[dm-devel] boot from san & lvm
Urs Golla
urs.golla at gmail.com
Mon Jan 7 15:36:21 UTC 2008
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/.*/" ]"
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:
mpath0 () dm-0 EMC,SYMMETRIX
[size=17G][features=0][hwhandler=0]
\_ round-robin 0 [prio=9][active]
\_ 2:0:0:67 sda 8:0 [active][ready]
\_ 2:0:0:33795 sdc 8:32 [active][ready]
\_ 2:0:0:33811 sdd 8:48 [active][ready]
\_ 2:0:0:37891 sde 8:64 [active][ready]
\_ 2:0:0:37907 sdf 8:80 [active][ready]
\_ 2:0:0:41987 sdg 8:96 [active][ready]
\_ 2:0:0:42003 sdh 8:112 [active][ready]
\_ 2:0:0:46083 sdi 8:128 [active][ready]
\_ 2:0:0:46099 sdj 8:144 [active][ready]
Any help would be most welcome!
cheers
Urs
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