[linux-lvm] multipath question
vu at sivell.com
Thu Mar 19 19:00:25 UTC 2009
I set up multipath on /dev/sda and /dev/sdb which are mapped from a
remote single disk, which has two partitions.
Below are some output.
[root at vm5 mpath]# ls -l
lrwxrwxrwx 1 root root 7 Mar 19 10:34 mpath0 -> ../dm-2
lrwxrwxrwx 1 root root 7 Mar 19 10:34 mpath0p1 -> ../dm-3
lrwxrwxrwx 1 root root 7 Mar 19 10:34 mpath0p2 -> ../dm-4
[root at vm5 mpath]# multipath -ll
mpath0 (16465616462656166313a3100000000000000000000000000) dm-2
\_ round-robin 0 [prio=0][active]
\_ 0:0:0:1 sda 8:0 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 1:0:0:1 sdb 8:16 [active][ready]
[root at vm5 mpath]#
From the multipath command, I know dm-2 is mapped from two devices
/dev/sda and /dev/sdb as expected.
But how can I know if dm-3 is mapped from /dev/sda1 and /dev/sdb1, and
dm-4 from /dev/sda2 and /dev/sdb2 ?
The command "multipath -ll" only gives info on mpath0 or dm-2.
I tried multipath -ll /dev/mpath/mpath0p1 but does not show anything.
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