I am setting up a system with two 3TB hard drives as storage backing. As it's a desktop station, I thougth about the following disk setup:
sda + /boot with 500MB + btrfs for the remaining GBytes sdb + btrfs for all the 3000GB
I then thought about using the
single-mode for data on
/ and create a subvolume for
/home (and potentially others) using
raid1 as data mode. Is that possible with current (kernel 3.7.X) btrfs? Does anyone have sources for that, I was unable to find anything.
UPDATE: I made a small test setup consisting of two plain files hooked in as loopback devices for playing around. On those files, I created a plain btrfs. Then I did the following:
btrfs subvolume create test dd if=/dev/urandom of=foo bs=1024 count=1 # use random data to prevent dedup dd if=/dev/urandom of=test/bar bs=1024 count=1 # use random data to prevent dedup btrfs balance start -dconvert=raid1 test btrfs balance start -dconvert=single . btrfs filesystem df .
That showed the filesystem having all its usage in single mode, instead of partial RAID1 and partial single mode… what did I do wrong?