| |
| # Test changing of level, chunksize etc. |
| # Create a RAID1, convert to RAID5, add a disk, add another disk |
| # convert to RAID6, back to RAID5 and ultimately to RAID1 |
| |
| testK=$[64*3*6] |
| dd if=/dev/urandom of=/tmp/RandFile bs=1024 count=$testK |
| export MDADM_GROW_VERIFY=1 |
| |
| dotest() { |
| sleep 2 |
| check wait |
| testdev $md0 $1 19968 64 nd |
| blockdev --flushbufs $md0 |
| cmp -s -n $[textK*1024] $md0 /tmp/RandFile || { echo cmp failed; exit 2; } |
| # write something new - shift chars 4 space |
| tr ' -~' '$-~ -#' < /tmp/RandFile > /tmp/RandFile2 |
| mv /tmp/RandFile2 /tmp/RandFile |
| dd if=/tmp/RandFile of=$md0 |
| } |
| |
| checkgeo() { |
| # check the geometry of an array |
| # level raid_disks chunk_size layout |
| dev=$1 |
| shift |
| sleep 0.5 |
| check wait |
| sleep 1 |
| for attr in level raid_disks chunk_size layout |
| do |
| if [ $# -gt 0 ] ; then |
| val=$1 |
| shift |
| if [ " `cat /sys/block/$dev/md/$attr`" != " $val" ] |
| then echo "$attr doesn't match for $dev" |
| exit 1 |
| fi |
| fi |
| done |
| } |
| |
| |
| bu=/tmp/md-test-backup |
| rm -f $bu |
| mdadm -CR $md0 -l1 -n2 -x1 $dev0 $dev1 $dev2 -z 19968 |
| testdev $md0 1 $mdsize1a 64 |
| dd if=/tmp/RandFile of=$md0 |
| dotest 1 |
| |
| mdadm --grow $md0 -l5 -n3 --chunk 64 |
| dotest 2 |
| |
| mdadm $md0 --add $dev3 $dev4 |
| mdadm --grow $md0 -n4 --chunk 32 |
| dotest 3 |
| |
| mdadm -G $md0 -l6 --backup-file $bu |
| dotest 3 |
| |
| mdadm -G /dev/md0 --array-size 39936 |
| mdadm -G $md0 -n4 --backup-file $bu |
| checkgeo md0 raid6 4 $[32*1024] |
| dotest 2 |
| |
| mdadm -G $md0 -l5 --backup-file $bu |
| checkgeo md0 raid5 3 $[32*1024] |
| dotest 2 |
| |
| mdadm -G /dev/md0 --array-size 19968 |
| mdadm -G $md0 -n2 --backup-file $bu |
| checkgeo md0 raid5 2 $[32*1024] |
| dotest 1 |
| |
| mdadm -G --level=1 $md0 |
| dotest 1 |
| |
| # now repeat that last few steps only with a degraded array. |
| mdadm -S $md0 |
| mdadm -CR $md0 -l6 -n5 $dev0 $dev1 $dev2 $dev3 $dev4 |
| dd if=/tmp/RandFile of=$md0 |
| dotest 3 |
| |
| mdadm $md0 --fail $dev0 |
| |
| mdadm -G /dev/md0 --array-size 37888 |
| mdadm -G $md0 -n4 --backup-file $bu |
| dotest 2 |
| checkgeo md0 raid6 4 $[512*1024] |
| mdadm $md0 --fail $dev4 |
| |
| mdadm $md0 --fail $dev3 |
| # now double-degraded. |
| # switch layout to a DDF layout and back to make sure that works. |
| |
| mdadm -G /dev/md0 --layout=ddf-N-continue --backup-file $bu |
| checkgeo md0 raid6 4 $[512*1024] 10 |
| dotest 2 |
| mdadm -G /dev/md0 --layout=ra --backup-file $bu |
| checkgeo md0 raid6 4 $[512*1024] 1 |
| dotest 2 |
| |
| mdadm -G $md0 -l5 --backup-file $bu |
| dotest 2 |
| |
| mdadm -G /dev/md0 --array-size 18944 |
| mdadm -G $md0 -n2 --backup-file $bu |
| dotest 1 |
| checkgeo md0 raid5 2 $[512*1024] |
| mdadm $md0 --fail $dev2 |
| |
| mdadm -G --level=1 $md0 |
| dotest 1 |
| checkgeo md0 raid1 2 |
