HP Xw6200 Adaptec SCSI RAID 2120S: Installation Guide - Page 24

SCSI Termination, channel. Turn the controller's termination setting

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Installing The Controller SCSI Termination Proper termination of channels used with SCSI devices is critical in having the system work properly. The basics of termination are: ■ Use SCSI cables certified for Ultra320 operation to allow the system to work at full speed. Note: The cable that came with your Adaptec SCSI RAID 2120S/2200S controller has a built-in multimode terminator on one end. This is meant to be located at the opposite end of the cable from the attachment to the controller. None of the devices attached to this cable should be terminated. Like this cable, SCSI cables meant for Ultra320 have multimode termination. ■ Enable termination on the physical end of a SCSI cable opposite its connection to the controller (see the note above and the following figure). If the controller is at one end of the SCSI cable, leave the controller's termination set to On for that channel. Turn the controller's termination setting Off only if both internal and external cables and terminators are attached to that channel. Any cables attached to a channel that doesn't have any devices or terminators attached should be disconnected from the controller prior to starting the system. ■ If you are using multiple SCSI channels on a single controller, as is possible on the Adaptec SCSI RAID 2200S, terminate each channel separately. SCSI termination for Adaptec SCSI RAID controllers is configured through ARC. The controller has two possible termination settings: Setting Auto (Default) Disabled Function Used for most cabling conditions. Disables controller termination unconditionally. 2-5

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2-5
Installing The Controller
SCSI Termination
Proper termination of channels used with SCSI devices is critical in
having the system work properly. The basics of termination are:
■
Use SCSI cables certified for Ultra320 operation to allow the
system to work at full speed.
Note:
The cable that came with your Adaptec SCSI
RAID 2120S/2200S controller has a built-in multimode
terminator on one end. This is meant to be located at the
opposite end of the cable from the attachment to the
controller. None of the devices attached to this cable
should be terminated. Like this cable, SCSI cables meant
for Ultra320 have multimode termination.
■
Enable termination on the physical end of a SCSI cable opposite
its connection to the controller (see the note above and the
following figure). If the controller is at one end of the SCSI
cable, leave the controller’s termination set to
On
for that
channel. Turn the controller’s termination setting
Off
only if
both internal and external cables and terminators are attached
to that channel. Any cables attached to a channel that doesn’t
have any devices or terminators attached should be
disconnected from the controller prior to starting the system.
■
If you are using multiple SCSI channels on a single controller, as
is possible on the Adaptec SCSI RAID 2200S, terminate each
channel separately.
SCSI termination for Adaptec SCSI RAID controllers is configured
through ARC. The controller has two possible termination settings:
Setting
Function
Auto (Default)
Used for most cabling conditions.
Disabled
Disables controller termination unconditionally.