HP Integrity rx3600 Server User Service Guide

Figure 7 Diagnostic Panel
Mass Storage
The server mass storage subsystem (SAS) features the following SAS components:
• Hard drives
• Cables
• Backplane board
• Core I/O cards
The server can contain up to eight SAS disk drives. The drives have LEDs that indicate activity and
device status, and an LED used to locate each drive. Additionally, there is a set of slot availability
LEDs positioned in the middle of the disk drive bays on the front of the chassis. The illuminated
LEDs indicate connection and power from a SAS controller to the bank of SAS disk drive slots.
The disk drives plug directly into the SAS backplane board. There is one SAS backplane board
in the server.
Two cables connect from the SAS backplane board to the SAS core I/O card. Service the SAS
backplane board and SAS core I/O card from the top of the chassis.
Firmware
Firmware consists of many individually linked binary images that are bound together by a single
framework at run time. Internally, the firmware employs a software database called a device tree
to represent the structure of the hardware platform and to provide a means of associating software
elements with hardware functionality.
The firmware incorporates the following main interfaces:
Processor Abstraction Layer (PAL) PAL provides a seamless firmware abstraction between the
processor and system software and platform firmware.
Firmware 27