Avago Technologies LSI20160 - Manual (Page 95)

Using the NT Configuration Utility 4-27
Copyright © 1993–2001 by LSI Logic Corporation. All rights reserved.
The settings in this menu affect individual SCSI devices attached to the
selected host adapter. Double click on one of the displayed devices to
change the listed options. Use the scroll bar on the right side of the
Device Selections menu to scroll down the list of possible SCSI
IDs/devices.
Table 4.4 provides a description of the fields on this menu.
Table 4.4 Device Selections Fields and Descriptions
Fields
Field Type
[Value]
Descriptions
Sync Rate
(Mbytes/s) Configuration
[20, 40, 80...] Indicates the maximum data transfer rate the host adapter will
attempt to negotiate. The host adapter and a SCSI device must
agree to a rate they can both handle. The width column affects this
value.
Width (bits) Configuration Indicates the maximum SCSI data width the host adapter will attempt
to negotiate. The host adapter and a SCSI device must agree to a
width they can both handle. Only host adapters that can do 16-bit
data transfers have this option enabled.
Disconnect Configuration
[On/Off] Tells the host adapter whether or not to allow a device to disconnect.
SCSI devices have the ability to disconnect from the initiator during
an I/O transfer. This disconnect frees the SCSI Bus to allow other I/O
processes. Some devices run faster with disconnects enabled
(mostly newer devices), while some run faster with disconnects
disabled (mostly older devices).
Read Write
I/O Timeout
(seconds) Configuration
[Value>0] Sets the amount of time the host adapter waits for a read, write, or
seek command to complete before trying the I/O transfer again.
Since this provides a safeguard that allows the system to recover if
an I/O operation fails, LSI Logic recommends that you always set the
time-out to a value greater than zero.
Scan for
Device at Boot
Time Configuration
[Yes/No] Set this option to No when you do not want a specific device
available to the system. Also, on a bus with only a few devices
attached, you can speed up boot time by changing this setting to No
for all unused SCSI IDs.
Scan for SCSI
Logical Units
(LUNs) Configuration
[Yes/No] Set this option to No if you have problems with a device that
responds to all LUNs whether they are occupied or not. For example,
if there is a SCSI device with multiple LUNs but you do not want all
of those LUNs to be available to the system, then set this option to
No. This will limit the scan to LUN 0 only.
Queue Tags Configuration
[Enable/
Disable] Enables or disables the issuing of queue tags during I/O requests
when your device driver can do this.