PowerCLI command for VMware SRM to disover Replicated LUNs using " Storage.DiscoverDevices() " is not working as expected

Hi,

I am creating Automation scripts for our SRA. I am trying to do with Power CLI commands, using trying to manage SRM. Installed vCenter Power CLI 11.2. using powerCLI,

i am able to connect SRM servers, but discoverdevices() is failing. as per syntax arguments are not required. but the command failed as expecting some arguments.

below are process steps followed.

Appreciate your help to resolve

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PS C:\Users\Administrator> Connect-VIServer -server xxxx1202.sss.ccc.com -username Administrator@vsphere.local -password xxxxxxxx12#

Name Port User ---- ---- ---- xxxx1202.sss.ccc.com 443 VSPHERE.LOCAL\Administrator

PS C:\Users\Administrator> $srmConn=Connect-SrmServer -user Administrator@vsphere.local -password xxxxxxxx12# -RemoteUser Administrator@vsphere.local -RemotePassword xxxxxxxx12# -IgnoreCertificateErrors

PS C:\Users\Administrator> $srmapi=$srmConn.ExtensionData

PS C:\Users\Administrator> $srmapi.Storage.DiscoverDevices()

Exception calling "DiscoverDevices" with "0" argument(s): "The request refers to an unexpected or unknown type."

At line:1 char:1 + $srmapi.Storage.DiscoverDevices() + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : VimException

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Thanks

Noorullah