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vPars in nPar, partition configuration lost concerning.

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stephen peng
Valued Contributor

vPars in nPar, partition configuration lost concerning.

guys,
I never deal with vPars, and I am concerning partition configuration lost at hardware maintenence, my questions are:
1, can I boot the nPar where those vPars within? then if I lost the nPar configuration, I could boot the nPar then add those resource belong to it back to it.
2, are all vPars' configuration store in their own boot disk, so missing vPars's configuration is nearly impossible?
if there is any other thing I should take care, please let me know.

regards
Stephen
18 REPLIES
Jayakrishnan G Naik
Trusted Contributor

Re: vPars in nPar, partition configuration lost concerning.

Hi Stephen,

What kind of Hardware maintenance will be carried out on npars?

The OS as well have major role in handling and keeping partition information and I didn't find any chance of loss. Hope your OS disks are intact.

You can mention what actually worries you about hardware maintenance.

Thanks & Regards
Jayakrishnan G Naik
stephen peng
Valued Contributor

Re: vPars in nPar, partition configuration lost concerning.

J.G.N,
I need to replace a superdome's HUCB, and I've never deal with vPars, so I am worrying about vPars or nPars configuration lost. by the way, ctl+A be used to control vPars' console?

regards
Stephen
melvyn burnard
Honored Contributor

Re: vPars in nPar, partition configuration lost concerning.

firstly, the HUCB may be one of the boards that can be replaced on-line, so it wouldn't matter.
Secondly, each boot disk in an nPar has a copy of the vpdb file (vpars database) which holds the configuration, so there is no need to worry here.
If you DID want to bot into nPar mode, it will depend on whether you have a PA-RISC or an Integrity Superdome.
My house is the bank's, my money the wife's, But my opinions belong to me, not HP!
Torsten.
Acclaimed Contributor

Re: vPars in nPar, partition configuration lost concerning.

There is nothing stored on the HUCB.


The nPar configuration in the first generation Superdome (not Superdome 2) is stored in each cell and the MP. For Superdome 2 the configuration is stored on other places, but also redundant (both nPar and vPar).

The vPar configuration is stored on each boot disk, synchronized every couple of minutes.

So you usually cannot loose anything, don't worry.

Hope this helps!
Regards
Torsten.

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Torsten.
Acclaimed Contributor

Re: vPars in nPar, partition configuration lost concerning.

The HUCB is the board where many cables are plugged in (clocks, USB from second cabinet, SMS and customer LAN, etc ...), replacement is offline - not hot-swap.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
Steven E. Protter
Exalted Contributor

Re: vPars in nPar, partition configuration lost concerning.

Shalom,

When your system boots the npar should start up all by itself.

The npar is normally configured to start up a system running vpmon, which starts up the vpar monitor.

From there, other vpars can be configured to auto start with the auto start with the vparmodify -B command.

If you are losing configuration, there is a hardware based battery that might need to be replaced. It backs up the basic npar configuration.

The first time you configure the napr, you may need to configure it to auto start, though most HP-UX systems with this capability ship that way.

This is a really fun area to learn and I'd be happy to help further.

I have some good documents on the subject I downloaded from HP because they are playing musical document locations and its tough to find stuff right now.

SEP
Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
Jayakrishnan G Naik
Trusted Contributor

Re: vPars in nPar, partition configuration lost concerning.

Hi Stephen,

Hope you are very relaxed now to know things better from experts. The hardware maintenance not going to affect the partitions.

And as you mentioned, By using the key sequence ctrl-a, the administrator can switch between the virtual consoles for each vPar.

Thanks & Regards
Jayakrishnan G Naik
stephen peng
Valued Contributor

Re: vPars in nPar, partition configuration lost concerning.

guys,
thank you all for your valuable messages to me!
there are still something confusing me:
1, can I boot that nPar? in my mind, you have to build an nPar to create vPar later, so to me the answer is yes, how about yours?
when replacing a HUCB, UGUY should take down from it, I did this job before, led to nPar configuration lost(though it was not hard to retried cause it was an one nPar superdome)
2, again in my mind, that nPar's boot disk should not be the same of those vPars, am I wrong? please explain this to me.

regards
Stephen

stephen peng
Valued Contributor

Re: vPars in nPar, partition configuration lost concerning.

it is a PA-RISC superdome!
Torsten.
Acclaimed Contributor

Re: vPars in nPar, partition configuration lost concerning.

Normally the nPar boot disk is the same as the first vPar boot disk - same system, more resources in nPar mode.

You just need to boot "vmunix" instead of "vpmon" from ISL.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
stephen peng
Valued Contributor

Re: vPars in nPar, partition configuration lost concerning.

Steven,
>>The npar is normally configured to start up a system running vpmon, which starts up the vpar monitor.
I read from manual that system with vPars startup vpmon with "hpux /stand/vpmon", would this mean that the nPar also startup its os?


regards
Stephen
stephen peng
Valued Contributor

Re: vPars in nPar, partition configuration lost concerning.

>>they are playing musical document locations.
agree with it very much!
stephen peng
Valued Contributor

Re: vPars in nPar, partition configuration lost concerning.

>>You just need to boot "vmunix" instead of "vpmon" from ISL.
this completely get rid of one of my question!

regards
Stephen
stephen peng
Valued Contributor

Re: vPars in nPar, partition configuration lost concerning.

why I concerned about nPar configuration lost was that if the first vPar contained two CPU from seperate CELLs and nPar lost its configuation, the nPar could only boot from monarch CELL so the vPar was not able to boot. am I wrong with it?

regards
Stephen
Pete Randall
Outstanding Contributor

Re: vPars in nPar, partition configuration lost concerning.

>>I read from manual that system with vPars startup vpmon with "hpux /stand/vpmon", would this mean that the nPar also startup its os?

hpux is the "secondary system loader (SSL) utility for bootstrap" and, as such, it loads whatever it is told. You can have it load the VPAR monitor (vpmon) or you can have it load the hpux kernel.


Pete

Pete
Steven E. Protter
Exalted Contributor
Solution

Re: vPars in nPar, partition configuration lost concerning.

Shalom again,

PSB


2. again in my mind, that nPar's boot disk should not be the same of those vPars, am I wrong? please explain this to me.

Same disk. You can boot in npar mode or vpar mode, but you use the same disk either way.

Changing modes requires a lengthy reboot on a superdome. If you want some assistance offline, see my ITRC profile.

SEP
Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
Torsten.
Acclaimed Contributor

Re: vPars in nPar, partition configuration lost concerning.

The difference between booting nPars or vPars on a HP9000 is, if vpmon is booted, then you are in vPars mode.


Normally when you build a vPar environment, you install an OS on a nPar, define the vPars, boot the vpmon, then the vPars.

While doing this, the first installed OS (on nPar) is usually used for the first vPar.


But you can also define totally different vPars by not using the initial boot disk. This is up to you.

You can also boot any of the existing vPars boot disks in nPar mode - no problem.




But remember, all this is slightly different on a Integrity superdome, but totally different on a superdome 2.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
stephen peng
Valued Contributor

Re: vPars in nPar, partition configuration lost concerning.

I've got what I need in this thread!
thank you all!

regards
Stephen