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 2
  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  sleep 1
  30  for attr in level raid_disks chunk_size layout
  31  do
  32    if [ $# -gt 0 ] ; then
  33       val=$1
  34       shift
  35       if [ " `cat /sys/block/$dev/md/$attr`" != " $val" ]
  36       then echo "$attr doesn't match for $dev"
  37            exit 1
  38       fi
  39    fi
  40  done
  41 }
  42
  43
  44 bu=/tmp/md-test-backup
  45 rm -f $bu
  46 mdadm -CR $md0 -l1 -n2 -x1 $dev0 $dev1 $dev2 -z 19968
  47 testdev $md0 1 $mdsize1a 64
  48 dd if=/tmp/RandFile of=$md0
  49 dotest 1
  50
  51 mdadm --grow $md0 -l5 -n3 --chunk 64
  52 dotest 2
  53
  54 mdadm $md0 --add $dev3 $dev4
  55 mdadm --grow $md0 -n4 --chunk 32
  56 dotest 3
  57
  58 mdadm -G $md0 -l6 --backup-file $bu
  59 dotest 3
  60
  61 mdadm -G /dev/md0 --array-size 39936
  62 mdadm -G $md0 -n4 --backup-file $bu
  63 checkgeo md0 raid6 4 $[32*1024]
  64 dotest 2
  65
  66 mdadm -G $md0 -l5 --backup-file $bu
  67 checkgeo md0 raid5 3 $[32*1024]
  68 dotest 2
  69
  70 mdadm -G /dev/md0 --array-size 19968
  71 mdadm -G $md0 -n2 --backup-file $bu
  72 checkgeo md0 raid5 2 $[32*1024]
  73 dotest 1
  74
  75 mdadm -G --level=1 $md0
  76 dotest 1
  77
  78 # now repeat that last few steps only with a degraded array.
  79 mdadm -S $md0
  80 mdadm -CR $md0 -l6 -n5 $dev0 $dev1 $dev2 $dev3 $dev4
  81 dd if=/tmp/RandFile of=$md0
  82 dotest 3
  83
  84 mdadm $md0 --fail $dev0
  85
  86 mdadm -G /dev/md0 --array-size 37888
  87 mdadm -G $md0 -n4 --backup-file $bu
  88 dotest 2
  89 checkgeo md0 raid6 4 $[512*1024]
  90 mdadm $md0 --fail $dev4
  91
  92 mdadm $md0 --fail $dev3
  93 # now double-degraded.
  94 # switch layout to a DDF layout and back to make sure that works.
  95
  96 mdadm -G /dev/md0 --layout=ddf-N-continue --backup-file $bu
  97 checkgeo md0 raid6 4 $[512*1024] 10
  98 dotest 2
  99 mdadm -G /dev/md0 --layout=ra --backup-file $bu
 100 checkgeo md0 raid6 4 $[512*1024] 1
 101 dotest 2
 102
 103 mdadm -G $md0 -l5 --backup-file $bu
 104 dotest 2
 105
 106 mdadm -G /dev/md0 --array-size 18944
 107 mdadm -G $md0 -n2 --backup-file $bu
 108 dotest 1
 109 checkgeo md0 raid5 2 $[512*1024]
 110 mdadm $md0 --fail $dev2
 111
 112 mdadm -G --level=1 $md0
 113 dotest 1
 114 checkgeo md0 raid1 2