Sun Microsystems Netra CT Service Manual page 97

3. You can only remove a card if all of these LEDs are in the following states:
I
I
I
Do not remove any card from the system if any of the LEDs is not in the proper
state.
6.1.1.2 Rules and Restrictions for Hot-Swapping the Host CPU Card
Following are the rules and restrictions you must understand before hot-swapping a
host CPU card:
1. You must have the alarm card and system controller board installed in the Netra
CT server before you can hot-swap the host CPU card.
2. When you remove a host CPU card from a server while the server is running, it
will disable the CompactPCI bus, which means that the connection with all I/O
cards installed in the server will be lost. Once the CompactPCI bus is disabled,
MCNet will also become disabled in the system.
After you install the host CPU card back into the server, it will enable the
CompactPCI bus and will attempt to connect to all occupied card slots.
Satellite CPU cards are unaffected by the disabling of the CompactPCI bus; they
will continue to function as stand-alone processors when you hot-swap a host
CPU card.
3. If the host CPU is at the OpenBoot prompt (the ok prompt) and you want to hot-
swap the host CPU card, you must power off the host CPU slot through the alarm
card.
To power off the host CPU slot in a Netra CT server, access the alarm card and,
through the alarm card command line interface, enter:
cli> poweroff host
Refer to the Netra CT Server System Administration Manual for more information on
accessing the alarm card.
Use the poweron command to power on the host CPU card once you've installed
the replacement host CPU card.
4. If you are installing a Netra CP2140 host CPU board into a Netra CT server, do
not change the default SMC module switch settings on the SW0501 switches. The
Netra CT server supports high availability hot swap; however, because the alarm
card controls the high availability on the Netra CT server, the settings on the
Amber Okay to Remove LED on the system status panel is on
Green Power LED on the system status panel is off
Blue Hot Swap LED on the board is on
Chapter 6 Removing and Replacing Hot-Swappable Cards 6-7