Now There’s a Problem with Storage Spaces

Posted on June 17, 2020 by Paul Thurrott in Windows 10X with 35 Comments

The rollout of Windows 10 version 2004 was expected to go smoothly, but that hasn’t happened. Now there’s a new problem.

“Devices using Storage Spaces might have issues using or accessing their Storage Spaces after updating to Windows 10 version 2004 ([with] the May 2020 Update) and Windows Server version 2004,” a new Microsoft support document notes. “When using some configurations, partition for Storage Spaces might show as RAW in Disk Manager.”

In addition to recommending that users do not run the chkdsk command on any device affected by this issue, Microsoft has provided the following workaround:

“There is currently no workaround for this issue.”


Instead, Microsoft says that you can “prevent issues with the data on your Storage Spaces” by using the following instructions to mark them as read-only, presumably temporarily:

  1. Select Start and type: powershell
  2. Right-click or long-press on Windows PowerShell and select Run as administrator.
  3. If prompted by a User Access Control dialog for Windows Powershell, select yes.
  4. Within the PowerShell dialog, type the following command and press enter: get-virtualdisk | ? WriteCacheSize -gt 0 | get-disk | set-disk -IsReadOnly $true
  5. Your Storage Spaces should now be set to read-only, meaning you will not be able to write to them. Your device will still be usable, and any volume not seen as RAW should be readable.

Microsoft says it is “currently investigating this issue and will provide an update when more information is available.”


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