I know I could test it, but, transfering 100GB worth of data takes awhile and I don't really feel like it. Does anyone know what happens if:-

Min. free space specifies the minimum amount of free space that must exist on the Cache disk in order for the user share file system to create objects on the Cache disk. If there is less than this amount of free space then the object will be created on the array instead.

 

I set that to 15GB, the cache drive as 10GB left and I attempt to create a file on a cache only share? Will it fail or will it write? I understand that shares that use the cache (but aren't dedicated to it) would write directly to the array at this point, but, I'm questioning a cache only share.

Interesting question that I don't have any experience with. I would guess it would do the same as if you wrote directly to any other disk and ran out of space. Where is it supposed to put the overflow?

Interesting question that I don't have any experience with. I would guess it would do the same as if you wrote directly to any other disk and ran out of space. Where is it supposed to put the overflow?

Dunno if the question was rhetorical or not, but unraid never splits files. It either all fits on the destination or it doesn't. That's not an issue if the file is declared as the full final size when the copy starts, but it can be a big issue if the file is allocated small and grown in place.

Interesting question that I don't have any experience with. I would guess it would do the same as if you wrote directly to any other disk and ran out of space. Where is it supposed to put the overflow?

 

What I mean is, there's still space on the cache drive for the file, it's just that the cache drive is past it's "minimum free space" and the share is "Cache only". What will it do? Reject the file or apply it to the cache drive.

My guess is that it would fail. I doubt the min free space considers that it's a cache only share. So, it would rule out the cache drive and not find another suitable location.