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Re: [dm-devel] multipathd & EMC Clariion CX-4



Hi all,

Actually it works on only one server (I'm actually running a cluster..), the second node is not showing anything when trying multipath -ll.
I tried to remove / reboot / reinstall multipath-tools but I still see this error message in dmesg :
device-mapper: ioctl: error adding target to table
device-mapper: table: 251:13: multipath: error getting table
.
.
.
many times.
There is no linked wwn created in /dev/mapper of course whereas everything's working find on the first node..
Any idea ?

Thank you by avance,


-----Message d'origine-----
De : dm-devel-bounces redhat com [mailto:dm-devel-bounces redhat com] De la part de NEVEU Stephane
Envoyé : mercredi 14 septembre 2011 14:00
À : device-mapper development
Objet : Re: [dm-devel] multipathd & EMC Clariion CX-4

Dear Hannes,

You are right ! many thanks ! I moved away multipath.conf from the etc folder and restarted multipath-tools and everything works fine :

NDO (36006016017402600f2ed610b62cde011) dm-8 DGC     ,RAID 5        
[size=50G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=2][active]
 \_ 2:0:0:1 sdd 8:48  [active][ready] 
 \_ 5:0:0:1 sdj 8:144 [active][ready] 
\_ round-robin 0 [prio=0][enabled]
 \_ 2:0:1:1 sdg 8:96  [active][ready] 
 \_ 5:0:1:1 sdm 8:192 [active][ready] 
NAGIOS (360060160174026000c984cc67acde011) dm-6 DGC     ,RAID 5        
[size=40G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=2][active]
 \_ 2:0:1:2 sdh 8:112 [active][ready] 
 \_ 5:0:1:2 sdn 8:208 [active][ready] 
\_ round-robin 0 [prio=0][enabled]
 \_ 2:0:0:2 sde 8:64  [active][ready] 
 \_ 5:0:0:2 sdk 8:160 [active][ready] 
NPCD (360060160174026008cf8cef961cde011) dm-7 DGC     ,RAID 5        
[size=100G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=2][active]
 \_ 2:0:1:0 sdf 8:80  [active][ready] 
 \_ 5:0:1:0 sdl 8:176 [active][ready] 
\_ round-robin 0 [prio=0][enabled]
 \_ 2:0:0:0 sdc 8:32  [active][ready] 
 \_ 5:0:0:0 sdi 8:128 [active][ready]

Does it automatically recognize symbolic links (pointing to /dev/dm-*) in /dev/mapper/ folder ? 

--
Stéphane Neveu
Ingénieur Opensource / RedHat Technical Manager
THALES - Critical Information Systems
DIVISION Security Solutions & Services / Server Mgmt
Tél 01 73 17 03 15
--


-----Message d'origine-----
De : dm-devel-bounces redhat com [mailto:dm-devel-bounces redhat com] De la part de Hannes Reinecke
Envoyé : mercredi 14 septembre 2011 13:40
À : device-mapper development
Objet : Re: [dm-devel] multipathd & EMC Clariion CX-4

On 09/14/2011 11:58 AM, NEVEU Stephane wrote:
> Hi all,
>
> I'm experiencing problems trying to set up a multipathd config with
> a EMC Clariion CX-4 Storage.
>
> It seems that the CX4 is actually active/passive regarding SPs. My
> server  has QLogic Fiber Cards. My multipath-tools version is 0.4.8.
>
> Here is my multipath.conf :
>
> ##
>
> ## This is a template multipath-tools configuration file
>
> ## Uncomment the lines relevent to your environment
>
> ##
>
> defaults {
>
>                  user_friendly_names   yes
>
> }
>
> blacklist {
>
>                  #devnode "*"
>
>                  devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
>
>                  devnode "^hd[a-z][[0-9]*]"
>
>                  devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"
>
> }
>
> devices {
>
>                  device {
>
>                                 vendor "DGC "
>
>                                 product "*"
>
That is wrong. The configuration file doesn't allow for regular 
expressions or wildcards. Please use the correct name ('RAID 5') here.
And 'directio' is most certainly wrong here.

What's wrong with the default setting? It should work out of the box 
without configuration file at all ...

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare suse de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)

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