Windows 10: Simple mirrored storage space slower than mirrored drive?

I am building a new PC that is both NVR and NAS and has two large 18TB drives. At the moment it has Windows 10pro but the reason for the rebuild is to upgrade to W11 its replacing a system that is not compatible. I created a simple mirrored volume and then deleted it and created a simple mirrored storage space. No turning or changes on each. I ran a simple benchmark over 32gb of the drive. Everything was defaults. The system was a Intel Core Ultra 7 265 on ASUS Z890-Creator MB with on-board SATA drives, with 128gb memory. But key to this is the hardware was identical for the two ru

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Simple Storage Space to Two-Way MIrroring possible?

I currently have a 4 drives setup as a Simple storage space. I recently got 4 more drives and I was wondering if I could enable two-way mirroring without having to reformat everything?

 

Win10 Storage Spaces - Mirrored Pool Doesn't Release Space

Using Storage Spaces for a simple Mirrored Pool with (2) 4TB HDD's for a backup drive.

Setup was simple and easy with Storage Spaces reporting a formatted 3.75TB Mirrored Volume.

After test writing some system images and doing some disk speeds tests, Storage Spaces says drives are over 80% full with a warning, but there isn't any kept data on there.

Under Computer Management, the Volume says only 15% used.

So it's like deleted files (also deleted from recycle bin) don't get reported as free space back to the Storage Space Console.

I have also created a SIMPLE storage space with (2) SSD's, but deleted files and space seems to be reclaimed there.

I have enabled Disk Optimizer to run once a week but it doesn't help to reclaim the space on the MIRRORED volume of HDD's.

 

Win10 Storage Spaces - Mirrored Pool Doesn't Release Space

Using Storage Spaces for a simple Mirrored Pool with (2) 4TB HDD's for a backup drive.

Setup was simple and easy with Storage Spaces reporting a formatted 3.75TB Mirrored Volume.

After test writing some system images and doing some disk speeds tests, Storage Spaces says drives are over 80% full with a warning, but there isn't any kept data on there.

Under Computer Management, the Volume says only 15% used.

So it's like deleted files (also deleted from recycle bin) don't get reported as free space back to the Storage Space Console.

I have also created a SIMPLE storage space with (2) SSD's, but deleted files and space seems to be reclaimed there.

I have enabled Disk Optimizer to run once a week but it doesn't help to reclaim the space on the MIRRORED volume of HDD's.