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