# Then do some IO first. Resync should still be very fast
#
-mdadm -CR $md0 -l1 -n2 -binternal -d1 $dev1 $dev2
+mdadm -CR $md0 -l1 -n2 -binternal --bitmap-chunk=4 -d1 $dev1 $dev2
check resync
check wait
-testdev $md0 1 $mdsize1 1
+testdev $md0 1 $mdsize1a 64
sleep 4
mdadm $md0 -f $dev2
mdadm $md0 -f $dev2
sleep 1
mdadm $md0 -r $dev2
-testdev $md0 1 $mdsize1 1
+testdev $md0 1 $mdsize1a 64
mdadm $md0 -a $dev2
check wait
-cmp --ignore-initial=$[16*512] --bytes=$[$mdsize0*1024] $dev1 $dev2
+blockdev --flushbufs $dev1 $dev2
+cmp --ignore-initial=$[64*512] --bytes=$[$mdsize0*1024] $dev1 $dev2
mdadm $md0 -f $dev2; sleep 1
mdadm $md0 -r $dev2
if dd if=/dev/zero of=$md0 ; then : ; fi
+blockdev --flushbufs $md0 # ensure writes have been sent.
mdadm $md0 -a $dev2
check recovery
check wait
-cmp --ignore-initial=$[16*512] --bytes=$[$mdsize0*1024] $dev1 $dev2
+blockdev --flushbufs $dev1 $dev2
+cmp --ignore-initial=$[64*512] --bytes=$[$mdsize0*1024] $dev1 $dev2
mdadm -S $md0