PCI Token Ring Administrator's Guide

Installing Token Ring
Step 2: Installing Token Ring Hardware
Chapter 128
The letters O, L, A, and R stand for On Line Addition [and] Replacement.
HP-UX 11i systems (L-Class, N-Class, and Superdome) are capable of
allowing OLAR-capable adapters to be added or replaced without the
need to shut down or reboot. The system hardware uses the per-slot
power control combined with operating system support to enable this
feature.
Certain classes of hardware are not intended for access by users. At this
time, these include V-Class and Superdome systems. HP recommends
that these systems be opened only by a qualified HP engineer. Failure to
observe this requirement can invalidate any support agreement or
warranty to which the owner might be entitled.
NOTE If you plan to use OLAR, you may need to update your system firmware.
For details about specific platforms, please refer to the Readme Before
Installing or Updating to HP-UX 11i document provided with your
system.
Important Terms and Concepts of OLAR
The addition or replacement of an OLAR-compatible card may be done in
either one of two ways:
1. Using the SAM utility.
2. Issuing command-line commands using rad.
Table 1-3 Important Terms
Term Meaning
OLAR All aspects of the OLAR feature
including On-line Addition (OLA) and
On-line Replacement (OLR).
Power Domain A grouping of 1 or more interface card
slots that are powered on or off as a unit.
(Note: Multi-slot power domains are not
currently supported.)