Microsoft21H1 is a great release with many improvements. The good side and bad side is issues more and more affect many releases across releases, in special when using the same Core OS such as 1903 / 1909 or 2004 / 20H2, 21H2.
This also has a good side effect because the issues are more consistent in home or business environment that naturally aren't 100% running the same builds.
heads-up for PowerUsers or those that are running a Microsoft lab at home (likely using MS tech as a baseline)
:warning:Please be cautious to with 1903, 1909, 2004, 20H2, 21H2 when using Storage Spaces with ReFS formatted drives in the pool. Try to avoid running Defrag Optimization or to cause a "Storage pool full state"
Affected build (tested 02-2021)
Windows Server, version xxxx (SAC), Windows 10 Pro, Windows 10 Enterprise
Windows Insider Beta (21H2)
Not affected:
Windows Server 2019 LTSC 1809 17763.x
Windows 10 Insider Dev since b19628
Windows Server 2022 LTSC Preview 21H2
Here is my original feedback https://aka.ms/AAbfubr
The first issue reports dated back 6-8 months before 1903 release but unfortunately cannot find it.
Original issue deleting files on ReFS does not free up space on a Storage Spaces Pool
https://aka.ms/AAbfubr (my feedback, which initiated the fix in Insider Dev)
other examples: https://aka.ms/AA93gzs, https://aka.ms/AA93h1d
factually related issue with Defrag Optimizing
Defrag bloating up space on optimizing or fail to optimize due to low space and this behaviour
other references:
Storage Spaces pool does not reclaim free space from deleted files (microsoft.com)
Windows 10 2004: Storage Spaces issues | Born's Tech and Windows World (borncity.com)
