Infortrend A12U/A08U-G2421 User Manual download pdf (Page 51)

Chapter 4: Connection and Operation

Chapter 4

System Connection and Operation

This chapter introduces sample topologies, configuration options and server

connections for the EonStor subsystems and discusses both the power on and power

off procedures.

4.1 SCSI Connection Overview

The EonStor A12U and A08U subsystems support 2 SCSI host channels and 2 dual-

stack connectors featuring support for SCSI-320 protocol (also known as Ultra-320),

the latest iteration of the SCSI drive interface standard. The SCSI-320 enables

maximum data transfer rates up to 320MB/second per channel from host computers

to the subsystems or expansion systems. This is twice the bandwidth as the Ultra160

standard, allowing you optimal performance and flexibility with configuring storage

applications.

4.1.1 SCSI Cables

One SCSI cable (IFT-9270UJBODCab) is provided with each subsystem for host

connection. If you wish to connect the second host channel, a second cable must be

separately purchased. Purchase only high quality SCSI-320 cables from a reputable

manufacturer. To ensure optimum performance, it is necessary to use proper, high

quality SCSI-320 compatible cables. Failure to do so will result in downgraded

performance.

4.1.2 SCSI Port on the Controller Rear Panel

The SATA-based subsystems are equipped with two dual-stack VHDCI connectors

on the back of the enclosure. (See Figure 4- 1) Each 68-pin VHDCI connector is

specified as “Channel # In” or “Channel # Out” port.

SCSI Connection Overview

4-1

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Infortrend A12U/A08U-G2421 User Manual Page 51