Specifications

For the location of the SAS disk LEDs, see “SAS disk drive LEDs” (page 16).
SAS disk backplane
The SAS disk backplane supports two small form factor hard disk drives. The backplane supports
hot-plugging a single SAS drive at a time. The activity LEDs and drive present LEDs are controlled
by a preprogrammed system-on-chip. The system board hosts the SAS controller and supplies
12 V, 5 V, and 3.3 V standby power to the backplane.
The SAS backplane is connected to the system board with a right angle connector. This connector
is specifically designed for high-speed differential applications, and supports server speeds
exceeding 5 Gigabits per second. Power, sense, and I
2
C signals are routed through this connector
as well as the SAS differential pairs and SGPIO signals.
I/O subsystem
The I/O subsystem is composed of embedded core I/O and up to three mezzanine cards. The
server blade supports the following configurations:
• Up to three type I mezzanine cards
• One type I and up to two type II mezzanine cards using up to x8-PCIe Gen-2 links
The server blade does not support PCI Hot Plug.
Partner blade support
Partner blade slotting rules are dependent on the conjoined blade configuration. For more
information on partner bay blade locations, see “Installing the Scaleable BladeLink” (page 45).
Memory subsystem
The BL860c i2 physical memory subsystem connects two Itanium® processors to two groups of
12 DDR3 DIMMs. Each processor has two memory controllers.
Server blade components 11