Thanks, to everyone for their responses.
I hope the procedure can be made alot simpler if I was to use zipl.conf
and the dasd=nnnn-nnnn parm.
Does anyone know if that would make the change easier??
or
Does anyone know, if with SLES10, this procedure is different and/or
easier??
Also, does my SLES8 scenario look OK?
Thanks,
Dave
>>
>>
>>
We have three LPARs running Linux.
You should be able to use the install CDs as a rescue system to fix up
the initrd and do a zipl. (I actually define a virtual machine under
zVM, and use the install CDs under zVM, but I have performed the
procedure in LPAR mode before we had zVM.) You access your newly
restored drives. Mount the filesystems. chroot into the newly mounted
filesystems. Do a mkinitrd. Do a zipl. Exit from the chroot. Unmount
all the filesystems. Start up Yast install process. Abort yast install
process. Then end the install program.
More details
0. Migrate your system.
1. Boot the install CDs like you are going to perform an install.
2. Putty into system
3. Load the dasd device driver
modprobe dasd_eckd_mod
4. Vary the dasd devices online
dasd_configure 0.0.0100 1 0
The 0100 is the device address. The 1 says vary online
Repeat for each drive.
(You could use yast to do this by going far enough into
the install to activate the drives.)
5. Verify that you have them all online
cat /proc/dasd/devices
6 We have use lvm, so we have to load the lvm drivers
modprobe dm-mod
modprobe reiserfs
/sbin/devmap_mknod.sh
7. Activate the volume groups.
vgscan
vgchange -a y
8. Mount all your filesystems.
Our procedures mount them to /mnt
9. chroot into the newly mounted filesystems
chroot /mnt
At this point, it is as if you are running off the
migrated drives.
Now you can do a mkinitrd and a zipl. This
will cause the proper drives to be varied on
at IPL.
It may be necessary to fix up fstab depending
on how your mounts are done.
10.Once you are ready, then you can exit out of
chroot
exit
11. Unmount the filesystems
umount -a
12. Shutdown lvm
vgchange -a n
13. Start the yast installer.
yast
14. Go far enough into it to abort the install.
15. Answer the prompts from the installer to "power off" the lpar.
This procedure originated with SLES9. There may be other ways to do
this with SLES10.
As I said earlier, sometimes I create a virtual machine under zVM and
dedicate the LPARS
drives to it. This allows me to use the install CDs under under zVM to
access a system that
is not any shape to boot.
Hope this helps,
Ron
Lee Stewart wrote:
> Hi all,
>
> We are migrating Linux CKD DASD to a new DS8100. We have two
> bare-metal (LPAR) linux server's running. (no z/VM).
> One is SLES8 and one is SLES10.
>
> For the SLES8, I plan to:
>
> 1. vi /etc/zipl.conf and change the DASD= to the new devices
> 2. zipl
> 3. mkinitrd
> 4. shutdown
> 5. migrate dasd
> 6. startup sles8 server
>
> (Does that look OK?)
>
>
> But for the SLES10 system, we are not using DASD= in zipl.conf
> How do I make the device numbering changes for SLES10 ?
> (I know that I can still use zipl.conf dasd= and I think it will use
> that...but not sure if that's the recommended way)...
Sirius Computer Solutions, an IBM Premier Business PartnerDave Myers |
Senior Systems Engineer | 303.996.7125 | Cell: 303.619.0782 |
E-mail: [EMAIL PROTECTED]
Fax: 303.706.1713
zSeries IBM Certified SpecialistVisit our customer site at
www.mysiriuszone.com
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