On 03/21/2017 11:31 AM, Wols Lists wrote: > On 21/03/17 14:26, David Brown wrote: >> It is possible that if there are a large number of UREs from a >> drive, that the RAID system will consider the whole drive bad and >> drop it. But other than that, UREs will be treated independently. > > Doesn't mdadm have a setting that does exactly that? Too many UREs > and the drive gets dropped? I'm sure I've come across that > interfering with rebuilds. Yes. MD maintains a per-member-device counter of read errors and drops the device when the counter reaches 20 (twenty). The counter is decremented by 10 (ten) once an hour. A short burst of less than 20 read errors will be tolerated, as long as they don't continue at more than 10/hour. Last I checked, this behavior is hard-coded. Phil -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
