Townshend Computer Tools DAT-Link User Manual page 16

12
Make sure the Options switches on the rear of the
down. Then connect the
DAT-Link
is the last device on the SCSI bus, be sure to connect the provided SCSI
terminator between the cable and the
Once it is hooked up and powered on you can reboot the computer. If you have
trouble rebooting, verify that the SCSI ID selected on the
that was in use. Note that you may, during boot-up, encounter a message similar
to:
st1: warning, unknown tape drive found
This can be safely ignored.
Con guring the Device Drivers - SunOS 4.1.x
Next, you need to create a device in the
be a character device with the major and minor device numbers corresponding to
a standard 1/4 inch tape drive at the SCSI address selected on the
DAT-Link
for example, the
commands:
/etc/mknod /dev/datlink0 c 18 5
chmod 666 /dev/datlink0
For SCSI ID 4, the equivalent commands are:
/etc/mknod /dev/datlink0 c 18 4
chmod 666 /dev/datlink0
Note that you will need to be logged in as
For more complex con gurations where other SCSI ID's are used consult the section
below regarding SUN's device number methods for SCSI tape drives. You can now
proceed with the software installation in Section 2.6 below.
Device Driver Numbering - SunOS 4.1.x
SUN's minor device naming above may seem to imply that the minor device corre-
sponds to the SCSI ID. In general, this is not the case. For example, on a typical
Sun 4/470 kernel, tape devices are con gured in the kernel such that the following
boot-time messages are generated:
si0 at vme24d16 0x200000 vec 0x40
DAT-Link
DAT-Link
to the computer using the SCSI cable. If the
DAT-Link
's SCSI connector.
/dev
directory called
is set for SCSI ID 5, the device can be created with the
to execute the above commands.
root
Installation
are set with all switches
DAT-Link
was not one
datlink0
. It should
DAT-Link
. If,