WindowsToGo Performance Assessment

  • Article

This test validates that the USB storage device meets the performance requirements of Windows To Go. USB storage devices that do not support Windows To Go do not need to run this test. This test checks the following performance requirements:

  • Random 4 KB Write IOPs >= 2000 (rotational drives exempt)

  • Random 4 KB Read IOPS >= 2000 (rotational drives exempt)

  • Sequential Write Speed >= 80MB/s

  • Sequential Read Speed >= 80MB/s

  • Max I/O Latency < 250 milliseconds

  • Maximum of 10 seconds sum-total of user-perceivable I/O latencies over any 1 hour period of a user-representative workload, where a user-perceivable I/O is defined as having a latency of at least 100 milliseconds

Test details

   
Specifications
  • Device.Storage.Hd.WindowsToGoCapableUSBDrive.WindowsToGoCapableUSBDrive
Platforms
  • Windows 10, client editions (x86)
  • Windows 10, client editions (x64)
Supported Releases
  • Windows 10
  • Windows 10, version 1511
  • Windows 10, version 1607
  • Windows 10, version 1703
  • Windows 10, version 1709
  • Windows 10, version 1803
  • Windows 10, version 1809
  • Windows 10, version 1903
  • Next update to Windows 10
Expected run time (in minutes) 180
Category Benchmark
Timeout (in minutes) 10800
Requires reboot false
Requires special configuration false
Type automatic

 

Additional documentation

Tests in this feature area might have additional documentation, including prerequisites, setup, and troubleshooting information, that can be found in the following topic(s):

Running the test

Before you run the test, complete the test setup as described in the test requirements: Removable Storage Testing Prerequisites. In order for the device to indicate that it seeks Windows To Go certification it must implement the MS OS Descriptor extended property WindowsBootCapable per the WindowsToGoCapableUSBDrive requirement. If this descriptor is not set on the device then this test will not appear.

This test formats the device. Any data stored on it will be lost. Back up any important data before running the test.

Note

   You must insert the USB drive into a USB 3.0 port to run this test.

 

Troubleshooting

For generic troubleshooting of HLK test failures, see Troubleshooting Windows HLK Test Failures.

For troubleshooting information, see Troubleshooting Device.Storage Testing.

If you receive an error message saying "Not all of the metrics required were found in the logs", remove any unnecessary USB devices attached to the system, reboot, and then run the test again.

If a test case takes longer than 250 milliseconds, the device does not meet Windows To Go performance requirements. You can try to make the device faster and less prone to slow random access by using a different component or storage media.

The ReplyScenario test case files because too many IO operations had latencies in excess of 100 milliseconds. You can try to make the device faster and less prone to slow random access by using a different component or storage media.

More information

Command syntax

Command option Description

StorageParameters.exe /device "[WDKDeviceID]" /outscript "[ParameterScript]"

Runs the test.

 

File list

File Location

StorageParameters.exe

<testbinroot>\nttest\driverstest\storage\wdk\

StorageDevices.dll

<testbinroot>\nttest\driverstest\storage\wdk\

 

Parameters

Parameter name Parameter description
LLU_NetAccessOnly User account for accessing test fileshare.
LLU_LclAdminUsr User account for running the test.
DeviceID Either DriveLetter or DriveNumber
DeviceType USB3_PW_SSD or USB3_PW_RT
Protocol UAS or BOT
Usage Data or Boot
WDKDeviceID Instance path of device to test
QueryUAS Query Gatherer for UAS detection
QueryUFDRotationalMedia Query Gatherer for rotational media detection
Cooldown
ParameterScript
PolicyXml Defines tests and pass/fail criteria
TAEFSource