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Loop Switch Resilience

 
Schwarzie
Frequent Advisor

Loop Switch Resilience

Theoretical question for someone ....
 
EVA 8000 in a 2C 12D configuration.  2 loop switches that connect all drive enclosures in the lower half of the cabinet die/go offline. The 2 remaining loop switches that connect the top half remain operational throughout.
 
Say that the EVA is fully populated and split down the middle equally into 2 Disk Groups.
 
What would happen to the VDisks, data traffic and host connectivity?
 
Thanks for any input given.
4 REPLIES 4
Torsten.
Acclaimed Contributor

Re: Loop Switch Resilience

A failure of 2 switches would be very unlikely, but fatal.


Split the disk groups into the upper and lower area would be a bad design, because of RSS group layout.


Hope this helps!
Regards
Torsten.

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Schwarzie
Frequent Advisor

Re: Loop Switch Resilience

Completely agree. However, the two disk groups are split with a virticle line. ie DiskGroup1 is made up of  bay's 1 to 7 and DiskGroup2 is made up from bay's 8 to 14.

 

Is the outcome still the same?

Torsten.
Acclaimed Contributor

Re: Loop Switch Resilience

If you would loose both lower switches for any reason, you loose half of the disks - this would be fatal.

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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No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
Schwarzie
Frequent Advisor

Re: Loop Switch Resilience

Thanks for your input.