[dm-devel] Installing RHEL with single controller
Chandra Seetharaman
sekharan at us.ibm.com
Fri Feb 29 00:15:55 UTC 2008
On Thu, 2008-02-28 at 15:07 -0800, Pradipmaya Maharana wrote:
> Ok; this is what I did:
>
> mkinitrd /boot/initrd.final.img 2.6.18-53.el5xen --with=dm-multipath
>
> Changed the /boot/grub/menu.lst file to point to new initrd image file.
> Reboot is fine but multipath -ll is still null. :(
>
> What am I missing here.
That is odd!!
What version of RHEL do you have ?
Do you see 2 scsi devices (sda and sdb) for the same lun when your
system is up ?
Can you send the o/p of mkinitrd.
Can you extract the file "init" from your initrd image and send it.
Can you check if the device is blacklisted in your multipath.conf file ?
>
> Regards,
> Pradipmaya.
>
>
> On Thu, Feb 28, 2008 at 1:36 PM, Chandra Seetharaman
> <sekharan at us.ibm.com> wrote:
> > On Thu, 2008-02-28 at 12:11 -0800, malahal at us.ibm.com wrote:
> > > Pradipmaya Maharana [pradipmaya at gmail.com] wrote:
> > > > Multipath is getting loaded, if that is what you are wondering about.
> > > > After reboot I check for multipathd status, and smod for the modules
> > > > loaded, everything looks fine.
> > >
> > > No, I am asking if initrd image contains multipath commands. You need to
> > > use cpio to extract the initrd image and see the source code to check
> > > it!
> > >
> > > multipath has to be loaded and *run* before mounting your real root. If
> > > it gets loaded after mounting your real root, it is too late to have
> > > multipath on root disk! Looks like you need to regenerate initrd with
> > > multpath support.
> >
> > Yes, Malahal is right. You need to create initrd with multipath tools.
> > You can do this by running mkinitrd with "--with=dm-multipath"
> > (Follow the SLES10 installation instructions in my documentation
> > http://sources.redhat.com/lvm2/wiki/MultipathUsageGuide )
> >
> >
> > > --Malahal.
> > >
> > > --
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> > > dm-devel at redhat.com
> > > https://www.redhat.com/mailman/listinfo/dm-devel
> > --
> >
> > ----------------------------------------------------------------------
> > Chandra Seetharaman | Be careful what you choose....
> > - sekharan at us.ibm.com | .......you may get it.
> > ----------------------------------------------------------------------
> >
> >
> >
> > --
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> > dm-devel at redhat.com
> > https://www.redhat.com/mailman/listinfo/dm-devel
> >
--
----------------------------------------------------------------------
Chandra Seetharaman | Be careful what you choose....
- sekharan at us.ibm.com | .......you may get it.
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