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тАО05-04-2011 05:28 AM
тАО05-04-2011 05:28 AM
MSA1500 Controller
Supported Redundancy Mode: Active/Standby Asym-Active/Active
Current Redundancy Mode: Asym-Active/Active.
but only one controller showing activity and second controller show on only Active LED on LED number "7".
is ther any problem in MSA controller or FW issue.
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тАО05-04-2011 06:12 AM
тАО05-04-2011 06:12 AM
Re: MSA1500 Controller
Maybe your hosts are so smart (have the ALUA sensing MPIO/multipating software) that they only speak to the owning controller?
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тАО05-04-2011 06:35 AM
тАО05-04-2011 06:35 AM
Re: MSA1500 Controller
On active/active 1 controller owns a LUN and does the work, but the controller can own another LUN and do the work for this LUN.
Since passing over the data from the standby to the owner, the data should only be handled by the LUN owner (this is what you see).
But now it is a bit more complicated, since the disks are single pathed, the controllers have to "somehow" share the internal busses anyway.
Hope this helps!
Regards
Torsten.
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тАО05-04-2011 06:38 AM
тАО05-04-2011 06:38 AM
Re: MSA1500 Controller
On active/active 1 controller owns a LUN and does the work, but the other controller can own another LUN and do the work for this LUN.
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
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тАО05-04-2011 12:38 PM
тАО05-04-2011 12:38 PM
Re: MSA1500 Controller
my all LUN Preferred Path is : "Controller 1"
possible to change LUN Preferred Path...
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тАО05-05-2011 01:36 AM
тАО05-05-2011 01:36 AM
Re: MSA1500 Controller
"Auto is the default setting for new configurations. In this case, the storage system automatically selects the I/O path from the redundant controller to the logical drive and dynamically load balances all paths."
But you can also set it manually to controller 1 or 2.
Hope this helps!
Regards
Torsten.
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тАО05-05-2011 01:44 AM
тАО05-05-2011 01:44 AM
Re: MSA1500 Controller
and then what operating system and version is running on the hosts, because that defines how the multipath environment must be configured. The MSA might do 'automatic' round-robin assignment of logical disk ownership, but it can do ownership transfers like the EVA if too much host I/O goes through the non-owning controller.
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тАО05-05-2011 02:16 AM
тАО05-05-2011 02:16 AM