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Mirrored Drive on Desktop: Windows Storage Spaces vs. Dynamic Disk?

Jan 28, 2021
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I have a couple of 3.0TB WD Red drives that came out of array that was upgraded in a NAS. I thought it would be a decent idea to replace my 1.5TB HD in my desktop that is my D: drive and holds all my documents, downloads, and misc storage. I Never used either of these technologies but from what I understand of them either one would work but which one would be better or neither?

Oh, I'm running Windows 10 Pro if it matters.


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What's your existing 1.5tb drive? The reds are a bit slower, because they're a Network storage drive, but they're not a bad choice, esp if you need the room, or the 1.5 is substantially older...
Jan 28, 2021
439 (1.41/day)
Its an older Hitachi drive. It probably is faster, but doesn't really matter to me though as its only going to serve up documents ("My Documents" is mapped to the D: drive), pictures, downloads, and just general temp storage.

I found this MS article; Recovering a Mirrored Volume, its older but I'm assuming its still relevant.
Last edited:


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Jan 28, 2021
439 (1.41/day)
It sounds like Dynamic Disk is what I want then. Just as simple as possible mirrored storage.

Storage Spaces has slightly higher performance, but recovery is MUCH more complicated than Dynamic Disk.
When you say Storage Spaces has higher performance I would assume thats in cases where you using several drives to form one larger pool and not simply mirroring two identical drives? Also recovery in terms of when the system hosting the pool dies, kinda like when you run hardware RAID and the controller dies?
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I would be inclined to use Storage spaces simply because dynamic disks are apparently deprecated by Microsoft.

Dynamic disks also are proprietary partition types so wont be readable in non Windows OS, and even in some WinPE media e.g. Macrium rescue media cannot read them.

Although the above document states its still supported in one single configuration which is a mirror boot configuration.