I have setup multipathing on rhel4 u3 x86_64 like
this:
There are two paths to the disk, sda and sde
# multipath -v2 -l
mpath0 (3600805f300176640a435a927359c0003)
[size=440 GB][features="0"][hwhandler="0"]
\_ round-robin 0 [enabled]
\_ 0:0:0:1 sda 8:0 [active][ready]
\_ 2:0:0:1 sde 8:64 [active][ready]
I need help in the following:
1. How to disable a particular path lets say sda.
I tried to blacklist sda by putting the entry in
/etc/multipath.conf:
devnode_blacklist {
devnode "sda"
}
But on running multipath, it gives a segmentation
fault
# multipath
Segmentation fault
strace shows that it faults immediately after close()
open("/var/lib/multipath/bindings", O_RDWR|O_CREAT,
0600) = 11
----------<snip>----------
close(11) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
2. How to correlate /dev/dm- entries to the disks, how
to find which device /dev/dm-10 is mapped to
-lnx
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