QA:Testcase bcache-tools root on bcache (no LVM)

Description

/ on bcache (no LVM)

Now we have a stable system with /home on bcache, we can go forward and have / on bcache. Consider though that bcache is EXPERIMENTAL!

To get / on bcache we'll stop using /home on bcache first:

Setup

1. Open terminal
2. Switch to root user: su -
3. if needed make a bachup of /home on your root filesystem.
4. comment /home out in your /etc/fstab
5. unmount /home: umount /home
6. if needed restore your bachup to the /home directory

Now your /home is in your root filesystem. Next:

How to test

1. create a new filesystem on /dev/bcache0: mkfs -t ext4 -L ROOTFS /dev/bcache0
2. mount it: mount /dev/bcache0 /mnt
3. copy your current root filesystem to /mnt: cp -ax / /mnt
4. edit /mnt/fstab so your root fs is mounted like: LABEL=ROOTFS / ext4 defaults 1 1

Now we have a duplicate root filesystem on /dev/bcache0. To use it we need to build a new initramfs:

1. rename your current initramfs: mv /boot/initramfs...img /boot/initramfs...img.sav
2. build a new initramfs with dracut -N

Now reboot your system.

• while in grub replace the root=UUID=... parameter in the "linux" line by: root=LABEL=ROOTFS
• boot your system.

If all goes well, your system now boots fine and it's running on bcache!

• Edit your /etc/grub2.cfg file..
• .. duplicate the first "menuentry ... { ...}" (about 15 lines).
• Now change the first one and replace the root=UUID=... parameter in the "linux" line by root=LABEL=ROOTFS
• reboot again

Expected Results

1. All steps complete without errors
2. reboot your system to see if it boots OK.
3. do some other testing if you like.