Advantech RAID-800S, Installation Reference Manual

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Chapter 3 Installation Overview 2 5
Description
Normal operation.
Drive failure.
Hard drive is powered off or no drive is installed
in the slot.
LED Color
Green
Orange
Red
3.3 Connecting External SCSI Devices
Your subsystem supports Ultra Wide SCSI which provides very fast 40
Mbps transfer rate using a 16-bit SCSI bus. It allows you to connect a
wide range of SCSI devices such as CD-ROMs, hard drives, tape drives
and optical devices. This section describes the location of the host
channels and instructions on connecting external SCSI devices.
3.3.1 Host Channels
Your subsystem is equipped with two host channels located in the RAID
Disk Array Controller. Refer to section 1.4.1 (figure 1-3) for the locations
of the host channels.
3.3.2 How the Host Channels are Connected
Your subsystem uses 2 internal SCSI cables, one for each host channel.
One end of the internal SCSI cable is connected to a host channel and
the other end mounted at the rear of the subsystem. With 2 internal SCSI
cables connected, a total of 2 Centronic connectors are installed at the
rear of the subsystem.
3.3.3 Connecting an External SCSI Device
1. Configure the SCSI ID of each device. (Refer to Chapters 4 to 6 for
more information.)
2. Connect the external SCSI device between the host and the RAID-
800S subsystem, then enable the terminator on the setup menu of the
RAID-800S. (The RAID-800S subsystem should always be put
farthest away from the host than all the other external SCSI devices.)