Specifications

Hot Swap Backplane (HSBP) QSSC-S4R Technical Product Specification

8. Hot Swap Backplane (HSBP)

8.1 Introduction

The Hot Swap Backplane (HSBP) provides several main functions for the system. Depending on whether the system

has the SAS Riser installed, the HSBP supports up to eight 2.5-inch SAS/SATA hard drives – in the Enterprise SKU.

Alternatively, when the system does not have the SAS Riser installed, the HSBP can also support up to six 2.5-inch

SATA hard drives by utilizing the six on-board SATA connectors from the main board – in the Value SKU.

8.1.1 Key Features

The board mounts to hooks on the HDD bay and supports the following features:

x Support up to eight 2.5” hot swap SAS/SATA HDD in a horizontal orientation

x Support SAS HDD running at both 3Gb and 6Gb speeds

x Support SATA HDD running at 1.5Gb and 3Gb speeds

x 6Gbit SAS ports provide high-speed serial data paths from the eight attached SAS hard drives to the SAS riser.

x SAS data between drives and riser are routed across two 4-port internal SAS cables that connect the backplane to

the PCIe SAS riser, the RAID controller card (HBA). In turn, the SAS RAID HBA is plugged into the baseboard at

the dedicated SAS riser slot.

x Eight drives are connected to two x4 SFF-8086* SAS connectors that are used to control SAS traffic flow between

drives and the SAS RAID raiser card.

x No mixing of SAS / SATA drives are supported

x No SAS/SATA drive type detection is supported

x Only drive present detect is supported

x SAS enclosure management per SES-2 (System Enclosure Specification) through I2C cable or SGPIO for the SAS

RAID riser

x Server management I2C interface

x Support one half-size 5.25” SATA tape device

x Support one SATA slim-line optical disk device (ODD), DVD-RW

x Maxim VSC410 enclosure management microcontroller

x 8MB FW Flash ROM

x 5V regulator to power HDDs, one slim-line optical device, and for a 5.25" tape device. HSBP board does not

provide 12V power or data signals for the 5.25" tape device.

x “System board” TMP75 temp sensor dedicated for monitoring 5V regulator.

x Two SAS/SATA SGPIOs

x HSBP control

x Power connector for optical drive and tape drive

x HDD Activity LED

x HDD Fault/Rebuild LED

x I2C Serial EEPROM (FRU)

x Ambient temperature sensor

x Voltage regulators

x 12VDC to 5VDC

x Connectors for main input power

x Hard Drive Numbering and Backplane Connectors