Boot from SAN system shows mismatch of WWIDs in Red Hat Enterprise Linux 5
Issue
-
A system has inconsistent multipath user_friendly_names between reboots.
-
A system booting from SAN is showing mismatching WWIDs. The output of the command
multipath -lland the entries in/etc/multipath/bindingsfile shows mismatching WWIDs:
#cat /etc/multipath/bindings:
mpath19 360060e80164c920000014c92000008e3
mpath20 360060e80164c920000014c92000008e4
mpath21 360060e80164c920000014c9200000f00
# multipath -ll
mpath19 (360060e80164c920000014c92000008e4) dm-16 HP,OPEN-V
[size=28G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 1:0:4:19 sdap 66:144 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 0:0:4:19 sdt 65:48 [active][ready]
mpath20 (360060e80164c920000014c9200000f00) dm-17 HP,OPEN-V
[size=55G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 1:0:4:20 sdaq 66:160 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 0:0:4:20 sdu 65:64 [active][ready]
mpath21 (360060e80164c920000014c92000008d3) dm-21 HP,OPEN-V-CM
[size=201M][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 1:0:4:192 sdar 66:176 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 0:0:4:192 sdv 65:80 [active][ready]
- Every time a new disk is added the same problem appears.
- A system with root (/) on a multipath device shows the incorrect device/wwid mapping in
multipath -ll
Environment
- Red Hat Enterprise Linux (RHEL) 5
device-mapper-multipath/file system resides on a multipath map
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