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+
+# Check integrity of raid5 in degraded mode
+# Create a 4 disk raid5, create a filesystem and
+# sha1sum it with each device failed
+
+if [ "$INTEGRITY" != "yes" ]; then
+ echo -ne 'skipping... '
+ exit 0
+fi
+
+for layout in ls rs la ra
+do
+ mdadm -CR $md0 -l5 --layout $layout -n4 $dev0 $dev1 $dev2 $dev3
+ check wait
+ tar cf - /etc > $md0
+ sum=`sha1sum $md0`
+
+ for i in $dev0 $dev1 $dev2 $dev3
+ do
+ mdadm $md0 -f $i
+ mdadm $md0 -r $i
+ blockdev --flushbufs $md0
+ sum1=`sha1sum $md0`
+ if [ "$sum" != "$sum1" ]
+ then
+ echo $sum does not match $sum1 with $i missing
+ exit 1
+ fi
+ mdadm $md0 -a $i
+ while ! (check state 'U*'); do check wait; sleep 0.2; done
+ done
+ mdadm -S $md0
+done