On 03/02/2020 01:08 AM, Chris Murphy wrote: > smart also reports for /de/sdc > > 40 53 00 ff ff ff 0f Error: UNC at LBA = 0x0fffffff = 268435455 > > > So I'm suspicious of timeout mismatch as well. > https://raid.wiki.kernel.org/index.php/Timeout_Mismatch > > > Chris Murphy > The strace between the virtualbox host and guess show and number of I/O waits that would seem to fit some timeout issue like that. But according to the page, both drives in this array provide: SCT capabilities: (0x1085) SCT Status supported. Which should be able to handle the correction without stumbling into the timeout problem. Something is FUBAR. On a Archlinux guest running on that array, At a text console when you type your user name and press [Enter], the login may timeout before the password: prompt is ever displayed. So this is really giving virtualbox fits. On the host itself, you don't really notice much, other than a bit of slowdown with readline and tab-completion every once in a while, but apps looking to that array -- all bets are off. And still not a single error in the journal or mailed from mdadm. You would think if it was going to take 26 days to scrub a 3T array, some error should pop up somewhere :-) -- David C. Rankin, J.D.,P.E.