product Specification

SAS Riser

6. SAS Riser
The SAS riser works in conjunction with the SAS backplane to give the end-user support for
eight SAS hard drives in a 4U chassis. The SAS riser makes use of a dedicated PCI-Express*
slot located in the front of the chassis to make cabling to the backplane convenient. The
following block diagram, architectural overview, and placement diagram will provide a general
idea of how the SAS riser works.

SAS Riser Features

6.1.1
The SAS riser supports the following features:
LSI1078 ROC (Raid-On-a-Chip) controller
PCI-Express interface (x4), 2.5Gbps
8 channels of SAS/SATA at up to 3Gb/s
SAS Integrated RAID (levels 0, 1, 1E)
SAS HW RAID-on-Motherboard (ROMB) (levels 0, 1, 5, 6, 10, 50 and 60) through RAID
key upgrade option.
DDR2 Registered DIMM running at 667MHz for enhanced HW RAID performance
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Intel RAID Smart Battery for DDR2 DIMM refresh support during power failure
8 MB flash component (Intel
(STK14C88) store the code and hardware configuration information.
SES (System Enclosure Spec) connectivity through I2C* cable or SGPIO
UART and JTAG debug ports
6.2

Functional Architecture

6.2.1 Intel SAS RAID-on-MotherBoard (ROMB)
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The LSI1078* controller provides a SAS RAID-on-Motherboard (ROMB) solution which supports
RAID levels 0, 1, 5, 6, 10, 50, and 60. An 8-MB flash component (Intel
a 32-K non-volatile SRAM (STK14C88) store the code and hardware configuration information.
Default RAID solution is IR (Integrated RAID) which supports RAID levels 0, 1, and 1E. IR RAID
is activated through the LSI1078* F/W and does not utilize a DIMM or battery. To activate the
optional HW RAID ROMB solution upgrade, a physical Intel
667MHz RAID DIMM must be placed in the SAS riser's right angle DIMM connector. The Intel
RAID Activation Key contains a registration code which is required to unlock the HW RAID
engine in the LSI Mega RAID Controller. The MegaRAID solution supports RAID levels 0, 1, 5,
6, 10, 50, and 60. The DDR2 667MHz RAID DIMM serves as memory for the LSI1078* and as a
disk cache to store data for the drives. In addition to these components, an Intel
Battery (iBBU) may also be installed to refresh the RAID DIMM when the system power drops
below specifications.
After installing an Intel
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Intel RAID Smart Battery, and upgrading to the HW RAID firmware, the system BIOS setup
56
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TE28F640J3D-75) and a 32K non-volatile SRAM
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RAID Activation Key and DDR2 667MHz RAID DIMM, and optional
Intel order number E18291-001
Intel® Server System S7000FC4UR TPS
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TE28F640J3D-75) and
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RAID Activation Key and DDR2
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RAID Smart
Revision 1.0