RE: zipl does not pick up "new" disks

Florian's nailed this.  I keep forgetting that Red Hat (and now perhaps
SLES8) uses the initrd scheme where it loads modules with parms, including
the ones for DASD, then does a "root pivot" to make the real root file
system get mounted as "/".  The part you were missing was the "mkinitrd"
command to re-create the initrd, and that does indeed require
/etc/modules.conf to be updated with the correct device numbers.

Sorry for the misdirection.


Mark Post

-----Original Message-----
From: Bradley Schmidt [mailto:[email protected]]
Sent: Wednesday, October 15, 2003 11:42 AM
To: [email protected]
Subject: RE: zipl does not pick up "new" disks


/etc/modules.conf DID have (no quotes) "options dasd_mod
dasd=8000-8003,8fff".  We changed it to "options dasd_mod dasd=8000-8007"

We IPLed each time we made a change.  We've done "shutdown -r now" as well
as "shutdown -h now", then "#cp i 8000".

The parm file message is "Oct 15 07:30:37 lookin-thru-161 kernel: Kernel
command line: root=/dev/Volume00/LogVol00 dasd=8000-800F".

Device 8FFF is DETACHed.   Devices 8000-8007 are ATTACHed.

When we cat /proc/dasd/devices, we see:

8000(ECKD) at ( 94:  0) is dasda : active at blocksize: 4096, 601020 blocks,
2357 MB
8001(ECKD) at ( 94:  4) is dasdb active at blocksize: 4096, 601020 blocks,
2357 MB
8002(ECKD) at ( 94:  8) is dasdc: active at blocksize: 4096, 601020 blocks,
2357 MB
8003(ECKD) at ( 94: 12) is dasdd: active at blocksize: 4096, 601020 blocks,
2357 MB
8fff(none) at ( 94: 16) is dasde : unknown

Note there are no entries for 8004-8007, which are ATTACHed.

It looks like Linux is ignoring what is in /etc/modules.conf,
/etc/zipl.conf, and /boot/parmfile.1

So,,, what is it REALLY looking at?

Thanks.

>>> "Post, Mark K" <[email protected]> 10/15/03 07:49AM >>>
I don't think the change to modules.conf was necessary.  What did you put in
there?

Did you re-IPL after re-running zipl?  If so, what does Linux report for the
parmfile during the boot process (very near the beginning of the messages
coming out).


Mark Post

-----Original Message-----
From: Bradley Schmidt [mailto:[email protected]] 
Sent: Wednesday, October 15, 2003 10:41 AM
To: [email protected] 
Subject: zipl does not pick up "new" disks


We installed beta2 with disks 8000-8003, 8fff.  We're trying to change to
8000-8007

We've updated /etc/zipl.conf and /etc/modules.conf with the new devices.  We
ran zipl.  The /boot/parmfile.1 now correctly indicates dasd=8000-8007.

We note that the previous /boot/parmfile.1 did NOT have the
dasd=8000-8003,8fff parameter, but the /etc/modules.conf DID have the
parameter.  However, even after setting the files and running zipl, we are
still getting 8000-8003,8fff.

What else do we need to change?  Where is this information stored?


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