Intel JBOD2312S3SP, Руководство по оборудованию

Страница: 37 / 47

Intel® Storage Server System JBOD2312S3SP Hardware Guide
27
6 JBOD2000S3SP Internal Connection Overview
The Intel ® Storage System JBOD2000S3SP contains one or two SAS expander board(s), power distribution
board, HSBP, and fans in its chassis. This section provides specification of the SAS expander board and SAS
converter, and interconnection between those components.
6.1 Expander Board
The Intel 36-port expander (RES3FV288) is mounted in a retention mechanism at the rear of the chassis that
provides access to the external facing SAS ports, and is designed on PMC’s 12Gb/s expander technology.
The expander has seven SFF8643 mini-SAS HD connectors that connect internally to the backplane and two
externally facing SFF8644 connectors. The dual-port backplane of the JBOD contains two 36-port
expanders, while the single-port backplane contains one 36-port expander.
Features of the Intel ® RAID Expander are as follows:

SAS protocol, described in the Serial Attached SCSI (SAS) Standard, version 3.0

Serial SCSI Protocol (SSP) to enable communication with other SAS devices

Serial Tunneling Protocol (STP) support for SATA II through expander interfaces

Serial Management Protocol (SMP) to share topology management information with expanders

Supports SES for enclosure management

Output mini-SAS HD connectors support sideband SGPIO as per SFF-8448 specification

Supports both Serial Attached SCSI and Serial ATA device targets

12Gb/s, 6Gb/s, 3Gb/s, and 1.5 Gb/s data transfer rates

SFF-8643 and SFF-8644 mini-SAS HD connectors

Provides a low-latency connection to create and maintain transparent access to each connected
SAS/SATA physical drive

Staggered spin-up

Hot-plug

Native Command Queuing

Allows multiple initiators to address a single target (in a fail-over configuration)
SAS Expander Major Components:

36-Port 12 Gb/s SAS-3 Expander Chip
-
Provides 36 PHYs

Any PHYs may be combined into wide port(s)

Any PHY can be SAS or SATA attached
-
Supports multiple data rates and auto-negotiation between the following:

3 Gb/s, 6.0 Gb/s, and 12.0 Gb/s SAS

1.5 Gb/s, 3 Gb/s, and 6.0 Gb/s SATA
-
Supports SSP, STP, and SMP
-
Supports the SAS protocol described in the Serial Attached SCSI (SAS) Standard, version 3.0r5