2.4 Machine Sp ecic Instructions 15
shutdown -h now
Once you receivea\
>
" prompt, make sure all the SCSI devices connected to the
machine are turned on, and type:
test -c
This will run a self-test of the DECstation and, in the process, display a listing of
each SCSI device connected to the machine. For example, if you have a TK50 tape
drive, you should see an entry similar to:
U[5] Dev type 1 TZ
RMB 0xd0 rmv mda TZK50
Vrs 1
Format 0
Add len 0
The important thing to note is the \U[5]". This indicates the device is connected
as SCSI ID 5. Examine the display and note which devices are in use. Any ID's
between 0 and 6 which do not show a connected device can b e used for the
DAT-
Link
. Note that although the
DAT-Link
's ID switch go es up to 9, settings 8 and
9 are reserved for factory testing. ID 7 is reserved by the host computer. For
the following instructions, we will assume that the device ID chosen was 4. If you
choose a dierent ID, make sure you replace \4" with the chosen ID b efore typing
any commands that follow.
Connecting the
DAT-Link
The next step is to connect the
DAT-Link
to the computer. Since it is necessary to
unterminate the SCSI bus temp orarily, it is recommended that you shut-down and
turn o the computer before making the connection.
The
Options
switches on the rear of the
DAT-Link
should b e set with all switches
down. Then connect the
DAT-Link
to the computer using the SCSI cable. If the
DAT-Link
is the last device on the SCSI bus, be sure to connect the provided SCSI
terminator between the cable and the
DAT-Link
's SCSI connector. Failure to do
so can cause problems with rebo oting the DECstation. Once it is hooked up and
powered on you can reb oot the computer. If you have trouble reb o oting, verify that
the SCSI ID selected on the
DAT-Link
was not one that was already in use.
As the computer starts
UNIX
,you should see a line similar to:
tz4 at sii0 slave 4 (TZxx) [TCT DAT-Link 1420]
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