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
30 for attr in level raid_disks chunk_size layout
32 if [ $# -gt 0 ] ; then
35 if [ " `cat /sys/block/$dev/md/$attr`" != " $val" ]
36 then echo "$attr doesn't match for $dev"
44 bu=/tmp/md-test-backup
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
51 mdadm --grow $md0 -l5 -n3 --chunk 64
54 mdadm $md0 --add $dev3 $dev4
55 mdadm --grow $md0 -n4 --chunk 32
58 mdadm -G $md0 -l6 --backup-file $bu
61 mdadm -G /dev/md0 --array-size 39936
62 mdadm -G $md0 -n4 --backup-file $bu
63 checkgeo md0 raid6 4 $[32*1024]
66 mdadm -G $md0 -l5 --backup-file $bu
67 checkgeo md0 raid5 3 $[32*1024]
70 mdadm -G /dev/md0 --array-size 19968
71 mdadm -G $md0 -n2 --backup-file $bu
72 checkgeo md0 raid5 2 $[32*1024]
75 mdadm -G --level=1 $md0
78 # now repeat that last few steps only with a degraded array.
80 mdadm -CR $md0 -l6 -n5 $dev0 $dev1 $dev2 $dev3 $dev4
81 dd if=/tmp/RandFile of=$md0
84 mdadm $md0 --fail $dev0
86 mdadm -G /dev/md0 --array-size 37888
87 mdadm -G $md0 -n4 --backup-file $bu
89 checkgeo md0 raid6 4 $[512*1024]
90 mdadm $md0 --fail $dev4
92 mdadm $md0 --fail $dev3
93 # now double-degraded.
94 # switch layout to a DDF layout and back to make sure that works.
96 mdadm -G /dev/md0 --layout=ddf-N-continue --backup-file $bu
97 checkgeo md0 raid6 4 $[512*1024] 10
99 mdadm -G /dev/md0 --layout=ra --backup-file $bu
100 checkgeo md0 raid6 4 $[512*1024] 1
103 mdadm -G $md0 -l5 --backup-file $bu
106 mdadm -G /dev/md0 --array-size 18944
107 mdadm -G $md0 -n2 --backup-file $bu
109 checkgeo md0 raid5 2 $[512*1024]
110 mdadm $md0 --fail $dev2
112 mdadm -G --level=1 $md0