Disk Enclosures
cancel
Showing results for 
Search instead for 
Did you mean: 

Use of Preferred path with EVA 5000 VCS 3.x and MPIO 1.02 for Windows

AjayK
Occasional Contributor

Use of Preferred path with EVA 5000 VCS 3.x and MPIO 1.02 for Windows

Hi,

Can someone please confirm the recommended preferred path settings on the Vdisks on EVA 5k with VCS 3.110 and MPIO 1.02 in use on Windows?

Can you please forward any documents that provide these recommendations?

Thanks
A

4 REPLIES
IBaltay
Honored Contributor

Re: Use of Preferred path with EVA 5000 VCS 3.x and MPIO 1.02 for Windows

Hi,
the MPIO basic does not have any loadbalancing nor ALB, so the set preferred path should be set to controller a/controller b evenly on EVA side...

the pain is one part of the reality
AjayK
Occasional Contributor

Re: Use of Preferred path with EVA 5000 VCS 3.x and MPIO 1.02 for Windows

So its not advisable at all to use no-preference. Because my preferred path settings are not working as expecting and I/O is happening on managing controller rather than preferred paths.
IBaltay
Honored Contributor

Re: Use of Preferred path with EVA 5000 VCS 3.x and MPIO 1.02 for Windows

No,
via the EVA Command view Set preffered path the managing/master controller should be manually set to controller A or B. If you set NONE then it is possible that both controllers will not be nicely balalanced...
the pain is one part of the reality
Uwe Zessin
Honored Contributor

Re: Use of Preferred path with EVA 5000 VCS 3.x and MPIO 1.02 for Windows

Using no-preference, the EVA will round-robin assign the virtual disks to both controllers on startup. VCS V3.x is active/passive, so the basic MPIO will automatically go to the managing controller.

Of course, if you know the load on each vdisk, you can use manual path-A/B preference to do a better 'load balancing' of vdisks to both controllers.
.