tests/01replace

   1 set -x -e
   2
   3 ## test --replace for raid5 raid6 raid1 and raid10
   4 #1/ after replace, can remove replaced device
   5 #2/ after --replace-with cannot remove the 'with' device
   6 #3/ preserve integrity with concurrent failure
   7
   8 for level in 1 5 6 10
   9 do
  10   dd if=/dev/zero of=$dev4 bs=1M || true
  11   dd if=/dev/zero of=$dev5 bs=1M || true
  12   mdadm -CR $md0 -l $level -n4 -x2 $devlist5
  13   dd if=/dev/urandom of=$md0 bs=1M || true
  14   sum=`sha1sum < $md0`
  15   check wait
  16   mdadm $md0 --replace $dev1
  17   check wait
  18   mdadm $md0 --remove $dev1
  19   mdadm $md0 --remove $dev5 && exit 1
  20   mdadm -S $md0
  21   dd if=/dev/zero of=$dev4 bs=1M || true
  22   dd if=/dev/zero of=$dev5 bs=1M || true
  23   mdadm -CR $md0 -l $level -n4 -x2 $devlist5
  24   check wait
  25   sum1=`sha1sum < $md0`
  26   [ "$sum" == "$sum1" ]
  27
  28   mdadm $md0 --replace $dev1 --with $dev4
  29   check wait
  30   mdadm $md0 --remove $dev1
  31   mdadm $md0 --remove $dev5
  32   mdadm $md0 --remove $dev4 && exit 1
  33
  34   mdadm $md0 --add $dev1 $dev5
  35   mdadm $md0 --replace $dev0
  36   sleep 1
  37   mdadm $md0 --fail $dev2
  38   check wait
  39   sum2=`sha1sum < $md0`
  40   [ "$sum" == "$sum2" ]
  41
  42   mdadm $md0 --remove $dev0 $dev2
  43   mdadm $md0 --add $dev0 $dev2
  44   mdadm $md0 --replace $dev3
  45   sleep 1
  46   mdadm $md0 --fail $dev0 $dev2
  47   check wait
  48   sum3=`sha1sum < $md0`
  49   [ "$sum" == "$sum3" ]
  50
  51   mdadm -S $md0
  52 done