On 02/09/2018 09:29 PM, Marc MERLIN wrote: ... > > myth:~# badblocks -fsvnb512 /dev/sdh 1287409599 1287409400 > /dev/sdh is apparently in use by the system; badblocks forced anyway. > Checking for bad blocks in non-destructive read-write mode badblocks gives a warning that /dev/sdh is in use. You should not use it that way (needing the -f option), because essentially you are messing with the drive behind md's back. Remove /dev/sdh from the array before you use badblocks, or hdparm, or dd or the like on a member device. Kay -- 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