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Unraid Cache speed Q: What if the 2 devices in the cache pool are dissimilar?

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I.e., if I have an SSD of 120GB and a hard drive of 120GB, will the pool operate at the speed of the slower device or will it write to the SSD then finish the write to the hard drive later?

 

I'd like redundancy on the cheap. :) It's not a ton of data at the moment so it's not going to flood the hard drive in reality.

 

Use case: I have a 120GB SSD and several 320GB WD Green drives I could throw in to mirror that. Although, yes, I should just buy a cheap SSD and probably will, this is a bit academic.

 

But it could come into play, say, if I wanted to save a little and had a 512GB NVME mirrored by a 1TB drive.

 

Edited by RealActorRob

  • Community Expert
1 minute ago, RealActorRob said:

will the pool operate at the speed of the slower device

This.

  • Author
37 minutes ago, JorgeB said:

This.

Bummer. I suppose there's a way to autosync the files but it wouldn't be quite the same...

 

  • Community Expert

You could have a script running hourly/daily syncs using rsync or incremental btrfs snapshots.

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