Yes I agree.  Its shared binaries used to apply maintenance.  We don't want it 
this way that is why we are trying to figure out why the linux os can't mount 
them r/o.  The only way we can get it to work is link the disk mw then turn 
around and mount them r/o on the linux os.  That is the only way the linux OS 
can mount them r/o.

To make things even weirder, I can use another RHEL5 server and link it r/o and 
mount the file system r/o on the same RHEL6 server.  Make me think there is 
something different in the RHEL5 server and not the RHEL6 server, but I can't 
see it.

Thanks
Scott


-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Scott 
Rohling
Sent: Sunday, November 16, 2014 10:56 PM
To: [email protected]
Subject: Re: device-mapper: reload ioctl on failed

Hmm.. what's providing the sharing of the underlying filesystem?    LINK MW
allows more then one guest to link read/write...   when you attach, then
it's not a minidisk any more, and only the guest that attached it can use
it.     MW usually isn't recommended unless there is some kind of
reserve/release to ensure only one guest writes at a time..  (MWV provides
virtual reserve/release for fullpack minidisks).   What's running on these
guests (middleware/application) and using these disks?  What you're showing 
looks dangerous..

Scott Rohling

On Sun, Nov 16, 2014 at 3:50 PM, Shumate, Scott <[email protected]>
wrote:

> It's a shared mini-disk.
>
> LINK LXD20069 0707 0707 MW
> LINK LXD20069 0708 0708 MW
> LINK LXD20069 0709 0709 MW
> LINK LXD20069 070A 070A MW
>
> Sorry for the confusion.
>
> Thanks
> Scott
>
>
> -----Original Message-----
> From: Linux on 390 Port [mailto:[email protected]] On Behalf Of
> Scott Rohling
> Sent: Friday, November 14, 2014 10:55 AM
> To: [email protected]
> Subject: Re: device-mapper: reload ioctl on failed
>
> Need to reword after 'It works if...'     not sure what you are saying..
>   are these fullpack minidisks?   Did you have them linked as MW or MWV
> before?   ATTACH doesn't allow multiwrite...   It is no longer a minidisk
> available to the system because the volume is attached to your guest.
>
> But please re - explain --   :-)    A directory entry showing the MDISKs
> might help too..  i'm not clear on your disk setup..
>
> Scott Rohling
>
> On Fri, Nov 14, 2014 at 7:46 AM, Shumate, Scott <[email protected]>
> wrote:
>
> > We have it in the new servers.  I have another interesting fact.  It
> > works if I attach the mini-disk was multi-write.  This is not what
> > we want but it works.  Any ideas?
> >
> > Thanks
> > Scott
> >
> >
> > -----Original Message-----
> > From: Linux on 390 Port [mailto:[email protected]] On Behalf
> > Of Agblad Tore
> > Sent: Friday, November 14, 2014 3:48 AM
> > To: [email protected]
> > Subject: Re: device-mapper: reload ioctl on failed
> >
> > You might have mismatch in zipl.conf,  missing some disks that is
> > used by root lvm.
> > All disks used in a lvm for / must be specified in zipl.conf.
> > I spent some hours finding that error.
> >
> > BR /Tore Agblad  Volvo IT
> >
> > -----Original Message-----
> > From: Linux on 390 Port [mailto:[email protected]] On Behalf
> > Of Shumate, Scott
> > Sent: den 14 november 2014 3:53
> > To: [email protected]
> > Subject: Re: device-mapper: reload ioctl on failed
> >
> > More errors:
> >
> > device-mapper: table: 253:18: linear: dm-linear: Device lookup
> > failed
> > device-mapper: ioctl: error adding target to table
> > device-mapper: table: 253:19: linear: dm-linear: Device lookup
> > failed
> > device-mapper: ioctl: error adding target to table
> > device-mapper: table: 253:1: linear: dm-linear: Device lookup failed
> > device-mapper: ioctl: error adding target to table
> > device-mapper: table: 253:2: linear: dm-linear: Device lookup failed
> > device-mapper: ioctl: error adding target to table
> >
> > Thanks
> > Scott
> >
> > -----Original Message-----
> > From: Linux on 390 Port [mailto:[email protected]] On Behalf
> > Of Dan Horák
> > Sent: Thursday, November 13, 2014 11:43 AM
> > To: [email protected]
> > Subject: Re: device-mapper: reload ioctl on failed
> >
> > On Thu, 13 Nov 2014 15:58:42 +0000
> > "Pavelka, Tomas" <[email protected]> wrote:
> >
> > > > lvm2-2.02.100-8.el6.s390x
> > >
> > > When I was dealing with this I had a version that had the bug
> > > fixed and I think it was older than 2.02.100. It was 2.02.9x
> > > something. I would guess that your problem is LVM related but not
> > > the same that I had. Red Hat would give you better advice than I do.
> >
> > yes, Scott, please open a support request, the support guys will ask
> > for sosreport and I think appending a strace output for the lvchange
> > call would be also helpful
> >
> >
> >                 Dan
> >
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