Lun CanonicalName and display Name

[vin01]

Hi

Why I am not able to write any output. I know there are two luns which are not roundrobin but not writing any output.

foreach($VMhost in Get-VMHost "Esxi1"){
foreach($lun in (Get-VMHostHba -VMHost $VMhost -Type FibreChannel |Get-ScsiLun -LunType disk |where {$_.Multipathpolicy -ne "RoundRobin"})){
foreach($ds in (Get-Datastore -VMHost $VMhost)){
$ds.ExtensionData.Info.Vmfs.Extent | %{ if($_.diskName -eq $lun.CanonicalName){
""|Select @{N="Cluster";E={$VMhost.Parent.Name}},
@{N="VMhost";E={$VMhost.Name}},
@{N="DatastoreName";E={$ds.Name}},
@{N="CanonicalName";E={$lun.CanonicalName}},
@{N="PathPolicy";E={$lun.MultipathPolicy}}                       
}
}
}        
}
}

[LucD]

Did you try leaving out the Where-clause, and including the Multipathpolicy as a property on the Select-Object?

Does that list those LUNs, with the assumed Path Policy?

foreach($VMhost in Get-VMHost "Esx*"){ 

    foreach($lun in (Get-VMHostHba -VMHost $VMhost -Type FibreChannel |Get-ScsiLun -LunType disk)){ 

        foreach($ds in (Get-Datastore -VMHost $VMhost)){ 

            $ds.ExtensionData.Info.Vmfs.Extent | %{

                if($_.diskName -eq $lun.CanonicalName){ 

                    ""|Select @{N="Cluster";E={$VMhost.Parent.Name}}, 

                        @{N="VMhost";E={$VMhost.Name}}, 

                        @{N="DatastoreName";E={$ds.Name}}, 

                        @{N="CanonicalName";E={$lun.CanonicalName}},

                        @{N='MultiPathPolicy';E={$lun.MultiPathPolicy}}                  

                } 

            } 

        }         

    } 

}  

[vin01]

I tried leaving where-clause here I can able to view the output of all the luns except the luns which are using path policy as most recently.

Where I need to do select-object?

If I try like this

Get-VMHostHba -VMHost $vmhost -Type FibreChannel |Get-ScsiLun -LunType disk |where {$_.Multipathpolicy -ne "RoundRobin"}

Output:

[LucD]

The MultiPathPolicy property is already in the output (last column).

Looks like those LUN are not using RoundRobin, but MostRecentlyUsed.

[vin01]

Yes LucD. But when I execute below script on the same host its not showing any output.

foreach($VMhost in Get-VMHost ){
foreach($lun in (Get-VMHostHba -VMHost $VMhost -Type FibreChannel |Get-ScsiLun -LunType disk |where {$_.Multipathpolicy -ne "RoundRobin"})){
foreach($ds in (Get-Datastore -VMHost $VMhost)){
$ds.ExtensionData.Info.Vmfs.Extent | %{ if($_.diskName -eq $lun.CanonicalName){
""|Select @{N="Cluster";E={$VMhost.Parent.Name}},
@{N="VMhost";E={$VMhost.Name}},
@{N="DatastoreName";E={$ds.Name}},
@{N="CanonicalName";E={$lun.CanonicalName}},
@{N="PathPolicy";E={$lun.MultipathPolicy}}                       
}
}
}        
}
}

[LucD]

That could only mean that the LUNs which do not have RoundRobin are not used in any of the datastores.

Can you check that?

[vin01]

So you mean to say this lun is mapped to the host but not in use right?

But that is not visible even while adding the datastore.

Should i need to check something else?

[LucD · Accepted solution]

Can you run the following, and compare the two resulting lists based on the CanonicalName?

Are the LUNs with the MostRecentlyUsed policy appearing in any of the datastores?

Get-Datastore |

Select Name,@{N='LUN';E={$_.ExtensionData.Info.Vmfs.Extent.DiskName -join '|'}}

Get-VMHostHba -Type FibreChannel | Get-ScsiLun -LunType disk |

Select CanonicalName,MultiPathPolicy

[vin01]

Yes those two naa id are not reported when I executed get-datastore.

[LucD]

Ok, then it looks normal that you don't see them in your script at the top.

The LUNs will pass your Where-clause, but then, since they are not used in datastore, they will not pass that test.

[vin01]

Yes. I am sorry killing your time.

[LucD]

No problem, you're welcome :smileygrin: