tests/07changelevels

   1
   2 # Test changing of level, chunksize etc.
   3 # Create a RAID1, convert to RAID5, add a disk, add another disk
   4 # convert to RAID6, back to RAID5 and ultimately to RAID1
   5
   6 testK=$[64*3*6]
   7 dd if=/dev/urandom of=/tmp/RandFile bs=1024 count=$testK
   8 export MDADM_GROW_VERIFY=1
   9
  10 dotest() {
  11  sleep 0.5
  12  check wait
  13  testdev $md0 $1 19968 64 nd
  14  blockdev --flushbufs $md0
  15  cmp -s -n $[textK*1024] $md0 /tmp/RandFile || { echo cmp failed; exit 2; }
  16  # write something new - shift chars 4 space
  17  tr ' -~' '$-~ -#' < /tmp/RandFile > /tmp/RandFile2
  18  mv /tmp/RandFile2 /tmp/RandFile
  19  dd if=/tmp/RandFile of=$md0
  20 }
  21
  22 checkgeo() {
  23  # check the geometry of an array
  24  # level raid_disks chunk_size layout
  25  dev=$1
  26  shift
  27  sleep 0.5
  28  check wait
  29  for attr in level raid_disks chunk_size layout
  30  do
  31    if [ $# -gt 0 ] ; then
  32       val=$1
  33       shift
  34       if [ " `cat /sys/block/$dev/md/$attr`" != " $val" ]
  35       then echo "$attr doesn't match for $dev"
  36            exit 1
  37       fi
  38    fi
  39  done
  40 }
  41
  42
  43 bu=/tmp/md-test-backup
  44 rm -f $bu
  45 mdadm -CR $md0 -l1 -n2 -x1 $dev0 $dev1 $dev2 -z 19968
  46 testdev $md0 1 $mdsize1a 64
  47 dd if=/tmp/RandFile of=$md0
  48 dotest 1
  49
  50 mdadm --grow $md0 -l5 -n3 --chunk 64
  51 dotest 2
  52
  53 mdadm $md0 --add $dev3 $dev4
  54 mdadm --grow $md0 -n4 --chunk 32
  55 dotest 3
  56
  57 mdadm -G $md0 -l6 --backup-file $bu
  58 dotest 3
  59
  60 mdadm -G /dev/md0 --array-size 39936
  61 mdadm -G $md0 -n4 --backup-file $bu
  62 dotest 2
  63
  64 mdadm -G $md0 -l5 --backup-file $bu
  65 dotest 2
  66
  67 mdadm -G /dev/md0 --array-size 19968
  68 mdadm -G $md0 -n2 --backup-file $bu
  69 dotest 1
  70
  71 mdadm -G --level=1 $md0
  72 dotest 1
  73
  74 # now repeat that last few steps only with a degraded array.
  75 mdadm -S $md0
  76 mdadm -CR $md0 -l6 -n5 $dev0 $dev1 $dev2 $dev3 $dev4
  77 dd if=/tmp/RandFile of=$md0
  78 dotest 3
  79
  80 mdadm $md0 --fail $dev0
  81
  82 mdadm -G /dev/md0 --array-size 39936
  83 mdadm -G $md0 -n4 --backup-file $bu
  84 dotest 2
  85 mdadm $md0 --fail $dev4
  86
  87 mdadm $md0 --fail $dev3
  88 # now double-degraded.
  89 # switch layout to a DDF layout and back to make sure that works.
  90
  91 mdadm -G /dev/md0 --layout=ddf-N-continue --backup-file $bu
  92 checkgeo md0 raid6 4 $[512*1024] 10
  93 dotest 2
  94 mdadm -G /dev/md0 --layout=ra --backup-file $bu
  95 checkgeo md0 raid6 4 $[512*1024] 1
  96 dotest 2
  97
  98 mdadm -G $md0 -l5 --backup-file $bu
  99 dotest 2
 100
 101 mdadm -G /dev/md0 --array-size 19968
 102 mdadm -G $md0 -n2 --backup-file $bu
 103 dotest 1
 104 mdadm $md0 --fail $dev2
 105
 106 mdadm -G --level=1 $md0
 107 dotest 1