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тАО11-27-2008 08:24 AM
тАО11-27-2008 08:24 AM
EVA8100 Controlloer Failover
Controller B was rebooted and the all the LUNs failed over to Controller A and have remained on Controller A for a long time now. How can I get the LUNs configured to be on controller B back to controller B.
Thanks
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тАО11-27-2008 08:56 AM
тАО11-27-2008 08:56 AM
Re: EVA8100 Controlloer Failover
- More than 60% of the reads are coming from the non-owner controller
- You use MPIO DSM manager on the server to perform a manual failover
- You change the preferred controller in Command View
- The owner controller fails or it's rebooted
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тАО11-27-2008 09:00 AM
тАО11-27-2008 09:00 AM
Re: EVA8100 Controlloer Failover
You will need to use DSM Manager which integrates into the Microsoft Management Console this needs to be insatalled on each of your host that have multi-pathing software installed.
From within computer mangement there is a section under storge titled Hp MPIO DSM Manager highlight that section and then to the right there will be a list of luns assigned to that system, select the lun right click and a drop down list will be displayed giving various options on lun placement.
Or you could use HPDSM cli
Start - Programs - Hewlett-Packard - Eva -HPDSN Cli
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тАО11-27-2008 09:09 AM
тАО11-27-2008 09:09 AM
Re: EVA8100 Controlloer Failover
so all the paths are mastered by the controller A after the controller B reboot. At the same time the Set preferred path to the controller B reminded on some vdisks, but now the controller B is only the proxy controller. So you should wait for the hardcoded feature of the EVA controller, which automaticaly turns the heavily loaded proxy to the master controller...
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тАО11-27-2008 09:17 AM
тАО11-27-2008 09:17 AM
Re: EVA8100 Controlloer Failover
Thanks
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тАО11-27-2008 10:45 AM
тАО11-27-2008 10:45 AM
Re: EVA8100 Controlloer Failover
if you are using the host MPIO DSM ALB option and dynamic loadbalancing. Then the master controller is being chosen by the host multipathing software... then the set preferred path on EVA controllers should be set to NONE. (this should be the best config option and you dont need to bother with the static master controller mapping...
You can reconfigure your environment to this, but always check the performance after each change
But you probably dont use the ALB at the moment and you rely on the static loadbalancing setting on the EVA via the set preferred path evenly to both controllers to become masters....
Then my above statement is valid and you can check the paths correctnes via the hpdsm cli...
But as you have
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тАО12-04-2008 03:01 AM
тАО12-04-2008 03:01 AM
Re: EVA8100 Controlloer Failover
Thanks