Hello.
I have a Raid1 pool consisting of 6 drives, 3 3TB disks and 3 2TB disks.
Until yesterday it consisted of 3 2TB disks, 2 3TB disks and one 1TB disk.
I replaced the 1TB disk as the pool was close to full.
Replacement went well, and I ended up with 5 almost full disks, and 1
3TB disk that was one third full.
So I kicked of a balance, expecting it to balance the data as evenly as
possible on the 6 disks (btrfs balace start poolname).
The balance ran fine but I ended up with this:
Total devices 6 FS bytes used 5.66TiB
devid 9 size 2.73TiB used 2.69TiB path /dev/sdf
devid 10 size 1.82TiB used 1.78TiB path /dev/sdb
devid 11 size 1.82TiB used 1.73TiB path /dev/sdc
devid 12 size 1.82TiB used 1.73TiB path /dev/sdd
devid 13 size 2.73TiB used 2.65TiB path /dev/sde
devid 15 size 2.73TiB used 817.87GiB path /dev/sdg
The sixth drive sdg, is still only one third full.
How do I force BTRFS to distribute the data more evenly across the disks?
The way BTRFS has done it now, will bring problems, when I write more
data to the array.
