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8 Channel Management
This section describes the available Channel Management tasks; these tasks may be selected
from the RAID subsystem menu in the left tree node of the ProRAID Manager screen.
Before configuring the subsystem, you must first understand some basic SCSI concepts so
that the subsystem and SCSI devices will function properly.
8.1 Multiple SCSI Format Support
The subsystem support the SCSI interface standards listed below. Note that the data bit and
cable length restrictions must be followed.
SCSI Type
Data Bit
Data Rate
Cable Length
Ultra Wide SCSI
16 Bits
40 MB/Sec
1.5 m
Ultra 2 Wide SCSI
16 Bits
80 MB/Sec
12 m
Ultra 160 Wide LVD
16 Bits
160MB/Sec
12 m
Ultra 320 LVD
16 Bits
320MB/Sec
12 m
8.2 Host SCSI ID Selection
A SCSI ID is an identifier assigned to SCSI devices which enables them to communicate with
a computer when they are attached to a host adapter via the SCSI bus. Each SCSI device,
and the host adapter itself, must have a SCSI ID number (Ultra 320 LVD SCSI = 0 to 15).
The ID defines each SCSI device on the SCSI bus. If there are more than one SCSI adapter in
the Host subsystem, each adapter forms a separate SCSI bus. SCSI IDs can be reused as
long as the ID is assigned to a device on a separate SCSI bus. Refer to the documentation
that came with your peripheral device to determine the ID and how to change it. The
subsystem must be assigned a unique SCSI ID ranging from 0 to 15 for the Ultra 320 LVD
SCSI host system. The default value is ID 0.
8.3 Configuring Channel Options
To configure channel options, move the mouse cursor to
Channel Manager
link, and click
on the
Edit
button. On this screen you can configure your channel using the drop down lists
to select the relevant parameters.
The Channel Information screen gives you details about the channel such as the SCSI ID,
Synchronized Speed, Max Transferred Speed, Wide, Tag Queue, etc.