Hello, On Fri, Oct 21, 2022 at 10:15:42AM +0200, Pascal Hambourg wrote: > Le 21/10/2022 à 02:14, Andy Smith a écrit : > > Perhaps you could use dm-dust to make an unreliable block device > > from a real device? > > That seems uselessly complicated to me. Well I too do not understand why OP can't just fail one existing device, but it seemed important to them to experience actual errors and have it kicked out for that. A half way measure might be the offline / delete poking I mentioned in /sys/block. *shrug* Cheers, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting