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# create two raid1s, build a raid0 on top, then
# tear it down and get auto-assemble to rebuild it.
#the length of md0/md1/md2 is same. So use md0 here.
is_raid_foreign $md0
mdadm -CR $md1 -l1 -n2 $dev0 $dev1 --homehost=testing
mdadm -CR $md2 -l1 -n2 $dev2 $dev3 --homehost=testing
mdadm -CR $md0 -l0 -n2 $md1 $md2 --homehost=testing
mdadm -Ss
mdadm -As -c /dev/null --homehost=testing -vvv
testdev $md1 1 $mdsize1a 64
testdev $md2 1 $mdsize1a 64
# md1 and md2 will be incremental assemble by udev rule. And
# the testing machines' hostname is not testing. The md0 will
# be considered as a foreign array. It can use 0 as metadata
# name. md127 will be used
testdev $md127 2 $mdsize11a 512
mdadm --stop $md127
mdadm --zero-superblock $md1
mdadm --zero-superblock $md2
mdadm -Ss
mdadm --zero-superblock $dev0 $dev1 $dev2 $dev3
## Now the raid0 uses one stacked and one not
mdadm -CR $md1 -l1 -n2 $dev0 $dev1 --homehost=testing
mdadm -CR $md0 -l0 -n2 $md1 $dev2 --homehost=testing
mdadm -Ss
mdadm -As -c /dev/null --homehost=testing -vvv
testdev $md1 1 $mdsize1a 64
testdev $md127 1 $[mdsize1a+mdsize11a] 512
mdadm --stop $md127
mdadm --zero-superblock $md1
mdadm -Ss
# Don't specify homehost when creating raid and use the test
# machine's homehost. For super1.2, if homehost name's length
# is > 32, it doesn't use homehost name in metadata name and
# the array will be treated as foreign array
mdadm --zero-superblock $dev0 $dev1 $dev2 $dev3
mdadm -CR $md1 -l1 -n2 $dev0 $dev1
mdadm -CR $md2 -l1 -n2 $dev2 $dev3
mdadm -CR $md0 -l0 -n2 $md1 $md2
mdadm -Ss
mdadm -As -c /dev/null
if [ $is_foreign == "yes" ]; then
# md127 is md1
testdev $md127 1 $mdsize1a 64
# md126 is md0, udev rule incremental assemble it
testdev $md126 2 $mdsize11a 512
# md125 is md2
testdev $md125 1 $mdsize1a 64
else
testdev $md1 1 $mdsize1a 64
testdev $md2 1 $mdsize1a 64
testdev $md0 2 $mdsize11a 512
fi
mdadm -Ss
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