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Go Back   Linux Archive > Redhat > Device-mapper Development

 
 
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Old 09-14-2011, 09:58 AM
NEVEU Stephane
 
Default multipathd & EMC Clariion CX-4

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******************************************* *** "*"


****************************** path_grouping_policy** group_by_prio


****************************** getuid_callout*********
"/lib/udev/scsi_id -g -u -d /dev/%n"


****************************** prio_callout ********************* "/sbin/mpath_prio_emc
/dev/%n"


****************************** hardware_handler******** "1
emc"


****************************** features "1
queue_if_no_path"


#**************************** failback******************************* 15


#**************************** rr_weight************************** priorities


****************************** no_path_retry**************** 300


****************************** path_checker****************** emc_clarion


****************************** failback******************************* immediate


#**************************** rr_min_io************************** 100


****************************** product_blacklist*********** LUN_Z


*************** }


}


*


multipaths {


*


*************** multipath {


****************************** wwid*********************************** 360060160174026008cf8cef961cde011


****************************** alias************************************* NPCD


*************** }


*


*************** multipath {


*************** wwid*******************
36006016017402600f2ed610b62cde011


*************** alias****************** NDO


******* }


***************


*************** multipath {


*************** wwid***************** **360060160174026000c984cc67acde011


*************** alias****************** NAGIOS


******* }


*


*


}


*


And here is the result of a multipath -ll :


*


sdg: checker msg is "directio checker reports path is
down"


sdm: checker msg is "directio checker reports path is
down"


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][faulty]


*\_ 5:0:1:1 sdm 8:192 [active][faulty]


sde: checker msg is "directio checker reports path is
down"


sdk: checker msg is "directio checker reports path is
down"


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][faulty]


*\_ 5:0:0:2 sdk 8:160 [active][faulty]


sdc: checker msg is "directio checker reports path is
down"


sdi: checker msg is "directio checker reports path is
down"


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][faulty]


*\_ 5:0:0:0 sdi 8:128 [active][faulty]


*


*


So when trying to write on a virtual device
/dev/mapper/NAGIOS (for exemple) I see many I/O errors on 'faulty disks'. When
tresspassing LUNs on the clariion, I see ready disks becoming faulty and faulty
ones becoming ready ... I also have udevd (udev-work) burning my CPUs while
trying to rename '/dev/disk/by-id/wwn-0xetcetc...udev-tmp'


What's wrong with my config ? Am I missing something ?


Thx by advance for your help,


Regards,


*






Cordialement,


*






--


Stéphane Neveu


Ingénieur Opensource / RedHat
Technical Manager


THALES - Critical Information
Systems


DIVISION Security Solutions
& Services / Server Mgmt


Tél 01 73 17 03 15


--


*







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