Do you have the mdisk device number specified with (ro) after it in your
kernel parms?  This is necessary, as well as having it read-only in the CP
directory for the guest.  (That makes a total of 3 different places it needs
to be specified.)

Is the "owning" Linux guest up and running?  If so, that's a no-no.  That
means the file system is dirty, and not consistent to the other guests
sharing the file system.  More than likely your system is trying to replay
the journal, and failing, due to the read-only status.

Since having the owning system up and running is a no-no, using any of the
journaling file systems is pretty pointless.  You use journaling file
systems so that if a system crashes for whatever reason, the file systems
that are mounted read-write can be recovered quickly using the journal.
File systems that are mounted read-only by definition are in a consistent
state, so no journals are needed.

I would recommend using ext2 in all these cases.  Just remember that any and
_all_ systems that have the file system mounted must have it read-only.


Mark Post

-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Dave
MYERS
Sent: Wednesday, May 19, 2004 7:53 PM
To: [EMAIL PROTECTED]
Subject: Having problems sharing RO /usr /usr/src and /opt under zVM


Need to check to see if I am doing something fundamentally wrong with
sharing EXT3 filesystems in MDISKS under zVM.

I am linking to a good install of SuSE SLES8 (which is in a linux guest)
from another linux guest.

I am linking readonly  to the MDISKs that holds  /usr   /usr/src and  /opt.

I am mounting in /etc/fstab as RO for these 3 filesystems

The /usr and /opt are behaving and seem to be working.

The /usr/src is not working.  Spitting out lots of ugly sense codes...

I removed the /usr/src entry from the fstab and I can come up.

Then I tried mounting the /usr/src and got ugly msgs, but it did mount and I
was able to get into the filesystem...although it spit out those ugly msgs
every time  ;o)

What am I doing wrong ??
How can I fix it??


Tia
Dave Myers
Denver Solutions Group
Senior Systems Engineer
Office Phone:�� (303) 996-7112
Cellular Phone: (303) 619-0782
Home Office:��� (303) 948-0027
Fax:����������������� (303) 706.1713
e-mail: [EMAIL PROTECTED]
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