Under zVM, it's a command ("IPL 100"), that that's where the confusion occurs.
At the point where the install is done, the install kernel is booted from the
VM reader. The ONLY hint of where the target system will eventually IPL from
is where you tell kickstart to install the bootloader.
But as I said, that's not specified anywhere in the doc. If I were following
the logic rigidly, I might expect it to try to boot from the reader again, but
that's obviously wrong.
I never said it behaved improperly, it works as it should. It's just not
documented very well, I think we're agreed on that.
-----Original Message-----
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of John
Summerfield
Sent: Monday, June 15, 2009 1:06 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: [LINUX-390] To kick or to clone ... that is the question
Hall, Ken (GTS) wrote:
> Not the point. *I* know where it reboots from, I've tested it. The point
> was, it's not documented, along with a lot of other behaviors unique to the z
> platform.
>
> As I said, the kickstart doc is Intel-centric, and doesn't cover z very well.
> That makes it tricky to set up and maintain.
The docs are orientated towards intellish systems, true. Booting from
the default device is expected behaviour, and there has been much
discussion over the years about how to avoid install loops.
In the matter of which device a z system IPLs from, I have no experiece,
but when I last used a S/370, there was indeed a default IPL drive. We
set it with hex twist knobs. Facom systems I used were similar, except
it was done on a console, with a light pen.
>
> I notice no one ever responded on my issue about it prompting the console for
> confirmation when the disk has been formatted but not partitioned. I suppose
> I should open an issue for that, but it's not a big priority at the moment.
I thought Brad did.
>
> -----Original Message-----
> From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of John
> Summerfield
> Sent: Saturday, June 13, 2009 7:53 PM
> To: LINUX-390@VM.MARIST.EDU
> Subject: Re: [LINUX-390] To kick or to clone ... that is the question
>
> Hall, Ken (GTS) wrote:
>
>> "Reboot" triggers a reboot, but from where? I loaded the install kernel
>> from the VM reader, there's nothing there to reboot. I assume it goes
>> where it installed zipl, from the "bootloader" line, but it doesn't SAY
>> that.
>
> Where ever the system is set to boot from. On Intellish system, it's
> whatever the boot device is set is to.
>
> Except that, from what Brad said, it _might_ be different on z, not by
> design but by crude hack. Did he say, "it uses an IPL CCW?"
>
>
>
>
> --
>
> Cheers
> John
>
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