# # create a raid1 with a bitmap file # bmf=$targetdir/bitmap rm -f $bmf mdadm --create --run $md0 --level=6 -n4 --delay=1 --bitmap $bmf $dev1 $dev2 $dev3 $dev4 check wait testdev $md0 2 $mdsize1 512 mdadm -S $md0 mdadm --assemble $md0 --bitmap=$bmf $dev1 $dev2 $dev3 $dev4 testdev $md0 2 $mdsize1 512 dirty1=`mdadm -X $bmf | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'` sleep 4 dirty2=`mdadm -X $bmf | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'` if [ $dirty1 -lt 400 -o $dirty2 -ne 0 ] then echo >&2 "ERROR bad 'dirty' counts: $dirty1 and $dirty2" exit 1 fi mdadm $md0 -f $dev3 testdev $md0 2 $mdsize1 512 sleep 4 dirty3=`mdadm -X $bmf | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'` if [ $dirty3 -lt 400 ] then echo >&2 "ERROR dirty count $dirty3 is too small" exit 2 fi mdadm -S $md0 mdadm --assemble -R $md0 --bitmap=$bmf $dev1 $dev2 $dev4 mdadm --zero $dev3 # force --add, not --re-add mdadm $md0 --add $dev3 check recovery dirty4=`mdadm -X $bmf | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'` check wait sleep 4 dirty5=`mdadm -X $bmf | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'` if [ $dirty4 -lt 400 -o $dirty5 -ne 0 ] then echo echo >&2 "ERROR bad 'dirty' counts at end: $dirty4 $dirty5" exit 1 fi mdadm -S $md0