btrfs balance {,meta}data to raid5 not working?

[Piotr Szymaniak <szarpaj@grubelek.pl>]

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Hi,

I tried today to balance two drive btrfs raid1 to two drive btrfs raid5
without luck:

~ # btrfs balance start -dconvert=raid5 -mconvert=raid5 /mnt/cdrom/
ERROR: error during balancing '/mnt/cdrom/' - Invalid argument
There may be more info in syslog - try dmesg | tail
~ # btrfs balance start -mconvert=raid5 /mnt/cdrom/
ERROR: error during balancing '/mnt/cdrom/' - Invalid argument
There may be more info in syslog - try dmesg | tail
~ # btrfs balance start -dconvert=raid5 /mnt/cdrom/
ERROR: error during balancing '/mnt/cdrom/' - Invalid argument
There may be more info in syslog - try dmesg | tail
~ # dmesg | tail -3
[57073.050249] BTRFS error (device sdd): unable to start balance with
target data profile 128
[57079.674386] BTRFS error (device sdd): unable to start balance with
target metadata profile 128
[57082.754136] BTRFS error (device sdd): unable to start balance with
target data profile 128

Linux 3.19.3
btrfs-progs v3.19.1


Piotr Szymaniak.
-- 
Nie wierze,  zeby wyslali cie tam, nie w tym kraju, gdzie zabojcom daje
sie  po lapie i po dwoch latach ogladania kolorowej telewizji w wiezie-
niu znow wypuszcza na ulice, zeby mogli zabijac.
  -- Stephen King, "Apt Pupil"

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