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
7 dd if=/dev/urandom of=/tmp/RandFile bs=1024 count=$testK
8 export MDADM_GROW_VERIFY=1
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
23 # check the geometry of an array
24 # level raid_disks chunk_size layout
29 for attr in level raid_disks chunk_size layout
31 if [ $# -gt 0 ] ; then
34 if [ " `cat /sys/block/$dev/md/$attr`" != " $val" ]
35 then echo "$attr doesn't match for $dev"
43 bu=/tmp/md-test-backup
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
50 mdadm --grow $md0 -l5 -n3 --chunk 64
53 mdadm $md0 --add $dev3 $dev4
54 mdadm --grow $md0 -n4 --chunk 32
57 mdadm -G $md0 -l6 --backup-file $bu
60 mdadm -G /dev/md0 --array-size 39936
61 mdadm -G $md0 -n4 --backup-file $bu
64 mdadm -G $md0 -l5 --backup-file $bu
67 mdadm -G /dev/md0 --array-size 19968
68 mdadm -G $md0 -n2 --backup-file $bu
71 mdadm -G --level=1 $md0
74 # now repeat that last few steps only with a degraded array.
76 mdadm -CR $md0 -l6 -n5 $dev0 $dev1 $dev2 $dev3 $dev4
77 dd if=/tmp/RandFile of=$md0
80 mdadm $md0 --fail $dev0
82 mdadm -G /dev/md0 --array-size 39936
83 mdadm -G $md0 -n4 --backup-file $bu
85 mdadm $md0 --fail $dev4
87 mdadm $md0 --fail $dev3
88 # now double-degraded.
89 # switch layout to a DDF layout and back to make sure that works.
91 mdadm -G /dev/md0 --layout=ddf-N-continue --backup-file $bu
92 checkgeo md0 raid6 4 $[512*1024] 10
94 mdadm -G /dev/md0 --layout=ra --backup-file $bu
95 checkgeo md0 raid6 4 $[512*1024] 1
98 mdadm -G $md0 -l5 --backup-file $bu
101 mdadm -G /dev/md0 --array-size 19968
102 mdadm -G $md0 -n2 --backup-file $bu
104 mdadm $md0 --fail $dev2
106 mdadm -G --level=1 $md0