On 04/01/2011 05:32 PM, Jerry Geis wrote: > dmesg is not reporting any issues. > > The /proc/mdstat looks fine. > md0 : active raid1 sdb1[1] sda1[0] > X blocks [2/2] [UU] > > however /var/log/messages says: > > smartd[3392] Device /dev/sda 20 offline uncorrectable sectors > > The machine is running fine.. raid array looks good - what > is up with smartd? > > THanks, > > Jerry This means that you will be in trouble sooner or later. Is there only sda1 on sda? If so, try mdadm /dev/md0 --fail /dev/sda1 mdadm /dev/md0 --remove /dev/sda1 mdadm /dev/md0 --add /dev/sda1 which will end up overwriting the offline uncorrectable sectors. In most cases this fixes the disk. But you will have to monitor it carefully from now on. HTH, Kay