Any comments?
Please help.
Regards,
Pradipmaya.
On Fri, Feb 29, 2008 at 12:34 PM, Pradipmaya Maharana
<pradipmaya@xxxxxxxxx> wrote:
> Hey Chandra,
>
> It's RHEL 5.1.
> [root@localhost test]# uname -a
> Linux localhost.localdomain 2.6.18-53.el5xen #1 SMP Wed Oct 10
> 16:48:44 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
>
> Yes, it can see the 2 devices.
> [root@localhost test]# cat /proc/partitions
> major minor #blocks name
> 8 0 34603520 sda
> 8 1 104391 sda1
> 8 2 34491555 sda2
> 8 16 34603520 sdb
> 253 0 32440320 dm-0
> 253 1 2031616 dm-1
>
> mkinitrd does not return any message.
> [root@localhost ~]# mkinitrd /boot/initrd.final.2.img 2.6.18-53.el5xen
> --with=dm-multipath
> [root@localhost ~]#
>
> Here is what I did:
> [root@localhost test]# cpio -i < initrd.final.2.img
> 15587 blocks
> [root@localhost test]# ls
> bin dev etc init initrd.final.2.img lib proc sbin sys sysroot
> [root@localhost test]# ls lib/
> dm-mirror.ko ext3.ko ohci-hcd.ko
> dm-mod.ko firmware/ scsi_mod.ko
> dm-multipath.ko jbd.ko scsi_transport_sas.ko
> dm-snapshot.ko mptbase.ko sd_mod.ko
> dm-zero.ko mptsas.ko uhci-hcd.ko
> ehci-hcd.ko mptscsih.ko usb-storage.ko
>
> Attached is the init file for your reference.
>
> Here is the blacklist section from /etc/multipath
>
> blacklist {
> devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
> devnode "^(hd|xvd)[a-z][[0-9]*]"
> devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"
> }
>
> Thanks and Regards,
> Pradipmaya.
>
> On Thu, Feb 28, 2008 at 4:15 PM, Chandra Seetharaman
>
> <sekharan@xxxxxxxxxx> wrote:
> > 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@xxxxxxxxxx> wrote:
> > > > On Thu, 2008-02-28 at 12:11 -0800, malahal@xxxxxxxxxx wrote:
> > > > > Pradipmaya Maharana [pradipmaya@xxxxxxxxx] 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.
> > > > >
> > > > > --
> > > > > dm-devel mailing list
> > > > > dm-devel@xxxxxxxxxx
> > > > > https://www.redhat.com/mailman/listinfo/dm-devel
> > > > --
> > > >
> > > > ----------------------------------------------------------------------
> > > > Chandra Seetharaman | Be careful what you choose....
> > > > - sekharan@xxxxxxxxxx | .......you may get it.
> > > > ----------------------------------------------------------------------
> > > >
> > > >
> > > >
> > > > --
> > > > dm-devel mailing list
> > > > dm-devel@xxxxxxxxxx
> > > > https://www.redhat.com/mailman/listinfo/dm-devel
> > > >
> > --
> >
> >
> >
> > ----------------------------------------------------------------------
> > Chandra Seetharaman | Be careful what you choose....
> > - sekharan@xxxxxxxxxx | .......you may get it.
> > ----------------------------------------------------------------------
> >
> >
> >
>
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