Bosch Appliances DVA-08K manual SCSI Connection Overview, 5.2.1, SCSI Cables, 5.2.2

RAID Subsystem DVA-08K Installation ManualSubsystem Connection and Operation en 35

5.2	SCSI Connection Overview
	The SCSI host ports connect to SCSI-320 host adapters (HBA) that comply with 320MB/s
	transfer rate and SCSI-3 protocol, best capable of 64-bit/133MHz PCI operation. Connection
	of the subsystem’s SCSI ports is flexible. For example, you may use the two VHDCI ports of a
	dual-stacked connector to connect a host channel to two separate, clustered servers. If high
	availability or path redundancy software is applied, a total of 4 VHDCI ports are available for
	cross-linking to host adapters. As long as access contention is not of the concern, host con-
	nection can be very flexible. In the following sections, configuration diagrams will be provided
	to illustrate the possible uses of the subsystem in different application environments.
	Note that these configurations are only recommendations and do not intend to impose limita-
	tions such as the use of high availability software or cascading multiple enclosures. The same
	configuration principles applies to the subsystem.
	The RAID 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.
5.2.1	SCSI Cables
	One SCSI cable is required with each subsystem for host connection. If you wish to connect
	the second host channel, a second cable is required. Use 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.
5.2.2	SCSI Port on the Controller Rear Panel
	• The SATA-based subsystem is equipped with two dual-stacked connectors on the back of

the enclosure. Each dual-stacked connector comes with two 68-pin VHDCI ports that is specified as a “Channel # In” or “Channel # Out” port.

The SCSI ports are specified as “In” or “Out” for ease of identification. As long as each device on a SCSI bus is assigned with a unique ID and the SCSI bus properly terminated, there are no limitations with connecting a specific SCSI port to the host- or drive-side devices.

Fig. 5.1 Dual-stacked Connectors on the Controller Faceplate

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The subsystem requires an external VHDCI-to-VHDCI SCSI round cable to connect the subsystem to a host adapter.

One (1) audio-jack-to-DB9 cable is provided to facilitate the connection of the COM1 port for local terminal emulation access to the array.

Two (2) power cords are provided for the power connections to the power sources. The RJ-45 Ethernet cable for network management connection is a user-supplied item. Use straight-through Ethernet cables with RJ-45 plugs.

Bosch Security Systems F.01U.027.797 V2 2008.08