Artesyn Centellis 4410 (AXP-1410) Installation and Use (July 2014) - Manual (Page 138)

Configuring and Operating the System
AXP 1410 Installation and Use (6806800H70L) 138
The active shelf manager synchronizes the shelf FRU information with the shelf FRU
information of the newly inserted shelf manager board. The active shelf manager sends HPI
events from the redundancy sensor (redundancy regains).
The system manager detects a shelf manager board insertion while receiving hot swap events
and later HPI redundancy event sensor. The system manager reads the HPI redundancy sensor
to retrieve the shelf manager redundancy status.
5.7.3.5 Shelf Manager Extraction
Extraction is a redundant operation when the shelf manager board leaves the cluster and can
be safely extracted. It is a planned operation initiated by the system manager. It is only possible
to extract the standby shelf manager. If you want to extract the active shelf manager, a
switchover has to take place so that the active shelf manager becomes standby and can then
be extracted.
To power down the standby shelf manager board the system manager performs the following
steps:
1. Reads the HPI redundancy sensor to detect which physical shelf manager board is active
2. Powers down the standby shelf manager board
3. Receives HPI redundancy event sensor (redundancy lost)
4. Receives HPI hot swap event
5. Reads the HPI redundancy sensor to retrieve the shelf manager redundancy status
The active shelf manager deactivates the standby shelf manager board under the control of the
system manager. It can be safely extracted afterwards.
The active shelf manager sends an HPI redundancy event (redundancy lost) to the system
manager.
5.8 Blade Insertion and Extraction
This section describes the steps that are carried out by the software when a blade is inserted or
supposed to be extracted.