Site Map - skip to main content

Hacker Public Radio

Your ideas, projects, opinions - podcasted.

New episodes every weekday Monday through Friday.
This page was generated by The HPR Robot at


hpr1228 :: Utilizing Maximum Space on a Cloned BTRFS Partition

Using the Btrfs Utility to make use of the entirety of a cloned disk

<< First, < Previous, , Latest >>

Thumbnail of FiftyOneFifty (R.I.P.)
Hosted by FiftyOneFifty (R.I.P.) on 2013-04-17 is flagged as Explicit and is released under a CC-BY-SA license.
Btrfs, CloneZilla, Btrfs Utility. 1.
The show is available on the Internet Archive at: https://archive.org/details/hpr1228

Listen in ogg, spx, or mp3 format. Play now:

Duration: 00:16:41

general.

Utilizing Maximum Space on a Cloned BTRFS Partition

by FiftyOneFifty

  1. 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.
    1. 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
    2. 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)
  2. 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
    1. /dev/sdb2 had 40% inaccessible space, i.e., the usable space was the same size as the old /home volume
    2. 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
    3. Tried shrinking the volume in GParted and re-expanding it to take up the free space, also didn't work.
  3. Discovered 'btrfs utility' and that it was supported by the GParted Live CD
    1. Make a mount point
      • sudo mkdir /media/btrfs
    2. Mount the btrfs volume
      • sudo mount /dev/sdb2 /media/btrfs
    3. Use btrfs utility to expand the btrfs file system to the maximum size of the volume
      • sudo btrfs filesystem resize max /media/btrfs
    4. Unmount the btrfs volume
      • sudo umount /dev/sdb2
  4. Rechecked /dev/sdb2 with GParted, I no longer had inaccessible space

Comments

Subscribe to the comments RSS feed.

Comment #1 posted on 2013-04-25 12:32:10 by pokey

Nice one

Thanks for keeping the network alive, 5150, and for doing it with style. :)

Leave Comment

Note to Verbose Commenters
If you can't fit everything you want to say in the comment below then you really should record a response show instead.

Note to Spammers
All comments are moderated. All links are checked by humans. We strip out all html. Feel free to record a show about yourself, or your industry, or any other topic we may find interesting. We also check shows for spam :).

Provide feedback
Your Name/Handle:
Title:
Comment:
Anti Spam Question: What does the letter P in HPR stand for?
Are you a spammer?
What is the HOST_ID for the host of this show?
What does HPR mean to you?