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February 9th, 2010 02:00

powerpath

Dears,

In case of clariion, if either of SP fails, LUN tresspass would happen, thus all the paths will be active.  But, in case of DMX, if a front end port fails, would failover happen at multipath for related paths ?  OR the related paths will be dead until the fix and all i/o on the other active paths?

for an instance,

HBA 1 ---> FA 8A 0

HBA 2 ---> FA 9A 0   

LUN 001 is mapped to FA 8A 0 and 9A 0 and masked to both HBAs.  In case of 9A 0 fails, there will be a path fail over like both path access the LUN thru 8A 0

HBA 1 ---> FA 8A 0

HBA 2 ---> FA 8A 0

thanks

cheers

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20.4K Posts

February 9th, 2010 05:00

remember DMX3 is an active/active array, there is not trespassing going on like in Clariion. So if FA port 9A0 fails, your host will mark that path as dead and redirect i/o to port 8A0. Assuming you have 8A0 on one fabric and 9A0 on another fabric ..HBA2 would not even have access to that 8A0 FA.

1.3K Posts

February 9th, 2010 03:00

no
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