Bosch DVA-08K Manual De Usuario

RAID Subsystem DVA-08K | Installation Manual

Subsystem Connection and Operation | en 35 

Bosch Security Systems

F.01U.027.797 | V2 | 2008.08

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.

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.

•

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.

Dual-stacked Connectors on the Controller Faceplate

•

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.