+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=file1
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0282154 s, 37.2 MB/s
+ losetup /dev/loop1 file1
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=file2
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0286058 s, 36.7 MB/s
+ losetup /dev/loop2 file2
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=file3
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0228529 s, 45.9 MB/s
+ losetup /dev/loop3 file3
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=file4
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0212256 s, 49.4 MB/s
+ losetup /dev/loop4 file4
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=file5
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0218185 s, 48.1 MB/s
+ losetup /dev/loop5 file5
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=file6
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0206604 s, 50.8 MB/s
+ losetup /dev/loop6 file6
+ mdadm --version
mdadm - v2.6.8 - 28th November 2008
+ mdadm --create /dev/md0 --level=4 --raid-devices=2 /dev/loop1 /dev/loop2
mdadm: array /dev/md0 started.
+ mdadm --add /dev/md0 /dev/loop5 /dev/loop6
mdadm: added /dev/loop5
mdadm: added /dev/loop6
+ mdadm --grow /dev/md0 --level=0 --raid-devices=4
mdadm: Need to backup 192K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --grow /dev/md0 --level=1 --raid-devices=4
mdadm: Need to backup 192K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --grow /dev/md0 --level=5 --raid-devices=4
mdadm: Need to backup 192K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --grow /dev/md0 --level=6 --raid-devices=4
mdadm: Need to backup 128K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --stop /dev/md0
mdadm: stopped /dev/md0
+ clean_blocks
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop1
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0373165 s, 28.1 MB/s
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop2
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0339725 s, 30.9 MB/s
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop3
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0338767 s, 31.0 MB/s
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop4
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0360351 s, 29.1 MB/s
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop5
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0385152 s, 27.2 MB/s
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop6
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.035234 s, 29.8 MB/s
+ mdadm --create /dev/md0 --level=5 --raid-devices=2 /dev/loop1 /dev/loop2
mdadm: array /dev/md0 started.
+ mdadm --add /dev/md0 /dev/loop5 /dev/loop6
mdadm: added /dev/loop5
mdadm: added /dev/loop6
+ mdadm --grow /dev/md0 --level=0 --raid-devices=4
mdadm: Need to backup 192K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --grow /dev/md0 --level=1 --raid-devices=4
mdadm: Need to backup 192K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --grow /dev/md0 --level=4 --raid-devices=4
mdadm: Need to backup 192K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --grow /dev/md0 --level=6 --raid-devices=4
mdadm: Need to backup 128K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --stop /dev/md0
mdadm: stopped /dev/md0
+ clean_blocks
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop1
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0334887 s, 31.3 MB/s
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop2
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0338361 s, 31.0 MB/s
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop3
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.044491 s, 23.6 MB/s
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop4
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0335885 s, 31.2 MB/s
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop5
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0372463 s, 28.2 MB/s
+ for i in '{1..6}'
+ dd if=/dev/zero bs=1M count=1 of=/dev/loop6
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0349408 s, 30.0 MB/s
+ mdadm --create /dev/md0 --level=6 --raid-devices=4 /dev/loop1 /dev/loop2 /dev/loop3 /dev/loop4
mdadm: array /dev/md0 started.
+ mdadm --add /dev/md0 /dev/loop5 /dev/loop6
mdadm: added /dev/loop5
mdadm: added /dev/loop6
+ mdadm --grow /dev/md0 --level=0 --raid-devices=6
mdadm: Need to backup 320K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --grow /dev/md0 --level=1 --raid-devices=6
mdadm: Need to backup 320K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --grow /dev/md0 --level=4 --raid-devices=6
mdadm: Need to backup 320K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --grow /dev/md0 --level=5 --raid-devices=6
mdadm: Need to backup 320K of critical section..
mdadm: Cannot set device size/shape for /dev/md0: Invalid argument
+ mdadm --stop /dev/md0
mdadm: stopped /dev/md0
+ exec