tests/19raid6auto-repair

   1 number_of_disks=5
   2 chunksize_in_kib=512
   3 chunksize_in_b=$[chunksize_in_kib*1024]
   4 array_data_size_in_kib=$[chunksize_in_kib*(number_of_disks-2)*number_of_disks]
   5 array_data_size_in_b=$[array_data_size_in_kib*1024]
   6 devs="$dev0 $dev1 $dev2 $dev3 $dev4"
   7
   8 # default 2048 sectors
   9 data_offset_in_kib=$[2048/2]
  10
  11 # make a raid5 from a file
  12 dd if=/dev/urandom of=/tmp/RandFile bs=1024 count=$array_data_size_in_kib
  13
  14 # perform test for every layout
  15 layouts="ls rs la ra parity-first ddf-zero-restart ddf-N-restart ddf-N-continue \
  16         left-asymmetric-6 right-asymmetric-6 left-symmetric-6 \
  17         right-symmetric-6 parity-first-6"
  18
  19 for layout in $layouts
  20 do
  21     mdadm -CR $md0 -l6 --layout=$layout -n$number_of_disks -c $chunksize_in_kib $devs
  22     dd if=/tmp/RandFile of=$md0 bs=1024 count=$array_data_size_in_kib
  23     blockdev --flushbufs $md0; sync
  24     check wait
  25     blockdev --flushbufs $devs; sync
  26     echo 3 > /proc/sys/vm/drop_caches
  27     cmp -s -n $array_data_size_in_b $md0 /tmp/RandFile || { echo sanity cmp failed ; exit 2; }
  28
  29     # wipe out 5 chunks on each device
  30     dd if=/dev/urandom of=$dev0 bs=1024 count=$[5*chunksize_in_kib] seek=$[data_offset_in_kib+chunksize_in_kib*0]
  31     dd if=/dev/urandom of=$dev1 bs=1024 count=$[5*chunksize_in_kib] seek=$[data_offset_in_kib+chunksize_in_kib*5]
  32     dd if=/dev/urandom of=$dev2 bs=1024 count=$[5*chunksize_in_kib] seek=$[data_offset_in_kib+chunksize_in_kib*10]
  33     dd if=/dev/urandom of=$dev3 bs=1024 count=$[5*chunksize_in_kib] seek=$[data_offset_in_kib+chunksize_in_kib*15]
  34     dd if=/dev/urandom of=$dev4 bs=1024 count=$[5*chunksize_in_kib] seek=$[data_offset_in_kib+chunksize_in_kib*20]
  35
  36     blockdev --flushbufs $devs; sync
  37     echo 3 > /proc/sys/vm/drop_caches
  38
  39     $dir/raid6check $md0 0 0 2>&1 | grep -qs "Error" || { echo should detect errors; exit 2; }
  40
  41     $dir/raid6check $md0 0 0 autorepair > /dev/null || { echo repair failed; exit 2; }
  42     blockdev --flushbufs $md0 $devs; sync
  43     echo 3 > /proc/sys/vm/drop_caches
  44
  45     $dir/raid6check $md0 0 0 2>&1 | grep -qs "Error" && { echo errors detected; exit 2; }
  46     cmp -s -n $array_data_size_in_b $md0 /tmp/RandFile || { echo cmp failed ; exit 2; }
  47
  48     mdadm -S $md0
  49 done