On Sat, 28 Jan 2017 18:29:32 -0500 George Rapp <george.rapp@xxxxxxxxx> wrote: > Attempting to re-add /dev/sdg4 to the array fails on a busy device: > > # mdadm --manage /dev/md4 --re-add /dev/sdg4 > mdadm: Cannot open /dev/sdg4: Device or resource busy You need to remove it first mdadm --remove /dev/md4 /dev/sdg4 or mdadm --remove /dev/md4 faulty But honestly I am not sure if simply removing and re-adding will bring your reshape back to its working order at this point. Also you should figure out why did it fail in the first place. Check SMART, check dmesg further back rather than a few lines only. Maybe the disk needs a replacement, not just a blind re-add. -- With respect, Roman -- 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
