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Revision as of 17:40, 10 October 2013 by Rolffokkens (talk | contribs)


Description

/home on bcache (no LVM) Once your fresh Fedora 20 system is running, we will "move" /home to a bcache device. To do this it's convenient to have a minimum amount of data on /home. Do the following steps:

Setup

  1. Open terminal
  2. Switch to root user: su -
  3. Install bcache tools: yum install bcache-tools
  4. If needed "backup" all data in /home to another place on your root filesystem:
    1. comment /home out in your /etc/fstab
    2. unmount /home (which is on /dev/sda2)
    3. Make /dev/sda2 a bcache backing device: make-bcache -B /dev/sda2
    4. Make /dev/sdb1 a bcache caching device: make-bcache -C /dev/sdb1
    5. Note the set uuid and attach /dev/sdb1 to /dev/sda2: echo <set uuid> > /sys/block/bcache0/bcache/attach

Now you have a bcache device: /dev/bcache0

  1. use "bcache-status -s" to see details about your bcache device.
  2. create a filesystem: mkfs -t ext4 -L HOME /dev/bcache0
  3. create a /home entry in your /etc/fstab: LABEL=HOME /home ext4 defaults 1 2
  4. mount /home: mount -a
  5. If needed restore the /home backup you made earlier.

Now you have a system with /home on bcache.

How to test

  1. reboot your system to see if it boots OK.
  2. do some other tests generation I/O on /home if you like.

Expected Results

  1. All steps complete without errors



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