Ignite Error: complains about max. physical extends

[Erik Heckers]

I'm using an HP-UX 11.11 server to install
an HP-UX 11.11 client (Ignite B.5.1.33).

Ignite complains about my root disk (35 GB):
--- snip ---
The root volume group parameters specified may result in a non-bootable configuration. (The root volume group is the volume group containing the root file system.) You must go to the "Modify Volume Group Parameters" screen and adjust the parameters. Reducing the "Maximum Physical Extents" or "Maximum Physical Volumes" parameters will probably have the most effect. (To compensate for fewer physical extents, you may need to increase the "Physical Extent Size" parameter.) You may need to move very large disks into a separate volume group or limit the number of disks in the root volume
group. See your LVM documentation for more information.
--- snip ---

The values I see are:
PE size: 8 MB
MAX PE : 20 000
MAX PV : 16
MAX LV : 255

I reduced Max. PV to 2 to solve the problem,
but what I don't understand is what kind of
limit is exceeded here!
I know there is a number of limits for every value but I didn't know there is a combination' of
values that can exceed a limit.
What limit is is and where is is documented?

As far as I understood there are the following
limits:
PE size : 256 MB
LVs: 255
PVs: 255
PE per PV: 65535

Thank You,
Erik

[Steven E. Protter]

This rather large manual probably has the answer concerning documentation.

http://docs.hp.com/hpux/onlinedocs/5187-4555/5187-4555.pdf

It appears that your original configuration was beyond what Ignite is capable of restoring as a bootable configuration.

I don't totally understand either, because if the system boots now, why would it not be able to restore this configuration and boot after a recovery.

I think you did the right thing, making the adjustment.

Perhaps you can arrange a test with one of the old tapes on other hardware or at a performance center.

SEP

[Sridhar Bhaskarla]

Hi Erik,

It's the VGRA. It's written into one extent on each PV like a table. Since one extent is of 8MB in your configuration, the combination of your parameters is exceeding the size of one extent. So, either you have to increase the extent size (say make it 16MB and see) or reduce other parameters.

-Sri