I have a RAID1 btrfs filesystem with 2 2Tb drives, and I had a spare 750 Gb hdd lying around, so I thought I would add it to the RAID so I could use some extra storage.
Well, I added it to the volume, and the amount of available free space increased as predicted, by half the amount of the newly added hdd. I did a
btrfs balance /hdd and now the output to
btrfs filesystem show is:
Label: none uuid: e100a7bd-1c03-4424-9ab2-4aa9fa679b8c Total devices 3 FS bytes used 496.82GiB devid 1 size 1.82TiB used 500.03GiB path /dev/sda1 devid 2 size 1.82TiB used 500.03GiB path /dev/sdd1 devid 3 size 698.64GiB used 0.00B path /dev/sdc
The relevant line from
Filesystem Size Used Avail Use% Mounted on /dev/sda1 2,2T 498G 1,4T 27% /hdd
Is it normal that the new drive is empty even after the rebalance? Do I need to do something else? Am I doing something wrong?
I'm using Netrunner Rolling if that's relevant.
UPDATE: So one of my 2 Tb drives died, so i added a 250 Gb and a 1 Tb drives to the filesystem, and did a balance. Here's the current situation:
Label: 'dades' uuid: e100a7bd-1c03-4424-9ab2-4aa9fa679b8c Total devices 4 FS bytes used 589.10GiB devid 1 size 1.82TiB used 592.03GiB path /dev/sdb1 devid 3 size 698.64GiB used 180.00GiB path /dev/sdd devid 4 size 232.89GiB used 0.00B path /dev/sda devid 5 size 931.51GiB used 412.03GiB path /dev/sde
Filesystem Size Used Avail Use% Mounted on /dev/sdb1 1,9T 590G 755G 44% /hdd