Hi Tao Thank you for your reply. On 06.07.19 06:49, Hou Tao wrote: > "not clean" means the resync has not been completed yet. Is the array still "not clean" in the previous boot/reboot or not ? > If it is only "not clean" in the reproduced boot, that may mean the final update of MD super block is lost and the lagging > behind of the events in bitmap super-block will be possible. The array is in a clean state before the reboot. > Is the RAID array (md0) used as rootfs or other fs ? And how do you reproduce the problem ? Just rebooting continuously > until the problem reoccurs ? And not suddenly power-cut ? Its not in use as root-fs, the array is mounted as /home/ dir. I never tried to reboot until the problem occured again, just continuous more or less daily usage (as workstation) All reboots were clean reboots without power-cuts. -- regards mathias