SPARCbook Portable Workstation User Guide
7-13
Using SCSI Devices
Using a Tadpole SCSI Floppy Disk Drive
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Setting the SCSI Terminator Switch
If the floppy drive is the only external SCSI device connected to your
SPARCbook or is at the end of the SCSI chain, enable the built-in
terminator by moving the
ACTIVE TERM
switch to the Down position.
(Ignore the ON legend printed on the switch.)
If your floppy drive is not connected at the end of the SCSI chain,
disable the terminators by moving the
ACTIVE TERM
switch to the Up
position.
Note
Only the device at the physical end of the SCSI chain should be terminated. All other
devices should have their terminators removed or switched off.
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Creating the Special Files – at Boot Time
Before filesystems can be created or accessed on a floppy disk, special
files must exist. To create the special files during the boot process the
following procedure is used:
1.
Press the power on button.
2.
When the OpenBoot start-up screen is displayed, press
Pause-A
.
The OpenBoot ok prompt is displayed.
3.
Enter the following command:
ok boot -r
The
-r
option causes the SPARCbook to carry out hardware
reconfiguration. In this example, the SPARCbook detects the floppy
disk drive and creates the following raw and block special device files
to allow the data on a floppy to be accessed:
/dev/diskette
/dev/rdiskette
Figure 7-4 Terminator Switch
Down (On)
Up (Off)
S3UG4_Book Page 13 Friday, August 8, 1997 11:37 am
