Using the Btrfs Utility to make use of the entirety of a cloned disk
Hosted by FiftyOneFifty on 2013-04-17 is flagged as Explicit and is released under a CC-BY-SA license.
Tags: Btrfs,CloneZilla,"Btrfs Utility".
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Utilizing Maximum Space on a Cloned BTRFS Partition
- If you clone a disk to a disk, Clonezilla will increase (decrease) the size of each partition proportional to the relative size of the drives.
- I wanted to keep my / the same size and have no swap (new drive was SSD), so I did a partition to partition clone instead
- Created partitions on the new SSDs with a GParted Live CD, 12Gb root (Ext4) and the remainder for /home, (btrfs, because I planned to move to SSD from the start, and last summer only btrfs supported TRIM)
- After cloning /dev/sda1 to /dev/sdb1 and /dev/sda2 to /dev/sdb2 using Clonezilla, I inspected the new volumes with the GParted Live CD
- /dev/sdb2 had 40% inaccessible space, i.e., the usable space was the same size as the old /home volume
- GParted flagged the error and said I could correct it from the menu (Partition->Check) but btrfs doesn't support fsck, so it didn't work
- Tried shrinking the volume in GParted and re-expanding it to take up the free space, also didn't work.
- Discovered 'btrfs utility' and that it was supported by the GParted Live CD
- Make a mount point
- Mount the btrfs volume
sudo mount /dev/sdb2 /media/btrfs
- Use btrfs utility to expand the btrfs file system to the maximum size of the volume
sudo btrfs filesystem resize max /media/btrfs
- Unmount the btrfs volume
- Rechecked /dev/sdb2 with GParted, I no longer had inaccessible space
Comment #1 posted on 2013-04-25T12:32:10Z by pokey
Thanks for keeping the network alive, 5150, and for doing it with style. :)
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