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тАО03-04-2011 06:32 AM
тАО03-04-2011 06:32 AM
-inex
Solved! Go to Solution.
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тАО03-04-2011 06:52 AM
тАО03-04-2011 06:52 AM
SolutionMRU is intended for active/passive arrays.
The EVA4400 is an (asymmetric) Active/Active array for which you should use RR (Round Robin).
RR (as well as MRU) are ALUA-aware (Asymmetric Logical Unit Access) which means they will talk to the controller which is owning the virtual disk.
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тАО03-04-2011 07:13 AM
тАО03-04-2011 07:13 AM
Re: EVA4400 and ESX 4.1 mru failover
-inex
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тАО03-04-2011 07:17 AM
тАО03-04-2011 07:17 AM
Re: EVA4400 and ESX 4.1 mru failover
The EVA does an implicit ownership transfer of a virtual disk if it detects that the majority of traffic goes through the other controller for about an hour.
With RR in ESX you should be able to force the ownership back to the intended controller using Command View-EVA. The ESX server should notice it after a short time and switch its active I/O paths to that controller.
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тАО03-04-2011 07:21 AM
тАО03-04-2011 07:21 AM
Re: EVA4400 and ESX 4.1 mru failover
I wanted the luns to fail back automatically. Maybe fixed path is the only way to do this.
-inex
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тАО03-04-2011 08:31 AM
тАО03-04-2011 08:31 AM
Re: EVA4400 and ESX 4.1 mru failover
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тАО03-05-2011 06:35 AM
тАО03-05-2011 06:35 AM
Re: EVA4400 and ESX 4.1 mru failover
Under cv for each lun from the presentation tab you can set failover/failback (def is no preference) which should help.
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тАО03-05-2011 06:36 AM
тАО03-05-2011 06:36 AM
Re: EVA4400 and ESX 4.1 mru failover
Sorry ignore last!
Just read your post again and you have it already!!
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тАО03-05-2011 06:42 AM
тАО03-05-2011 06:42 AM
Re: EVA4400 and ESX 4.1 mru failover
-inex
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тАО03-06-2011 07:33 PM
тАО03-06-2011 07:33 PM
Re: EVA4400 and ESX 4.1 mru failover
Also, I would like to highlight that Round-Robin settings for ALUA compliance array (EVA4400) and OS (ESZX4.x) will allow hosts to send IOs to all ports (FP1 & FP2) of owning controller only. MRU settings will send the IO to only one port on the owning controller (either FP1 or FP2). You best choice for load-balancing is to use Round-Robin in conjunction with preferred Vdisk path settings.