[dm-devel] EMC CX LUN problem

[Brian Wong]

On Tue, 2006-01-24 at 22:31 +0100, Nicola Murino wrote:
> Hi,
> 
> I'm trying to configure a new emc cx storage, I have the following:
> 
> 2 server, each server has a qla2462 dual port hba
> each qla2462 is connected to a switch (only one switch)
> 1 emc cx storage with 4 path connected to the switch
> 
> I defined two lun on the storage however I'm able to see only one LUN
> 
> multipath -l show the following:
> 
> multipath -l
> mail (36006016086f01600e46f567adb8cda11)
> [size=150 GB][features="1 queue_if_no_path"][hwhandler="1 emc"]
> \_ round-robin 0 [active]
>  \_ 1:0:1:0 sdd 8:48  [active][ready]
>  \_ 1:0:1:1 sde 8:64  [active][ready]
>  \_ 2:0:1:0 sdh 8:112 [active][ready]
>  \_ 2:0:1:1 sdi 8:128 [active][ready]
> \_ round-robin 0 [enabled]
>  \_ 2:0:0:0 sdf 8:80  [active][ready]
>  \_ 1:0:0:0 sdb 8:16  [active][ready]
>  \_ 1:0:0:1 sdc 8:32  [active][ready]
>  \_ 2:0:0:1 sdg 8:96  [active][ready]
> 

i could be off in the weeds here, but this output looks wrong.  the
host:channel:target:lun numbers listed there suggest your cx is indeed
surfacing luns 0 and 1, but multipath is grouping them under a single
target ID.

i think emc engineers monitor this list; perhaps they can help.

also, look at this if you havent already (there's a section on clariion
cx's), and feel free to add your findings.

http://christophe.varoqui.free.fr/wiki/wakka.php?wiki=TestedEnvironments

hope that helps,

brian