Uninstall HP-UX 11.0 and Install HP-UX 10.20

[Michael Neo]

Hi,

I need to uninstall HP-UX 11.0 on my K-class server and reinstall 10.20. How do I go about doing it.

Regards,
Michael

[Steven E. Protter]

If you want to go from the world of support 11.00 to the world of obsolete and not supported:

1) Backup up your data.
2) Make sure 10.20 will run on your hardware
3) Stick the 10.20 cored media in the cd-rom
4) boot the box

interupt the boot at the 10 second prompt at the console

sea

boot p3

if p3 is the cd-rom
consult your latest hardware report so you know which random access device is the cd, usually its the last one.

Now your are installing.

One last piece of advice: Don't do it without a good reason. Downgrading to an unsupport3ed release is a bad idea.

SEP

[Sunil Sharma_1]

Hi,

1. backup your data, root vg using Ignite and data using any other utility like tar,fbackup etc

2. Reboot server using 10.20 core media and follow instructions.

K-Class support 10.20.

but 10.20 is no more supported from HP so be careful..

Sunil

[Michael Neo]

Will this be a clean installation (e.g. all the files in 11.0 being removed/overwritten)?

Thanks.

[Sridhar Bhaskarla]

Hi Michael,

If the OS is mirrored, then reduce the mirrors on one disk and install 10.20 on the unmirrored disk. That way you will have 10.20 on one disk and 11.0 on the other and you can boot from wherever the disk you want. To find out the mirrors do

lvlnboot -v

You should see two boot disks. For each Logical volume in vg00, you should see a mirror on the other disk.

vgdisplay -v vg00 |grep "LV Name"|awk '{print $3}'

gives you all the lvols in vg00. For each lvol do

lvdisplay -v /dev/vg00/lvolx |more


To reduce the mirrors, do

lvreduce -m 0 /dev/vg00/lvolx /dev/dsk/cxtydz
Once it is done for all the LVs, do

vgreduce vg00 /dev/dsk/cxtydz

Note the path of /dev/dsk/cxtydz (lssf /dev/dsk/cxtydz) and install 10.20 on it.

Also, before attempting to do anythign make sure you have a good make_tape_recovery tape in hand.

I echo others that 10.20 is not supported anymore. So, you will have to do it at your own risk.

-Sri

[Sยภเl Kย๓คг]

Yes it has to be.Mormally HP 11.00 cannot be downgraded to 10.X,i haven't seen yet.
regards
SK

[Dave Unverhau_1]

Michael,

Something in your second post got me wondering about your reason for this exercise...are you doing this because you're selling the system and want to be sure you're not releasing any sensitive data?

If so, a reinstall will not ensure that *all* your data is overwritten. If you have drives that are not part of vg00, it would still be possible for somebody to access the data on them. You might want to make sure these are overwritten with mediainit or dd. Others here might have additional comments.

Best Regards,

Dave

[Rick Garland]

Backup your wanted data - reload from scratch the 10.20 version