Interface Card OL* Support Guide

Chapter 1
PCI Card OL* Overview and Concepts
Planning and Preparation
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This is particularly important if there is no online fail-over or backup card to pick up those functions. For
example:
• Which mass storage devices will be temporarily disconnected when the card is shut down?
• Will a critical networking connection be lost?
A critical resource is one that could cause a system crash or loss of data if the slot were suspended or
disconnected. For example, if the SCSI adapter to be replaced connects to the un-mirrored root disk or swap
space, the system will crash when the card is shut down.
During an OL* procedure, it is essential to check the targeted card for critical resources, as well as the effects
of existing disk mirrors and other situations where a card’s functions can be taken over by another card that
will not be affected. For details using pdweb, see Chapter 2, “pdweb - Peripheral Device Tool Web Interface,”
on page 23