Reconfiguring the Kernel in HP-UX Release 11i Version 1.5

Reconﬁguring the kernel in HP-UX Release 11i Version 1.5

Reconﬁguring the Kernel

Chapter 1 9

NOTE You only need to do the next steps if you are changing hardware, such as adding

new peripherals. If you are only adding or removing a kernel module, or

simply changing a static kernel parameter, reboot the system to active the

new kernel with shutdown -r.

7. Bring the system to a halt using the shutdown command.

8. Turn off the power to all peripheral devices and then to the SPU.

9. Install the hardware or remove interface cards or peripheral devices. Refer to the

documents shipped with the products being installed and to Conﬁguring HP-UX for

Peripherals for speciﬁc instructions.

10.Turn on the power to all peripheral devices. Wait for them to become “ready”, then turn on

power to the SPU. The system will attempt to boot the new kernel.

If the New Kernel Fails to Boot

If the new kernel fails to boot

1. Boot the system from the backup kernel (/stand/vmunix.prev) and repeat the process of

creating a new kernel. See the section “Booting From an Alternate Kernel,” in Chapter 3,

“Conﬁguring a System,” in Managing Systems and Workgroups: A Guide for HP-UX

System Administrators for information on rebooting from a backup kernel.

2. Remove the “bad” kernel. As soon as you boot from the backup kernel, remove the “bad”

unbootable kernel using the -d option of the kmupdate command:

kmupdate -d /stand/vmunix

NOTE This step is necessary to avoid removing from the system the component ﬁles of

the currently running backup kernel (/stand/vmunix.prev).With the -d

option of the kmupdate command you have removed all the kernel

component ﬁles associated with the un-bootable kernel /stand/vmunix.

Now it is safe to repeat the process of conﬁguring a new kernel and

performing a kernel update without overwriting /stand/vmunix.prev with

the“ bad” kernel. Once /stand/vmunix has been removed, there is no longer

a default kernel from which to boot, until a new kernel is conﬁgured and

updated via the kmupdate command.