Btrfs is a new copy on write filesystem for Linux aimed at implementing advanced features while focusing on fault tolerance, repair and easy administration. Initially developed by Oracle, Btrfs is licensed under the GPL and open for contribution from anyone.

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Is it advisable to install Ubuntu on btrfs or ext4? [closed]

I used to install ubuntu on ext4 but I heard about btrfs. Is it advisable to use it for Ubuntu installation? What are the pros and cons?
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btrfs is full, but only half a disk is really used [duplicate]

I see this: root@wm-bot:/var/lib# du -ksh /var/lib/mysql/ 2.0G /var/lib/mysql/ root@wm-bot:/var/lib# root@wm-bot:/var/lib# df -h df: `/public/backups': Stale NFS file handle Filesystem ...
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How to mount btrfs subvolume, it isn't working / mounting

I just did: # btrfs subvolume create /@srv then: # btrfs subvolume list / ID 257 gen 73 top level 5 path @ ID 258 gen 71 top level 5 path @home ID 260 gen 65 top level 257 path @srv And added to ...
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31 views

How to recursive delete btrfs snapshot?

How can I delete a snapshot that contain in itself other snapshots? The normal sudo btrfs subvolume delete will give a error.
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How to restore btrfs snapshot with out reboot?

If I make a btrfs snapshot of my / folder as described here, I can't roll back until I restart the PC, because I can't delete the old btrfs subvolume with btrfs subvolume delete @_baroot. It will ...
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Is it a good idea to restore a btrfs snapshot with rsync?

Is it safe to use rsync to restore a btrfs snapshot? Just to give a example rsync -ax /home/snapshot/my_user_folder /home/my_user_folder where /home is my home folder and /home/snapshot is my ...
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21 views

How to properly restore a btrfs snapshot?

My / and /home partitions of my Ubuntu 14.10 system are formatted with btrfs. What is the proper way to restore a snapshot I made with out using any third party software?
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64 views

create '@' like subvolume in another partition

I have /var/log as a btrfs filesystem in a separate partition from root. I'm using snapshots for update and will later rollback. # mount /dev/sda2 on / type btrfs (rw,relatime,ssd,subvol=@) ...
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Ubuntu not booting up after uninstalling Gnome desktop

I Have Ubuntu 14.10 installed on my machine. I installed Gnome desktop on top of that. But I didn't liked it so I uninstalled the Gnome desktop using the commands sudo ppa-purge ...
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Do I likely have a bad WD Red HDD? [duplicate]

upon install of a new WD Red HDD in my server I reboot and get the Ubuntu 14.04 loading screen of An error occurred while mounting /home. Brief description: Btrfs Raid 1 filesystem 4 existing disks ...
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51 views

btrfs naming conventions and best practices

What are commonly used naming conventions and best practices for btrfs? How are subvolumes and snapshots named? Where are they placed? Subvolumes within subvolumes good/bad/matter-of-taste/avoid? Any ...
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I am unable to mount my previous btrfs RAID 1 home directory on reinstall of Ubuntu server 14.04 (was using 14.10)

Update 2 I mounted as degraded to /home and something interesting happened: jake@DAVYJONES:~$ sudo mount -o degraded /dev/sdb1 /home jake@DAVYJONES:~$ sudo btrfs fi show Label: Home uuid: ...
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279 views

Does Ubuntu plan to move to btrfs as default filesystem?

Btrfs seems to have a set of useful features such us snapshots and is default in Opensuse and Suse.Fedora plans to move to it. Does Ubuntu plan to move to it? If not, why ?
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27 views

Why does mv refuse to work?

I am writing a small software in Java to act as a G.U.I for btrfs commands as a high school diploma project . I want to be able to take a snapshot and restore it in real time if I do a btrfs subvolume ...
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26 views

How to rsync a home folder

I have a btrfs snapshot of my home folder ( let's say my snapshot is in /home/dan/snap1) How can I use rsync to "rollback" to that snapshot and not mess up things?
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36 views

Can't rollback btrfs snapshot

I have a btrfs snapshot in /home/user1/snapshot of my home folder and I want to rollback, but mv /home/user1/snapshot /home doesn't work it will just move it in /home/snapshot. What should I do?
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Harddisk operations totally brings down my system respond time to its knees

I have massive system slowdowns during harddisk operations on my PC. My Firefox is responding slow, it gets to a extreme at times that it actually becomes a not responding program and greys out during ...
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29 views

Moving boot disc to another

I have Ubuntu 14.10 installed on a Corsair SSD but am becoming a little nervous at the increase of smart errors appearing from it. I am considering the purchase of a new SSD to take over the role but ...
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upgrade btrfs without upgrading kernel?

We're running ubuntu 14.04.4 LTS with 3.13.0-38-generic kernel and btrfs v3.12 I've read that a min version for btrfs of 3.14 is desirable. Due to one of our programs integrating with kernel we are ...
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grub-install fails during 14.04 install with btrfs on sda

I used the manual partitioning option in the Kubuntu 14.04.1 installer to make a btrfs partition on /dev/sda. Of course it leaves 1 MB free at the start of the disk and I verified this with ...
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22 views

Uncompressing btrfs drive

I know you can compress or recompress an entire drive during a defrag with -clzo or -czlib flag but is there a way to uncompress during a defrag? Like -cnone or something? Also does defrag compression ...
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Grub does not start anymore after removing a btrfs partition

I'm using Ubuntu 14.10. Consider the following setup: ubuntu@ubuntu:~$ sudo blkid /dev/sdb1: UUID="0dde146f-ebdc-472d-83a2-48104e23cb8f" TYPE="swap" PARTUUID="00061e41-01" /dev/sdb5: ...
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Mounted btrfs will [not] compress?

I have a partition formated to btrfs and im willing to store there stuff that I don't use that often but which I need fast access from time to time (some dumps of my PS2 games for now) because I have ...
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Why is my read speed limited to 40 MB/s (< 25 %) reading from ext4 when compress-force is zlib and there's no CPU usage?

I'm moving data from an ext4 filesystem on a HDD connected with USB 3.0 which usually reads and writes with 170 MB/s to a btrfs subvolume on a SSD which usually reads and writes with 360 MB/s with ...
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Mount and access similar BTRFS filesystem

Say that I duplicated a disk to a new disk (using dd or similar), and have been using the new disk for a while. But, then I decide I want to view a file or files on the old disk quickly, specifically ...
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279 views

Ho to make btrfs snapshot in Ubuntu 14.10?

I have installed Ubuntu 14.10 with the / partition as btrfs, I want to make a snapshot of the subvolume /home occasionally. How to I proceed?
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changing root ssd with btrfs data array

I have a Corsair 120GB SSD holding my Ubuntu OS and three 3x 3TB disks in a BTRFS RAID1 configuration holding everything else including home, photos, music, etc. I may need to replace my SSD for ...
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106 views

Deleted Items not appearing in Trash folder. Stuck in .TRASH-1000

I have a three 3TB discs in a BTRFS RAID 1 configuration mounted at /mnt/btrfs on my machine. There is a symlink at /btrfs. There are a number of subvols within this, /archive /backups /games /home ...
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532 views

How can I get rid of “scanning for btrfs filesystems” at start-up?

When I start up my computer, it says: "scanning for btrfs filesystems". I do need the btrfs-tools, but my btrfs filesystems are on a removable disk which is disconnected at start-up. Scanning for ...
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Is it correct behavior if badblocks destroys the partition table if invoked with -n option/in non-destructive mode on a device file?

I'm having trouble to believe that badblocks didn't destroy my partition table (help for restauration shall not be the issue here), so this question came up. There's been one btrfs partition on the ...
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Weird “btrfs” item in bootchart without having any bootchart partition

I've bound two weird items in the bootchart: https://public.v6ak.com/bootchart-btrfs-ntb-precise-20140918-3.png There is "btrfs" and "btrfsctl". It seems that other processes are delayed after the ...
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283 views

Btrfs subvolume @home not mounted kernel upgrade 3.17

i'm having trouble upgrading my kernel to the latest 3.17 rc3 mainline kernel. I'm currently on a patched kernel 3.13 for my Acer chromebook c720p, the 3.17 kernel would give me support for touchpad ...
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571 views

How to reformat my SD card?

I have a micro SD card (/dev/mmcblk0) with one partition on it (/dev/mmcblk0p1). There is a btrfs filesystem on it, that won't mount. When I insert it, I get an error message on the desktop, saying: ...
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Is there anything that ext4. btrfs, or F2FS can do for a usb3.0 thumb drive that fat does not do? [closed]

I don't particularly care about cross platform. I have a thumb drive, and what to know if there is anything to gain from formatting it to ext4, btrfs, or f2fs. Thanks
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Multiple Independent BTRFS Volumes

I have 4 x 2 TB drives. I want to set up one pair as a BTRFS RAID 1 volume, which I have done. I want to set up the second pair as a RAID 0 data, RAID 1 metadata volume, which I have not been able to ...
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Cannot delete encrypted btrfs snapshot

I created a btrfs snapshot some time ago and now I want to delete it, as it appears to be taking up a lot of space. When I list snapshots, I get: 11:59:16::root@pounamu::/mnt ↪ btrfs subvolume ...
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67 views

How to set USER_SUBVOL_RM_ALLOWED capability?

I try to remove btrfs snapshot as a normal user. I've read, that a user needs to have some special capability/right set: USER_SUBVOL_RM_ALLOWED. How to grant such capability to user??
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Why is btrfs slower than ext4, and why would I want to use it in an ubuntu install? [closed]

At this time (August 2014); having been following the benchmarks for btrfs on Phoronix,(http://www.phoronix.com/scan.php?page=home) and have been seeing on the aggregate; slower performance than ext4; ...
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BTRFS cannot delete snapshot - operation not permited

I cannot delete a the btrfs subvolume "2014-07-28" which is a snapshot of the "@" created by the kubuntu installer to serve as the kubuntu root. teneighty@teneighty-MS-7924:/$ sudo mount -o ...
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How can I prune my BTRFS backups?

I have a BTRFS backup system where I take daily snapshots (btrfs subvolume snapshot) and serialize them into incremental change files based off the previous days backup (btrfs send -f backup.date ...
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329 views

Are re-combined BTRFS incrementals identical to the original?

I have several systems running btrfs, and I'd like to use the btrfs subvolume send/receive features as a backup solution. I want to send daily incrementals to remote as efficiently as possible. That ...
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how to disable 'scanning btrfs filesystem' at system startup

After upgrading from Ubuntu 12.04 to Ubuntu 14.04, I get a message "scanning for btrfs file systems" at starting-up. I don't have any BTRFS filesystem. It delays the booting for about 15 seconds. I ...
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How to get rid of the “scanning for btrfs file systems” at start-up?

At start-up, I see the message Scanning for btrfs file systems. How can I get rid of it? I have tried to remove the package with sudo apt-get purge btrfs-tools, but it just shows a blank screen ...
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Recover a mbox file from a overwritten btrfs partition

I had 14.04 on a hard drive using btrfs as the file system. One morning, the file system randomly failed and I couldn't boot into it anymore. I loaded up a live CD and extracted all the files I needed ...
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How to use UUIDs in fstab for configuring btrfs RAID1

This is similar to this question, but the solution there was to choose the disks using "device=/dev/sda1,/dev/sdb1", which is not as robust as using UUIDs. I'm sure it can be done, but I can't find ...
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300 views

Install Kubuntu with btrfs

I don't have much space on the hard drive, so I was considering using btrfs for my hard drive. I'm aware that btrfs is not stable yet, but I'm interested in installing Kubuntu with it anyway. How can ...
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2k views

btrfs for deduplication and compression at the same time?

I'm thinking about using btrfs functions for both deduplicate and compress my storage... My question is: is it efficient? I mean, does it deduplicate AND compress at the same time efficiently?! I'm ...
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Install on a large btrfs partition with two sub volumes

I have a computer with a large btrfs partition containing two sub volumes / and /home. They are both compressed. There's also a separate swap partition. the /home partition has data on it and I hoping ...
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216 views

Delete snapshot make filesystem read-only

I am using Btrfs 3.12 and each time i delete a snapshot, the entire btrfs volume become "Read only". So i umount it and try a btrfsck --repair But every time it failed on this line: Extent back ...
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133 views

Btrfs snapshot marked as deleted

I am using Btrfs v3.12 and each time I delete a snapshot it is not deleted, marked as "DELETED" but the global size of the volume doesn't change. I have never seen that in older version of BTRFS. ...