Good morning btrfs list,
I had written about 2 weeks ago about using extra btrfs space in an nfs
file system setup. Nfs seems to export the files but the mounts don't
work on older machines without btrfs kernels. So I am down to deleting
several drives from btrfs to setup a standard raid 1 array for storage
and export via nfs. My system stats are:
[root@advanced ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdm2 196G 50G 137G 27% /
tmpfs 16G 0 16G 0% /dev/shm
/dev/sdm1 2.0G 141M 1.8G 8% /boot
/dev/sdm5 1.2T 20G 1.1T 2% /var
10.2.0.40:/data/sites
2.6T 2.4T 155G 94% /nfs1/data/sites
10.2.0.42:/data/sites
2.6T 2.2T 328G 87% /nfs2/data/sites
/dev/sda 11T 4.9T 6.0T 46% /btrfs
[root@advanced ~]# btrfs fi show
failed to read /dev/sr0
Label: none uuid: c21f1221-a224-4ba4-92e5-cdea0fa6d0f9
Total devices 12 FS bytes used 4.76TB
devid 6 size 930.99GB used 429.32GB path /dev/sdf
devid 5 size 930.99GB used 429.32GB path /dev/sde
devid 8 size 930.99GB used 429.32GB path /dev/sdh
devid 9 size 930.99GB used 429.32GB path /dev/sdi
devid 4 size 930.99GB used 429.32GB path /dev/sdd
devid 3 size 930.99GB used 429.32GB path /dev/sdc
devid 11 size 930.99GB used 429.08GB path /dev/sdk
devid 2 size 930.99GB used 429.32GB path /dev/sdb
devid 10 size 930.99GB used 429.32GB path /dev/sdj
devid 12 size 930.99GB used 429.33GB path /dev/sdl
devid 7 size 930.99GB used 429.32GB path /dev/sdg
devid 1 size 930.99GB used 429.09GB path /dev/sda
Btrfs v0.19-35-g1b444cd
df -h and btrfs fi show seem to be in good size agreement. Btrfs was
created as raid1 metadata and raid0 data. I would like to delete the
last 4 drives leaving 7T of space to hold 4.9T of data. My plan would
be to remove /dev/sdi, j, k, l one at a time. After all are deleted run
"btrfs fi balance /btrfs". The data is not critical and can be lost but
I am really trying to avoid the hassle of having to completely redo the
filesystem. Does my deletion plan seem reasonable. Please, I'm really
swimming alone here and would value some advice.
Jim Maloney
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