How to boot the server into maintenance mode using NIM?
If we want to boot a
server into maintenance mode without the installation media, then we can
achieve this by the NIM server using SPOT. Please find the steps below.
Note: The spot which is used to boot your target server to maintenance mode needs to be the same version and the same TL of the target server
Login to the NIM master and perform the below steps:
The below steps is for allocated the boot image
to the network for the client system to find and boot.
smitty nim_mac_op
select
client
maint_boot
= enable a machine to boot in maintenance mode
Select
SPOT
Enable
maintenance boot (Select values in entry fields)
Press enter and confirm the smit gives OK
prompt.
Now boot the client (target) system in SMS mode so that
we can select the network adapter that the client system will get the boot
image from the network.
Reboot
your Client and Get into SMS mode.
press
1 to get into the SMS menu,
In the SMS menu the first screen we get is
the one given below.
ü Utilities
ü Remote Initial Program Load Setup -->
(we need to select the correct adapter to set RIPL IP parameters)
ü Enter IP parameters
ü Specify the Client IP
( IP of the client server), Server IP ( IP of
the NIM Server ), Check if the subnet mask is correct and Specify the gateway.
ü Come back to the Main
menu, by pressing X
ü Select the boot option
ü Select install/Boot Device,
and select the Network card
ü We need to select the
ethernet adapter to boot from
(Once you select the adapter you are going to
boot from, you will be asked what type of boot you would like to perform.)
ü Select"Normal mode
boot"
ü Exit from SMS menu by
pressing X,
(Now The system will issue the bootp request to the
master and begin the network boot and allow you to access maintenance mode)
Once booted from Nim spot, accessing rootvg to
perform maintenance.
ü On the maintenance
mode, select option 1 for Access a root volume group
ü Select the volume group
ü Access this volume
group and select a shell
you will see the prompt #.
(now you can go with your maintenance activity)
