Important Terms and Concepts

Table 1-1 Terms and Meanings

Term	Meaning
OL*	All aspects of On-line Addition (OLA) and On-line Replacement (OLR) of PCI & PCI-X interface cards. On-line Delete (OLD) is not supported.
Power Domain	A grouping of 1 or more interface card slots that are powered on or off as a unit. Current systems have each slot in a separate power domain.
target card target card slot	The interface card which will be added or replaced using OL*, and the card slot it resides in.
affected card affected card slot	Interface cards and the card slots they reside in which are in the same power domain as the target slot. Currently multi-slot power domains are not implemented.
pdweb	A web-based tool for performing OL* and managing slots and cards, Chapter 2 “pdweb - Peripheral Device Tool Web Interface”.
Attention Button	A hardware tool for performing OL* and managing slots and cards, Chapter 3 “Attention Button - Direct Slot Control”
MRL	Manual Retention Latch. A physical latch that locks a card into position in a slot and influences power to the slot. Also referred to as a latch.
OLX Divider	A physical divider situated between slots and features a power LED, an attention LED, the Attention Button, and an Manual Retention Latch. The OLX Divider might not contain the Attention Button. See your platform documentation for specifics on LED and Attention Button positioning.
CRA	A system check for critical resources on all affected hardware paths associated with the specified slot, analyzing file systems, volumes, processes, networking, swap, and dump; and generates a report of affected resources.
olrad	A command line tool for performing OL* and managing slots and cards, Chapter 4 “olrad - Command Line Interface”.
hotplugd	A daemon that handles events that are generated by pressing the Attention Button corresponding to a PCI I/O slot.

In many cases, other interface cards and slots within the system are dependent upon the target card

If the target card is a multiple-function card (MFC), suspending drivers for the target card slot also suspends individual drivers for the multiple hardware paths on that card. If the target card has multiple ports, then all individual ports will be suspended and then resumed when the card is replaced.
In currently shipped systems, a power domain consists of a single card slot, however future systems may provide multi-card power domains. In this case, if the target card slot is in a multi-card power domain and you temporarily stop power to the target card slot, you will also stop power to any other card slots (affected card slots) in that same power domain.

During card replacement, pdweb & olrad perform a Critical Resource Analysis, which checks all ports on the target card for critical resources that would be temporarily unavailable while the card is shut down.

Important Terms and Concepts

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