| Install Instructions |
| |
| Btrfs uses libcrc32c in the kernel for file and metadata checksums. You need |
| to compile the kernel with: |
| |
| CONFIG_LIBCRC32C=m |
| |
| libcrc32c can be static as well. Once your kernel is setup, typing make in the |
| btrfs module sources will build against the running kernel. When the build is |
| complete: |
| |
| modprobe libcrc32c |
| insmod btrfs.ko |
| |
| The Btrfs utility programs require libuuid to build. This can be found |
| in the e2fsprogs sources, and is usually available as libuuid or |
| e2fsprogs-devel from various distros. |
| |
| The Btrfs utility programs also require libblkid (block device identification |
| library). This library is usually available as libblkid-dev or libblkid-devel. |
| |
| Building the utilities is just make ; make install. The programs go |
| into /usr/local/bin. The mains commands available are: |
| |
| mkfs.btrfs: create a filesystem |
| |
| btrfs: control program to create snapshots and subvolumes: |
| # mount a btrfs filesystem |
| mount /dev/sda2 /mnt |
| |
| # create a subvolume |
| btrfs subvolume create /mnt/new_subvol_name |
| |
| # snapshot of a subvolume |
| btrfs subvolume snapshot /mnt/default /mnt/snapshot_of_default |
| btrfs subvolume snapshot /mnt/snapshot_of_default \ |
| /mnt/snapshot_of_a_snapshot |
| |
| # list of the subvolumes |
| ls /mnt |
| default snapshot_of_a_snapshot snapshot_of_new_subvol |
| new_subvol_name snapshot_of_default |
| |
| # removal of a subvolume or a snapshot |
| btrfs subvolume delete /mn/snapshot_of_a_snapshot |
| |
| # look a the btrfs man page for further information |
| man btrfs |
| |
| btrfsck: do a limited check of the FS extent trees.</li> |
| |
| btrfs-debug-tree: print all of the FS metadata in text form. Example: |
| |
| btrfs-debug-tree /dev/sda2 >& big_output_file |
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