Intel SR1500 SR1550 Chassis TPS - Page 55

Mid-Plane Options

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Peripheral and Hard Drive Sub-System Intel® Server System SR1550AL 6.3 Mid-Plane Options New to this generation of high density server system is the concept of the mid-plane. The midplane is the interconnect between the server board and both the hot-swap backplane and control panel. It is also used to determine which hard drive technology is to be supported. Two different Mid-plane options are available for this platform 1) a cabled passive mid-plane capable of supporting SATA ports from the server board or SAS/SATA ports from an add-in card; 2) an active SAS / SAS RAID mid-plane. This section will describe the hard drive interface support of each of the mid-plane boards. 6.3.1 Passive Mid-Plane The passive mid-plane option is used when the system configuration requires the use of an add-in SATA or SAS controller or the on-board SATA ports from the server board are used. The drive control signals are cabled to the passive mid-plane. The mid-plane plugs directly into the hot swap backplane using two edge connectors, routing the hard drive signals to the appropriate hard drive connectors on the 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. Figure 28. Passive Mid-Plane Board 6.3.2 Active Mid-plane with Intel® SAS /SAS RAID Support The active mid-plane is used to provide SAS / SAS RAID support. It has integrated on to it an Intel IOP80333 IO processor and an LSI* LSLSAS1068 3Gb/s SAS controller. Together they provide support for up to eight SAS drives in this system. By default, this mid-plane option provides software RAID levels 0, 1, and 10 utilizing Intel® Embedded RAID Technology II. With the installation of optional RAID enablement devices, the mid-plane can support hardware RAID levels 0, 1, 5, 10, and 50. The mid-plane attaches to the hot-swap backplane by two card edge connectors which eliminates the need for any hard drive cables. The following sub-sections describe the board level SAS / SAS RAID functionality. 42 Revision - 1.3 Intel order number D31982-006

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Peripheral and Hard Drive Sub-System
Intel® Server System SR1550AL
Revision – 1.3
Intel order number D31982-006
42
6.3
Mid-Plane Options
New to this generation of high density server system is the concept of the mid-plane. The mid-
plane is the interconnect between the server board and both the hot-swap backplane and
control panel. It is also used to determine which hard drive technology is to be supported.
Two
different Mid-plane options are available for this platform 1) a cabled passive mid-plane capable
of supporting SATA ports from the server board or SAS/SATA ports from an add-in card; 2) an
active SAS / SAS RAID mid-plane. This section will describe the hard drive interface support of
each of the mid-plane boards.
6.3.1
Passive Mid-Plane
The passive mid-plane option is used when the system configuration requires the use of an
add-in SATA or SAS controller or the on-board SATA ports from the server board are used.
The drive control signals are cabled to the passive mid-plane.
The mid-plane plugs directly into the hot swap backplane using two edge connectors, routing
the hard drive signals to the appropriate hard drive connectors on the 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.
Figure 28. Passive Mid-Plane Board
6.3.2
Active Mid-plane with Intel
®
SAS /SAS RAID Support
The active mid-plane is used to provide SAS / SAS RAID support. It has integrated on to it an
Intel IOP80333 IO processor and an LSI* LSLSAS1068 3Gb/s SAS controller. Together they
provide support for up to eight SAS drives in this system. By default, this mid-plane option
provides software RAID levels 0, 1, and 10 utilizing Intel
®
Embedded RAID Technology II. With
the installation of optional RAID enablement devices, the mid-plane can support hardware RAID
levels 0, 1, 5, 10, and 50.
The mid-plane attaches to the hot-swap backplane by two card edge
connectors which eliminates the need for any hard drive cables. The following sub-sections
describe the board level SAS / SAS RAID functionality.