Configuring HP-UX For Peripherals

Chapter 6 177
Configuring Magneto-Optical Devices
Magneto-Optical Disk Library Configuration Guidelines
Configuring HP-UX for a Magneto-Optical Disk
Library
The simplest way to configure a magneto-optical disk library is to use
SAM (/usr/sbin/sam). If SAM is not loaded on your system or if you
prefer to use the command-line interface, the following procedure will
guide you through the task. Understand the instructions before getting
started.
Step 1. On your host computer system, invoke /usr/sbin/ioscan -fn to figure
out what addresses are available on the SCSI interface to which you'll be
attaching the optical disk library.
Observe the following single-ended SCSI guidelines:
• Each host adapter card has a maximum of seven available SCSI
addresses (6-0) in order of descending priority, with address seven
reserved for the host adapter.
• The optical disk library systems (C11 x 0A and C17 xx A/C/T) use up to
five SCSI addresses — one for each of the magneto-optical disk drives
and one for the auto changer mechanism.
• Observe the maximum single-ended SCSI cable length of six meters.
Step 2. Using the hardware documentation as your primary source:
• Physically set up the optical disk library (separate from the host
system).
• Assign unique SCSI addresses to each disk drive and autochthons
c. Specifying schgr or sdisk causes sctl, c700, and wsio to be
included in the kernel.
d. c#t#d# derives from ioscan output: c# is the card instance for the
class of interface card to which the device is attached, t# is the
address of the device on the interface, d# is the device unit number.
#[a|b] specifies disk platter number and surface.
e. Specifying scsi2 causes cio_ca0 to be included automatically in
the kernel.
f. Specifying disc3 causes target to be included automatically in the
kernel.
g. Specifying scsi1 causes sio, pfail, and pa drivers to be included
in the kernel.