Product Overview
Intel® Server Board SE7520BD2 Technical Product Specification
26
Revision
1.3
78 AD[49]/CBE[4]#
Ground
79 +VI/O
(3.3V/1.5V)
AD[48]/CBE[5]#
80 AD[47]
AD[46]
81 AD[45]
Ground
82 Ground
AD[44]
83 AD[43]
AD[42]
84 AD[41]
+VI/O
(3.3V/1.5V)
85 Ground
AD[40]
86 AD[39]
AD[38]
87 AD[37]
Ground
88 +VI/O
(3.3V/1.5V)
AD[36]
89 AD[35]
AD[34]
90 AD[33]
Ground
91 Ground
AD[32]
92
Riser Presence 1
Riser Presence 0
93 Slot2
REQ Ground
94 Ground
Slot2
GNT
Note:
The signals in red represent modifications from the standard PCI-X 2.0 pin-out; however, the PCI-X 2.0
compliant cards can still be used.
2.9.3 Ultra-320
SCSI
Controller
The Server Board SE7520BD2 provides an embedded dual-channel SCSI bus through the use
of an LSI* AIC-1030C SCSI controller. The AIC-1030C controller contains two independent
SCSI controllers that share a single 64-bit/100-MHz PCI-X mode 1 bus master interface as a
multifunction device, packaged in a 456-pin BGA. Internally, each controller is identical, capable
of operations using either 16-bit SE or LVD SCS providing 40 MBps (Ultra-wide SE), 80 MBps
(Ultra 2), 160 MBps (Ultra 160/m) or 320 MBps (Ultra 320/m). Each controller has its own set of
PCI configuration registers and SCSI I/O registers. The Server Board SE7520BD2 supports
disabling of the onboard SCSI controller through the BIOS setup menu.
The Server Board SE7520BD2 provides active terminators, termination voltage, a polyswitch
fuse, and a protection diode for both SCSI channels. By design, the onboard terminators are
enabled and no ability is provided to turn off the terminators. The user should plug-in the SCSI
devices in such a way that the SCSI controller is always at one end of the SCSI bus. This
provides either RAID 0 (integrated striping) or RAID 1/1e (integrated mirroring/enhanced)
support. The array will not span across multiple channels. All array drives need to be on one
channel only.
2.9.4
Modular RAID on Baseboard (MROMB)
The Server Board SE7520BD2 baseboard provides the hooks to support Modular RAID on
Baseboard (MROMB).
The PCI-X IRQs for slot 2 are PAIRQ<7..4>. During normal operation (no MROMB installed),
the PAIRQ 6 and 7 are shared between the SCSI device and PCI-X slot 2. When MROMB is
installed, these interrupts are disconnected from the PXH and used between the SCSI controller
and the PCI-X slot with the MROMB card. The following diagram outlines the connections on
the baseboard.