How does the multipath group the disks ?. What could be the reason newly added LUN adds additional path to the existing mpath devices instead of creating new mpath devices ?
Issue
- After adding New luns, new paths get added to the existing mpath devices instead of paths to a new mpath devices
Before adding New Lun :
[root@test ~]# multipath -ll
36005076802898138f40000000000000e dm-2 IBM,2145
[size=30G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 1:0:0:1 sdb 8:16 [active][undef]
\_ round-robin 0 [prio=0][enabled]
\_ 0:0:0:1 sda 8:0 [active][undef]
[root@test ~]#
After adding New Lun:
[root@gest]# multipath -ll
36005076802898138f40000000000000e dm-2 IBM,2145
[size=30G] [features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=0][enabled]
\_ 1:0:0:1 sdb 8:16 [active][undef]
\_ 1:0:0:2 sdd 8:48 [active][undef]
\_ round-robin 0 [prio=0][enabled]
\_ 0:0:0:1 sda 8:0 [active][undef]
\_ 0:0:0:2 sdc 8:32 [active][undef]
[root@test]#
Environment
- Red Hat Enterprise Linux
- device-mapper-multipath
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