[dm-devel] EMC CX LUN problem

[Nicola Murino]

Brian Wong ha scritto:
> 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.
>
>   
Maybe you are right! I added another LUN and this is multipath output

multipath -l
mail (36006016086f01600e46f567adb8cda11)
[size=150 GB][features="1 queue_if_no_path"][hwhandler="1 emc"]
\_ round-robin 0 [active]
 \_ 2:0:0:0 sdh 8:112 [active][ready]
 \_ 1:0:0:0 sdb 8:16  [active][ready]
 \_ 1:0:0:1 sdc 8:32  [active][ready]
 \_ 1:0:0:2 sdd 8:48  [active][ready]
 \_ 2:0:0:1 sdi 8:128 [active][ready]
 \_ 2:0:0:2 sdj 8:144 [active][ready]
\_ round-robin 0 [enabled]
 \_ 1:0:1:0 sde 8:64  [active][ready]
 \_ 1:0:1:1 sdf 8:80  [active][ready]
 \_ 1:0:1:2 sdg 8:96  [active][ready]
 \_ 2:0:1:0 sdk 8:160 [active][ready]
 \_ 2:0:1:1 sdl 8:176 [active][ready]
 \_ 2:0:1:2 sdm 8:192 [active][ready]


> i think emc engineers monitor this list; perhaps they can help.
>   
maybe the problem is scsi_id that report the same output for all block 
device,

I have kernel 2.6.16-rc1 on a server and 2.6.13.5 on the other one,

with 2.6.16-rc1

lsmod
Module                  Size  Used by
dm_round_robin          3840  1
dm_emc                  5760  1
dm_multipath           18696  3 dm_round_robin,dm_emc
qla2400               200448  0
qla2xxx               116964  25 qla2400

with 2.6.13.5


root at server1:/home/admin# lsmod
Module                  Size  Used by
ehci_hcd               29576  0
uhci_hcd               30864  0
usbcore               104828  3 ehci_hcd,uhci_hcd
dm_round_robin          3712  1
dm_emc                  5632  1
dm_multipath           18312  3 dm_round_robin,dm_emc
qla2xxx               110044  12
firmware_class          8448  1 qla2xxx


hba controller are qlogic2462

thanks
Nicola



> 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
>
>
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