I'm guessing (and I do mean guessing) that your kernel got over-written by a
new one and/or the initrd wasn't re-created as it should have been, and/or
zipl wasn't re-run after it was all over.

IPL from your installation tape.
Insmod the dasd_mod module with your DASD device numbers (dasd=xxx,yyy,zzz)
Mount the file systems on those volumes
chroot to the mount point
cd /boot
look at what's there, see if it's new
re-run mkinitrd
re-run zipl
exit from the chroot
umount your DASD file systems
try to re-IPL


Mark Post

-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
conway, heather
Sent: Thursday, July 15, 2004 5:45 PM
To: [EMAIL PROTECTED]
Subject: Problem with S/390 & SuSE's Online Update


Hi All,
I am urgently hoping that you can help me out.  I am working with SLES 8 on
a z800 and attempted to perform an Online Update via YaST2 on the Linux LPAR
and now it no longer boots.

The config is as follows:
z800
LPAR allocated for the Linux partition
2 3390 CKD devices have been allocated for boot and swap

I successfully performed the installation to the LPAR and was running
v2.4.19-3suse-SMP kernel.  I then ran the Online Update via YaST2. The
Online Update required that the YOU RPM be updated first.  I updated this
RPM first, then logged out of YaST2 and logged back in. I then reran the
Online Update and updated the to v2.4.21-215 the other week and to
v2.4.21-231 today. In both cases, when I went back to the HMC and tried to
activate the LPAR, the Linux partition fails to boot.  The last time I ended
up starting from scratch and reinstalling....

The error reported is as follows:
Incorrect program status word loop
Hardware Messages --> Problem Analysis--> Problem Description: EAn error was
detected in partition <LINUX>.  Central processor (CP) 00 is looping due to
switching between program status words (PSWs) that are not valid.  The
program status word (PSW) is 0000000000000000.

How would you recommend that I fix this problem so that I don't have to
reinstall?   I had tried to use the installation CD to boot into the
existing installation, but it wasn't able to recover the installation....are
there certain steps I should follow?  If so, what are they? Thanks for your
help. Heather

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