Windows Server · Risk: High · Documentation Verified
Last verified: 2026-10-26
Microsoft StorageQoS reference: Creates a Storage QoS policy. The syntax and selected example below are adapted from the pinned Windows Server 2025 reference. Module availability, target configuration and delegated permissions determine whether it can run in your environment. Documentation and parameter text: Microsoft, CC BY 4.0; formatting adapted by Cmdlet World. No execution testing is claimed.
Use an account with the target resource permissions documented for New-StorageQosPolicy. Modifying administrative cmdlets may require elevation or delegated administration. This catalog does not assert that ordinary users can execute the command.
Supported environments
Windows / StorageQoS · Windows Server 2025 documentation; feature/module prerequisites apply
Parameters
-AsJob
Runs the cmdlet as a background job. Use this parameter to run commands that take a long time to complete.
-CimSession
Runs the cmdlet in a remote session or on a remote computer. Enter a computer name or a session object, such as the output of a New-CimSession or Get-CimSession cmdlet. The default is the current session on the local computer.
-Confirm
Prompts you for confirmation before running the cmdlet.
-MaximumIOBandwidth
Specifies the bandwidth limit for the policy, in bytes per seconds.
-MaximumIops
Specifies the throughput limit for the policy, in units of 8KB-normalized Input/Output Operations Per Second (IOPS). Storage usage is measured in normalized IOPS. This is a count of the storage input/output operations per second. Any IO that is 8KB or smaller is considered as one normalized IOPS. Any IO that is larger than 8KB is treated as multiple normalized IOPS. For example, a 256KB request is treated as 32 normalized IOPS.
-MinimumIops
Specifies the throughput reservation for the policy, in 8KB-normalized IOPS.
-Name
Specifies the name of the policy to create.
-ParentPolicy
Specifies the parent policy of the policy that this cmdlet creates. The object must specify the PolicyId field.
-Policy (required)
Specifies the storage QoS Policy that this cmdlet creates in the policy manager. Must be a valid MSFT_StorageQoSPolicy instance that specifies MaximumIops and MinimumIops.
-PolicyId
Specifies the GUID of the policy that this cmdlet creates.
-PolicyType
Specifies the type of the policy that this cmdlet creates. The acceptable values for this parameter are: Aggregated and Dedicated. In an aggregated policy, the maximum and minimum throughputs apply to the aggregate throughput of all initiators. In a dedicated policy, the minimum and maximum throughputs apply to each initiator individually.
-ThrottleLimit
Specifies the maximum number of concurrent operations that can be established to run the cmdlet. If this parameter is omitted or a value of 0 is entered, then Windows PowerShell® calculates an optimum throttle limit for the cmdlet based on the number of CIM cmdlets that are running on the computer. The throttle limit applies only to the current cmdlet, not to the session or to the computer.
-WhatIf
Shows what would happen if the cmdlet runs. The cmdlet is not run.
Prerequisites
Windows with the StorageQoS module and the Windows feature or management tools that provide it. Confirm target connectivity and version compatibility using the linked Microsoft reference.
Security considerations
This cmdlet changes system state. Review every target and parameter in the official reference, test outside production, and prepare an appropriate backup or rollback. Do not execute the example automatically.
This command creates a policy with a maximum of 100 8KB-normalized IOPS and a minimum of 10. Source: Microsoft, CC BY 4.0; transcript prompt/output removed. This example was not executed.