You can modify a storage policy to replace an existing rule set with a new rule set.

Prerequisites
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Verify that you are connected to a vCenter Server system.

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Verify that you have Profile-driven storage update privileges.

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Verify that a storage provider is registered with the vCenter Server system.

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Verify that a storage policy named pol-tag exists in the vCenter Server environment.

Procedure
1

Get the pol-tag storage policy and store it in the $policy variable. 

$policy = Get-SpbmStoragePolicy -Name 'pol-tag'
2

Create a new rule and store it in the $newRule variable. 

$newRule = New-SpbmRule -Capability (Get-SpbmCapability -Name 'VSAN.hostFailuresToTolerate') -Value 1
3

Create a new rule set by using the $newRule rule and store it in the $newRuleset variable. 

$newRuleset = New-SpbmRuleSet -AllOfRules $newRule
4

Modify the $policy storage policy by replacing the existing rule set with the newly created $newRuleset rule set. 

$modPolicy = Set-SpbmStoragePolicy -StoragePolicy $policy -AnyOfRuleSets $newRuleset