Cabling - Accusys ACS-9910 User Manual

Cabling

In its basic configuration (without the addition of an optional daughterboard), ACS-9910
supports up to four SCSI channels (the location of connectors for each channel is shown in
the Rear View section of Chapter 1). . Each controller channel supports up to 15 device drives.
When planning the cable requirements, keep in mind basic SCSI rules regarding bus
termination and maximum cable length, in order to avoid performance problems.
1. Connect a SCSI cable from each hard disk
drive in the intended array to a disk SCSI
connector on the backplane.
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Read the pre-installation notices earlier in this chapter before proceeding with
cabling.
The hard drives in a RAID should match in size and speed. All drives in any
array should be identical models with the same firmware versions. RAIDs can
use any size drive, however the smallest drive will determine the size of the
array.
Enable/disable term power on each drive, depending on the drive
characteristics.
Set a unique SCSI ID address on each drive
Each channel controller reserves SCSI ID 7 by default.
If you install a terminator on a SCSI bus, you should disable SCSI termination
by the controller using the control panel or Monitor Utility.
ACS-9910 User's Manual