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32
en | Subsystem Connection and Operation
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
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Fig. 5.1 Dual-stacked Connectors on the Controller Faceplate
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•
•
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5.2.3
SCSI Termination
Correct SCSI termination procedures require that the last device on the SCSI bus be termi-
nated. If the last device is not terminated or if devices other than the last are terminated,
erratic SCSI bus behavior may occur.
An auto-detection, on-board terminator is built into the DVA-08K. You do not need to install an
external terminator when a subsystem acts as the last device in the daisy chain configuration.
The on-board terminator default is enabled. If the subsystem is not the last device in the daisy
chain configuration, the terminator will be automatically disabled. Although it is not recom-
mended, if you prefer to disable the firmware setting for the on-board terminator using the
LCD keypad panel on the subsystem, RS232C terminal session, or Bosch RAIDWatch manage-
ment software, the auto-detection function is also disabled.
Typically, the host computer or host adapter (SCSI card inside the PC) is the first device and
some are already terminated. When installing the DVA-08K on a SCSI bus with other devices,
be sure to observe the above rules regarding all devices on the SCSI bus. Consult your host
computer and/or host adapter manual for additional information on correct termination pro-
cedures.
NOTICE!
i
It is recommended not to change the firmware default setting for the SCSI terminator so the
auto-detection function can operate.
F.01U.027.797 | V1 | 2006.05
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.
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.
RAID Subsystem DVA-08K | Installation Manual
Bosch Security Systems
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