Hi,

One of the reasons writes are slow in UNRAID when not using a cache pool is the parity calculation done each time we write.. Is there a way to do that work later like every two hours or something where Unraid would keep track of what was written and calculate the parity at a later time? Or is the use of cache drives the only way to achieve faster writes?

No.

If you enable reconstruct writes then parity isn't a slowdown as long as there is no other array activity.

But using cache is Unraid's solution, you write there and then have it moved to array later when practical.

You could also use mergerfs which works this way but obviously it has drawbacks too, there's a plugin for it.

Edited February 15Feb 15 by Kilrah