ioconfig_dump

[Alice Seeley]

I am wondering if anyone has any experiences with this unsupported utility, ioconfig_dump? I have a customer that would like to reclaim some of his instance numbers.
See the question that has been posed to me:
The way I originally understood this thing to work is as follows:
Assume we are using 220 Hardware Instance #s, out of 255, on HOST01.

Assume Hardware Instance #s 100 - 150 were used at one time, but are no longer used.

Now, perform the ioconfig_dump utility to free-up 100 - 150.

If we add new devices or Zone the Server to a new SAN Array port, will the OS create new device files starting at Hardware Instance # 100, or will it continue from 221?

Will the OS use all of 100 - 150 before starting again at 221?

[Peter Godron]

Alice,
as it is unsupported and only to be used by HP, very little information available. From what I have found I would suprised if you added new device it would see the "gap" and generate device files starting at 100. Can you specify the device name to be specified?
If you decide to try it, please let us know for future reference what actually happens.

http://www4.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000079970973
http://www4.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000079989085

[Peter Godron]

Alice,
have you tried it out? What were your findings? Please update.

[Steve Steel]

Hi

Try

http://unix.derkeiler.com/Mailing-Lists/HP-UX-Admin/2005-08/0022.html


Steve Steel

[Alice Seeley]

The customer actually performed the ioconfig_dump process with good success. When they rebooted the server and added new disks to it, the disks started to reassign at the lowest number as they had hoped.

[Peter Godron]

Alice,
many thanks for your update!
Just proves, always something new to learn.
Great result.