Thanks, Roman, you got me back on Track! I am new to btrfs so I was assuming RAID0 means there is no need for equally sized disks.
After `btrfs balance start -dconvert=single -dlimit=10 /' output of `btrfs
filesystem usage /' now shows:
Overall:
Device size: 579.51GiB
Device allocated: 126.99GiB
Device unallocated: 452.52GiB
Device missing: 0.00B
Used: 125.42GiB
Free (estimated): 452.72GiB (min: 226.46GiB)
Data ratio: 1.00
Metadata ratio: 2.00
Global reserve: 24.05MiB (used: 0.00B)
Data,single: Size:19.00GiB, Used:18.98GiB
/dev/sdd 19.00GiB
Data,RAID0: Size:105.97GiB, Used:105.79GiB
/dev/sdb2 36.99GiB
/dev/sdc 31.99GiB
/dev/sdd 36.99GiB
Metadata,RAID1: Size:1.00GiB, Used:333.61MiB
/dev/sdb2 1.00GiB
/dev/sdd 1.00GiB
System,RAID1: Size:8.00MiB, Used:16.00KiB
/dev/sdc 8.00MiB
/dev/sdd 8.00MiB
Unallocated:
/dev/sdb2 9.52GiB
/dev/sdc 1.00MiB
/dev/sdd 443.00GiB
And finally:
# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 3.9G 8.0K 3.9G 1% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 17M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sdb2 580G 126G 20G 87% /
/dev/sdb2 580G 126G 20G 87% /.snapshots
/dev/sdb2 580G 126G 20G 87% /usr/local
/dev/sdb2 580G 126G 20G 87% /opt
/dev/sdb2 580G 126G 20G 87% /root
/dev/sdb2 580G 126G 20G 87% /boot/grub2/i386-pc
/dev/sdb2 580G 126G 20G 87% /boot/grub2/x86_64-efi
/dev/sdb2 580G 126G 20G 87% /srv
/dev/sdb2 580G 126G 20G 87% /var
/dev/sdb2 580G 126G 20G 87% /tmp
/dev/sdb2 580G 126G 20G 87% /home
/dev/sdb2 580G 126G 20G 87% /var/cache
/dev/sdb1 500M 5.3M 495M 2% /boot/efi
tmpfs 796M 0 796M 0% /run/user/0
Thanks a lot! I will now read further documentation regarding "btrfs single
vs RAID*" to understand exactly why and how and also convert remaining space
to single (it's just a test
system).
Thanks a lot!
BR,
Heiner
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