Thunder i840 S2520
49
Using SCSI
Select
Settings
To select an option, use the arrow keys to move the cursor to the option, then press [
Enter
].
In some cases, selecting an option displays another menu. You can return to the previous menu at any
time by pressing [
Esc]
.
To restore the original SCSI
Select
default values, press
[F6]
from the main SCSI
Select
screen.
SCSI Bus Interface Definitions
•
Host Adapter SCSI ID
—(Default:
7
) Sets the SCSI ID for the SCSI controller. The Adaptec 7899W
is set at
7
, which gives it the highest priority on the SCSI bus. We recommend that you do not
change this setting.
•
SCSI Parity Checking
—(Default:
Enabled
) When set to
Enabled
, verifies the accuracy of data
transfer on the SCSI bus. Leave this setting enabled unless any SCSI device connected to the
Adaptec 7899W does not support SCSI parity.
•
Host Adapter SCSI Termination
—(Default:
Automatic
) Determines the termination setting for the
SCSI controller. The default setting is
Automatic,
which allows the SCSI controller to adjust the ter-
mination as needed depending on the configuration of the connected SCSI devices. We recom-
mend that you do not change this setting.
Boot Device Options
•
Boot Channel
—(Default:
A First
) Specifies which of the two SCSI channels the boot device is con-
nected to (if the computer boots from a SCSI device). If you change this setting, the change auto-
matically applies to both SCSI channels.
•
Boot SCSI ID
—(Default:
0
) Specifies the SCSI ID of your boot device. We recommend that you do
not change the default setting.
•
Boot LUN Number
—(Default:
0
) Specifies which LUN (Logical Unit Number) to boot from on your
boot device. This setting is not valid unless Multiple LUN Support is Enabled
SCSI Device Configuration Options
SCSI Device Configuration options can be set individually for each connected SCSI device.
Note: To configure settings for a SCSI device, you must know its SCSI ID.
•
Sync Transfer Rate
—(Default:
160
) Determines the maximum synchronous data transfer rate that
the SCSI controller supports. We recommend that you leave the maximum (default) value of 160
MBytes/sec.
•
Initiate Wide Negotiation
—(Default:
Yes
) When set to
Yes
, the SCSI controller attempts 16-bit
data transfer (wide negotiation). When set to
No
, the SCSI controller uses 8-bit data transfer unless
the SCSI device requests wide negotiation.
Note: Set Initiate Wide Negotiation to
No
if you are using an 8-bit SCSI device that
hangs or exhibits other performance problems with 16-bit data transfer rate enabled.
•
Enable Disconnection
—(Default:
Yes
) When set to
Yes
, allows the SCSI device to disconnect
from the SCSI bus. Leave the setting at
Yes
if two or more SCSI devices are connected to the SCSI
chip. If only one SCSI device is connected, changing the setting to
No
results in slightly better per-
formance.
•
Send Start Unit Command
—(Default:
Yes
) When set to
Yes
, the Start Unit Command is sent to
the SCSI device at bootup.
SCSI
&
LAN
