Re: boot from san & lvm

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Hi

Thank you for your reply!

Using "mapper" instead of mpath did it!

hm... i think the partition (mpath0p1) is just "/boot" and mpath0p2 is
the rest. this would mean, everything is ok now?

cheers



On 1/7/08, malahal@xxxxxxxxxx <malahal@xxxxxxxxxx> wrote:
> Urs Golla [urs.golla@xxxxxxxxx] wrote:
> > Hi
> >
> > I would like to boot RHEL5 from SAN. If I install with the "mpath"
> > parameter I can see the mapper/mpath0 device and the installation
> > completes without any errors.
> >
> > It boots from SAN and everything looks ok (well, lets say its
> > working). If i add this lines to /etc/lvm/lvm.conf
> >
> > types = [ "device-mapper", 1]
> > "filter = [ "a/dev/mpath/.*/", "r/.*/" ]"
>
> Try "mapper" instead of "mpath" above to handle partitions on your
> devices.
>
> > and remove the blacklist lines from /etc/multipath.conf as described
> > in the "Native Multipath Failover Based on DM-MPIO for v2.6.x Linux
> > Kernel and EMC(R) Storage Arrays" manual the pvscan command returns
> > with " No matching physical volumes found". Why?
> >
> > If I remove the filter line from lvm.conf the pvscan & pvdisplay
> > command returns:
> >
> > (...)
> > PV Name               /dev/mapper/mpath0p2
> > (...)
> >
> > Why is it using mpath0p2 and not mpath0? /dev/mapper/mpath0 does exist
> > and points to the right disks, because "multipath -ll" gives me
> > something like that:
>
> You must be having partitions on your disk (either you did or the
> installer did for you).
>
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