mdadm/tests/16imsm-r0_3d-migrate-r5_4d

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. tests/env-imsm-template
# RAID 0 volume (3 disks) migrate to RAID 5 volume (4 disks)
# POSITIVE test
num_disks=3
device_list="$dev0 $dev1 $dev2"
# Before: RAID 0, 3 disks, 64k chunk size
vol0_level=0
vol0_comp_size=$((5 * 1024))
vol0_chunk=64
vol0_num_comps=$num_disks
vol0_offset=0
# After: RAID 5, 4 disks, 64k chunk size
vol0_new_level=5
new_num_disks=4
vol0_new_num_comps=$num_disks
vol0_new_chunk=64
. tests/imsm-grow-template 0 1