I've tried to set up bcache in Ubuntu 14.04 with a fresh install and an empty
/home partition (
/dev/sdb2) as a backing device. I have a running system on my SSD and I'd like to use its
/dev/sda2 partition to cache my
I've always managed to sort my ubuntu problems out from forums but I'm struggling to understand the basics here and need help:
- What account do I need to be logged in when I set up bcache in the first place? Obviously the user created during install on
/dev/sdb2has to be logged out for
/hometo be unmounted, so I set up a temporary user account on a separate partition to do it. This seems too clumsy already.
-Cboth tell me that there are non-bcache superblocks on the device so I did
sudo wipefs -aon both of the devices. The partitions then appear as unformatted without an UUID in GParted. Is this normal?
If so, what happens to fstab and
/homeat boot? Do I need to use bcache's UUID in fstab? I did but the system didn't find the
/homepartition upon next boot.
echo /dev/sdb2 > /sys/fs/bcache/registerand
echo /dev/sda2 > /sys/fs/bcache/registerreturn 'Permission denied' messages; as I understand
/syscannot be written to.
echo /dev/sdb2 | sudo tee /sys/fs/bcache/registerseems to have worked.
Can someone verify this is the proper way to do it in Ubuntu?
I seem to have managed to create, register and attach the backing drive but according to the
tail /sys/block/bcache0/bcache/stats_total/* I only have bypassed data.
My whole setup is quite a mess now so any clarification would be greatly appreciated.