On 23/03/2020 18:13, Roger Heflin wrote:
Those default timeouts are usually at least 30 seconds, but in the past the scsi subsystem did some retrying internally. The timeout needs to be higher than the length of time the disk could take. Non-enterprise, non-raid disks generally have this timeout set 60-120 seconds hence MD waiting to see if the failure is a sector read failure (will be a no-response until the disk timeout) or a complete disk failure (no response ever).
https://raid.wiki.kernel.org/index.php/Timeout_Mismatch The whole website is reasonably up-to-date, so it's worth a read. Cheers, Wol
