On 11/03/19 12:31, Nix wrote: > On 10 Mar 2019, Wols Lists uttered the following: > >> > I'd like to modify the raid layer such that it times out quickly, and >> > recalculates and rewrites the data after a few seconds, such that these >> > drives cease to be a problem, but stick that on the long list of raid >> > papercuts I'd like to sort out when I can find the time to learn to >> > program the raid subsystem! > I don't see how that could work. When these drives get stuck on lengthy > retries, they are essentially unresponsive: So any code needs to take that in to account. Pain in the arse, but when the linux read times out, the re-write code needs to detect that the drive is one of these cheapos, and spawn a thread that waits for the drive time-out before rewriting it. Of course, that's going to cause a host of other issues that will need sorting/fixing :-) - the obvious one is what happens if something else re-writes that block in the middle of the time-out period ... Cheers, Wol
