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alternate kernel.

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alternate kernel.


how to boot the system from the alternate kernel, rx-2660 while installing kernel patches kernel rebuild failed , now os got corrupted, can i boot from alt kernel,

how to boot it?

Pete Randall
Outstanding Contributor

Re: alternate kernel.

I had a similar question when I was first installing 11.23. In the beginning of this question I describe the pre-11.23 method, then the rest of the thread points out the 11.23-forward method.


Pete Randall
Outstanding Contributor

Re: alternate kernel.

Don Morris_1
Honored Contributor

Re: alternate kernel.

Interrupt at the boot loader (after the EFI shell chooses the boot volume) and:

hpux ls

(lists possible configurations, I'd expect a "backup" or "last_install")


hpux backup/vmunix

or whatever else is appropriate for your alternate configuration.
Acclaimed Contributor

Re: alternate kernel.

Boot (power on) the system, wait for the boot menu, let the system start to boot from the disk, interrupt the process now and you are on the hpux> boot prompt.

(C) Copyright 1999-2006 Hewlett-Packard Development Company, L.P.
All rights reserved

HP-UX Boot Loader for IPF -- Revision 2.028

Press Any Key to interrupt Autoboot
\efi\hpux\AUTO ==> boot vmunix
Seconds left till autoboot - 9

Press a key now!
Now boot the backup kernel.

HPUX> boot backup

Hope this helps!

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those who understand binary, and those who don't.

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Suraj K Sankari
Honored Contributor

Re: alternate kernel.

Booting from the EFI Shell
1.Access the EFI Shell.

From the system console, use the up/down arrow keys to select the â EFI Shellâ entry from the EFI Boot Manager menu to access the shell.

2.Access the EFI System Partition for the HP-UX boot device.

Use the map EFI Shell command to list the file systems (fs0, fs1, and so on) that are known and have been mapped.

To select a file system to use, enter its mapped name followed by a colon (:). For example, to operate with the boot device that is mapped as fs0, enter fs0: at the EFI Shell prompt. When you hit Enter to complete the command the shell prompt will change to reflect your device selection: (fs0:\>)

3.Enter HPUX at the EFI Shell command prompt to launch the HPUX.EFI loader.

If needed, you can specify the loaderâ s full path by entering \EFI\HPUX\HPUX at the EFI Shell command prompt.

4.Allow the HPUX.EFI loader to proceed with the boot command specified in the AUTO file, or manually specify the boot command.

By default, the HPUX.EFI loader boots using the loader commands found in the \EFI\HPUX\AUTO file on the EFI System Partition of the selected boot device. The AUTO file typically contains the boot vmunix command.

To interact with the HPUX.EFI loader, interrupt the boot process (for example, type a space) within the time-out period provided by the loader. To exit the loader use the exit command

For more information see the below link