If what you are attempting to do is a DR test, then on your DR hardware you
need to boot the install/recovery system (from an IPL tape or from the CD
image using the HMC), and mount your dasd images on that system, at say
/mnt, then do a chroot /mnt and you can then edit/twiddle/alter your system
information and re-ipl. The advantage to an IPL tape is that you could
include in the IPL image on that tape a few more utilities than the
install/recovery CD image has. The disadvantage is that you have to create
and maintain that tape.
As to how to create that tape, I'm not certain. I've always used the
install/recovery CD (for SuSE 7.2, use the patch CD, as the 7.2 install CD
kernel has issues with 3390-9 devices)
If anyone can elucidate the procedure necessary to create an IPL tape from
the install/recovery CD's, and how to IPL from that tape, I think a few of
us would be more than grateful.
To those on the list following this: Assuming that I'm correct in the
above statements, and he is trying to IPL a disaster recovery system for
Linux, what would be the files that would need adjustment to deal with
potential hardware address changes for dasd, network and/or other address
dependent devices?
|---------+---------------------------->
| | Daniel Jarboe |
| | <[EMAIL PROTECTED]|
| | stserv.com> |
| | Sent by: Linux on|
| | 390 Port |
| | <[EMAIL PROTECTED]|
| | IST.EDU> |
| | |
| | |
| | 06/20/2003 06:25 |
| | AM |
| | Please respond to|
| | Linux on 390 Port|
| | |
|---------+---------------------------->
>------------------------------------------------------------------------------------------------------------------------------|
|
|
| To: [EMAIL PROTECTED]
|
| cc:
|
| Subject: Re: Linux D/R with different units
|
>------------------------------------------------------------------------------------------------------------------------------|
> Sorry my error. I should have said "how can I boot from
> 1116" - and I am
> thinking about disaster / recovery where I have restored onto
> unit 1116 and
> I cannot have already done a zipl because (in my hypothetical
> scenario) my
> system is currently down.
Well, in that case is 1116 available to the LPAR? You are shutting down
your image, backing it up and restoring to 1116, then bringing up your
original and having 1116 be iplable too? Then when you bring back up
the original image, you can echo "add device range=1116"
>>/proc/dasd/devices, mount and chroot to the path of the mounted device
1116, modify its zipl.conf to use the new addresses as needed, and run
zipl. Then exit the chroot and umount the device. Now either address
is iplable, just change it in the LPAR's activation profile.
If you instead want to ipl the new mirror before you bring it down and
backup/restore, do the zipl to point to the new address before you
backup/restore, ipl the new one, then mount the old one and zipl it kind
of like the reverse of what I just described.
If what you actually want is to bring down the image, backup/restore and
be able to immediately ipl from two addresses with identical copies of
the same data, I'm not aware of any way to do this. You'll need to
mount the other dasd and run a zipl for it.
~ Daniel
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