From Fedora Project Wiki
The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then publish the changes below to finish undoing the edit.
Latest revision | Your text | ||
Line 138: | Line 138: | ||
=== Test case 2.A: /home on bcache (LVM)=== | === Test case 2.A: /home on bcache (LVM)=== | ||
Once your fresh Fedora 20 system is running, we will "move" /home to a Logical Volume (LVM) on a bcache device. Because of the flexibility that LVM provides the approach is quite different from page 1.A, for example we'll start by using sda4! | Once your fresh Fedora 20 system is running, we will "move" /home to a Logical Volume (LVM) on a bcache device. Because of the flexibility that LVM provides the approach is quite different from page 1.A, for example we'll start by using sda4! Do the following steps: | ||
* yum install bcache-tools lvm2 | |||
* Make /dev/sda4 a bcache backing device: make-bcache -B /dev/sda4 | |||
* Make /dev/sdb1 a bcache caching device: make-bcache -C /dev/sdb1 | |||
* 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 | |||
* use "bcache-status -s" to see details about your bcache device. | |||
* create a Physical Volume: pvcreate /dev/bcache0 | |||
* create a Volume Group: vgcreate BCACHE /dev/bcache0 | |||
* create a Logical Volume: lvcreate -L 2G -n HOME BCACHE | |||
* create a filesystem: mkfs -t ext4 -L HOME /dev/BCACHE/HOME | |||
This will be our new /home device. To use it first move the current /home to another mount point: | |||
* replace /home entry in your /etc/fstab: LABEL=HOME /home ext4 defaults 1 2 | |||
* mkdir /home.old | |||
* umount /home | |||
* mount /dev/sda2 /home.old | |||
* mount /home | |||
* cp -ax /home.old/* /home | |||
* umount /home.old | |||
* build a new initramfs with dracut??? | |||
Now you have a system with /home on LVM2 on bcache. | |||
* reboot your system to see if it boots OK. | |||
* do some other testing if you like. | |||
=== Test case 2.B: / on bcache (LVM) === | === Test case 2.B: / on bcache (LVM) === |