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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