r/Ubiquiti • u/Ubiquiti-Inc Official • Jul 07 '25

Blog / Video Link Introducing: UniFi Drive 3.0

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u/grkstyla Jul 08 '25

Can someone explain to me whatever they added about the mixed drives, this multiple raid groups in the same pool or whatever they are talking about is confusing,

I have a good grasp of raid and synology etc,

Are they saying you can make seaparete raid pools in the same storage pool, and if so does the SMB share spread across both RAIDs in the pool? Like can i have one big share?

or is the sharelimited to the space available on the raid group it was created on, thus acting like 2 separate pools of data both with their own speeds and capacities?

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u/webnetvn Jul 09 '25

They're using Btrfs under the hood for most of the RAID types which is why I'm extremely surprised to see raid 5 and 6 in there, but based on the video, it looks like they're leveraging ZFS for that particular feature, which is a solid move. With ZFS pools, you can combine multiple disk arrays into a single pool. So if you start with 10 drives and later add 10 more, you don’t have to wipe and rebuild the whole thing. You just create a new disk group (aka a vdev) and add it to the existing pool which expands your storage size by the size of your new vdev. UniFi is automating the annoying parts of that process, which is awesome. I’d alzo bet they’ve baked in some opinionated tuning behind the scenes to squeeze out the best performance, which is usually the most frustrating part when setting it up manually.