Controller Configuration
Manual No. 775029
3-11
❑
View/Modify Bus Speed.
Default = 20MHz
The SCSI Transfer Bus Speed (MHz) function sets the maximum transfer
rate for each drive channel. The default setting is 20MHz. This setting
produces 20 MB/sec transfers for Fast SCSI and 40 MB/sec transfers for
Wide and Ultra SCSI. In general it is not necessary to change this parameter
since the controller “negotiates” the supported transfer rate with all of the
drives.
☛
Note
Problems communicating with a drive can be caused
by several conditions; e.g., improper termination,
wrong drive ID setting, SCSI cable is too long, faulty
equipment, etc.
However, if you do wish to change this setting...
☞
Use the arrow keys to select the Bus Speed (MHz) field for the
desired channel, then...
☞
Press the + or - key to set the desired value,
OR
☞
Press Spacebar to display a box of available choices, use the
arrow key to select your desired value, then press Enter.
☞
Repeat the steps above for other controller channels if
necessary.
❑
View/Modify the Tag Queueing Setting.
Default = Yes
The Tag Queueing setting controls SCSI command tag queuing support for
each drive channel. This allows drives to work on multiple commands at the
same time. This function normally remains enabled (Yes). Disable (switch to
No) only when using older SCSI drives not supporting command tag
queuing.
