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Microsoft MPIO shows incorrect number of paths for luns

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Category:
fas-systems
Specialty:
san
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Applies to

  • Hyper V
  • ONTAP 9 onwards
  • MPIO
  • SAN

Issue

Some of the luns show odd number paths, instead if even paths from the host side:
 
Example:
LUN Properties
| Read(MB)|Wrap(KB)|Written(MB)|Wrap(KB)|IoErrors| #Reads|#Wrap|#Writes|#Wrap|PathFail|
| 15| 0| 7| 0| 0| 2280| 0| 1069| 0| 0|
LoadBalancePolicy Round Robin with Subset
NumberPaths 7
Paths:
|SLUA| ALUA|FP|OP|PW|Pref|Prim|
| 0|Impl-Only| 0| 1| 0| 0| 1|
| 0|Impl-Only| 0| 1| 0| 0| 1|
| 0|Impl-Only| 0| 1| 0| 0| 1|
| 0|Impl-Only| 0| 1| 0| 0| 1|
| 0|Impl-Only| 0| 0| 0| 0| 1|
| 0|Impl-Only| 0| 0| 0| 0| 1|
| 0|Impl-Only| 0| 0| 0| 0| 1|

 

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