Artesyn Centellis 4410 (AXP-1410) Installation and Use (July 2014) - Manual (Page 130)

Configuring and Operating the System
AXP 1410 Installation and Use (6806800H70L) 130
5.7.2.1 Shelf Manager
The shelf manager which becomes active at system start up is dependent on the status of the
partner switch blade. It detects whether a hub blade is present and whether the hub blade’s
ejector handles are closed. Then it negotiates its own active/standby role with its partner
ShMC.
The following table shows which shelf manager becomes active or standby depending on
which hub blades are present in the shelf.
p: Hub blade present
h: Hub blade ejector handles are open
-: Hub blade not present
a: Shelf manager active
s: Shelf manager standby
5.7.2.2 Hub Blade
Hub blades are associated with a shelf manager. Hub 1 with SAM-A and hub 2 with SAM-B.
Table 5-9 Start up Dependencies of the Shelf Manager and the Hub Blade
Left Hub Blade Right Hub Blade Left Shelf Manager Right Shelf Manager
- - a s
- p s a
p - a s
p p a s
- h s a
h - a s
h h a s
p h a s
h p s a