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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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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1answer
8 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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3answers
1k views

How stable is BTRFS in Ubuntu?

I see entries describing BTRFS on Ubuntu 12.04 has some concerns due mostly to the maturity of the BTRFS product. Now that we have 13.10 available, is the BTRFS file system reliable?
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1answer
179 views

Can I Recover The Files in the Directory /usr from a btrfs Snapshot?

Some time ago, I moved the folder /usr to its own partition. Before this it had lived in the / partition which has a btrfs filesystem. Accidentally, I formatted my /usr partition from my Windows XP ...
2
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1answer
106 views

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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0answers
20 views

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 ...
1
vote
2answers
78 views

Reflink cloning of LXC container on btrfs?

I use btrfs on my system and have created an LXC container with Xubuntu on it. Now I'd like to use that as a base for other containers. Since it's a btrfs, I can use cp --reflink to create a ...
2
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0answers
28 views

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 ...
1
vote
1answer
30 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 ...
5
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0answers
905 views

Ubuntu 14.04 bad taint on XFS and BTRFS

I've done a fresh install of Ubuntu 14.04 on a physical machine and a virtual machine and after the first reboot (and also at random times) on the screen I get a bad taint message for XFS and BTRFS ...
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0answers
179 views

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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0answers
270 views

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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0answers
24 views

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 ...
0
votes
1answer
89 views

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 ...
11
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2answers
3k views

How can I convert an ext4 partition to btrfs (or other file systems) without losing data?

I wish to convert my current /home partition to BTRFS (or other file systems) without losing data if possible, what steps should I take for this? is it safe?
0
votes
1answer
103 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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5answers
5k views

How do I recover a BTRFS partition that will not mount?

The installation for 12.04 kept failing, and the solution was to have the installer ignore the btrfs partition that I have previously been using for /home. Now that it's installed, I've been trying ...
0
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1answer
289 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 ...
0
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0answers
34 views

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 ...
0
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1answer
88 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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0answers
153 views

How to install ubuntu to a already encrypted partiton without formatting it in 14.04

Ubuntu killed the alternative installer buuuuuuh!! I am not sure but I think this was possible before with it. As far as I understand it the installer actually recreates a encrypted volume even if ...
0
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1answer
55 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. ...
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0answers
119 views

btrfs two Data sections and enospc error when trying to convert

I currently have a btrfs filesystem setup on an ubuntu 14.04 setup like this: # btrfs fi df /storage/ Data, RAID1: total=2.33TiB, used=2.32TiB Data, RAID0: total=2.00GiB, used=2.00GiB System, RAID1: ...
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0answers
76 views

Strange output of btrfs fi df after converting from RAID0 to RAID1

I just converted my 3 disk btrfs filesystem from RAID0 to RAID1 and balanced it. At first the data was all in the RAID0 filesystem, so running btrfs filesystem df showed something like this: (XX are ...
2
votes
1answer
2k views

btrfs: not enough free disk space, but device not fully used

I'm using btrfs for my home directory, which spans multiple devices. In total I should have around 7.3TB of space - and that's what df shows, but I ran out of space after using only 5.7TB of data: # ...
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votes
2answers
266 views

Ubuntu thinks btrfs disk is full but its not

cat /etc/fstab # <file system> <mount point> <type> <options> <dump> <pass> UUID=a168d1ac-4e13-4643-976d-6e47ea1732b1 /boot ext2 defaults ...
3
votes
1answer
2k views

btrfs and missing free space

I converted my ext4 partition to btrfs and deleted the save subvolume after doing so. Then I enabled the compression (lzo) of the filessystem in the fstab file and everything is correct so far. Then ...
5
votes
1answer
1k views

Grub fails to install - core.img 'unusually large' [closed]

When trying to resurrect my (t)rusty 'ol router who's system disk (CF card) had failed (probably because I neglected to tune Ubuntu properly for this type of media), I wanted to use the opportunity to ...
0
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1answer
585 views

Installing 14.04 Server to exisiting btrfs subvolume

I have an existing btrfs raid1 volume consisting of 4 disks. This already contains a few subvolumes of which I'm looking to install Ubuntu to one of. I've done the following: mount -o subvolid=0 ...
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0answers
301 views

ZFS vs btrfs on Trusty [closed]

I have been running Precise with ZFS on root for the last two years on a home file/media server and HTPC. I am looking at rebuilding the server using Trusty and I am wondering if I should be using ...
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0answers
143 views

Installing and booting Lubuntu on ReadyNAS with Btrfs

I have NetGear ReadyNAS Business Pro with 6 Place for 6 Disks I did a hack the box (basically it is a normal PC with Intel CPU) I upgraded the CPU and I used the ReadyNAS OS 6 (which is Debian ...
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0answers
84 views

Open multiple LUKS partitions at boot

I have a setup where I have 4 LUKS partitions that need to be mounted at boot time in order to assemble a RAID10 btrfs partition holding the root partition of my system. I was able to finalize the ...
4
votes
1answer
546 views

Filesystem Label Rename

I'm getting a strange error quark 11 on renaming my filesystems on Ubuntu 12.10 64. I'm sure 100% I've already done it in the past without issues using the disk utility. Maybe some recent upgrade or I ...
32
votes
5answers
3k views

How can I flip a single bit in a file?

I want to intentionally damage a file in order to test the claims that btrfs can heal itself. The article talks about taking the filesystem off, damaging a photo by "flipping" a single bit and then ...
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0answers
368 views

Problem with booting Ubuntu 14.04 from a btrfs partition

I have installed Windows 8.1 Update 1. After that I have installed Ubuntu 14.04 on a btrfs partition. However, after the restart there was no GRUB menu to choose from and the system booted directly to ...
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0answers
234 views

btrFS RAID5/6 Understanding space usage and usability

Im currently thinking about experimenting with btrfs with my workload in place of ext4. Right now I have a few drives on order. I want to setup btrfs on the first drive and slowly expand the FS ...
2
votes
1answer
366 views

Can't delete a btrfs snapshot

I can not delete the "apt-snapshot-release-upgrade-saucy-2013-10-19_00:52:26" btrfs snapshot. Here are the details: root@cioco:~# btrfs subvolume list -s / ID 261 gen 246 cgen 245 top level 5 otime ...
5
votes
2answers
797 views

Is there another way for me to backup /home/user other than creating a subvolume?

I think I'm having difficulty fully understanding subvolumes and snapshots. The /home partition is btrfs. I want to create a "backup" snapshot of /home/user (for example) but user has existed for ...
0
votes
0answers
22 views

Got a corrupt BTRFS partition, but is still usable, how to convert it to ext4? [duplicate]

I've got a corrupt btrfs partition, and also because of its low speed, I am thinking of 'converting' it to ext4, how can I convert a root partition from btrfs to ext4 without loosing the ability to ...
0
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0answers
91 views

Any chance of installing Ubuntu on existing bcache device formatted with btrfs?

I setup my system with btrfs as root file system to be able to install additional Linux systems later on (each with separate and small /boot partition) on separate subvolumes. Then I light-heartedly ...
2
votes
1answer
368 views

Is there a way to install 13.10 on btrfs and full disk encryption?

I like the fact that the default desktop Ubuntu installer only requires me to check a single checkbox in order to have a fully encrypted disk in the end (which is a requirement within our company, so ...
0
votes
1answer
187 views

btrfs - did I just turn RAID1 into RAID10?

I set up a btrfs partition using two 3 TB drives in RAID 1: $ mkfs.btrfs -m raid1 -d raid1 /dev/sdd /dev/sde $ mount /dev/sdd /media/media Copied a bunch of data onto the partition, with the ...
2
votes
1answer
432 views

Error on mounting BTRFS volume on Precise

I use a 12.04 (Precise) fully updated (kernel 3.2.0-58-generic x86_64). In other partitions, I installed the Ubuntu 14.04 Trusty (Alpha version) to try out. I can't boot into the Trusty system any ...
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1answer
100 views

Ubuntu server with btrfs root and confusion with the @ symbol in subvolume path

Please note the following commands: user@ubuntu:~$ sudo btrfs subvolume create /srv/audio Create subvolume '/srv/audio' user@ubuntu:~$ sudo btrfs fi show Label: 'BTRFS_STORAGE' uuid: ...
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votes
2answers
542 views

Does btrfs support per user quota?

If I move the /home/... folders to a btrfs partition, can I still enable per user quota? That is, each user should be able to use a limited amount of storage.
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votes
2answers
8k views

Which is better for a home media server: zfs or btrfs or LVM/md? [closed]

I'm looking at building a new home server and would like a flexible filesystem. Both btrfs and zfs are interesting. I want to be able to do soft raid and have flexible solution allowing me to expand ...
0
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0answers
126 views

Grub in 13.10 doesn't notice a btrfs root?

I'm using Ubuntu 13.10 (saucy) as my primary system and installed a daily version of trusty in a btrfs partition. For some reason my grub from 13.10 can't find that partition, even though it finds a ...
0
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2answers
130 views

Exclude hidden directories from subvolume/snapshot

I am using snapshots for backing up data of my @home subvolume. But I would like to backup the real important data (like all my files, which are in @home, but not hidden directories because I am not ...
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2answers
518 views

Using btrfs with bcache on /

I am using btrfs with bcache for / on Ubuntu 13.10. It's fast. Unfortunately, during normal boots the step "Scanning for btrfs filesystems" fails. To successfully boot I have to enter recovery mode ...
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2answers
113 views

Will Ubuntu 13.10 boot if I enable compression on / which is a btrfs volume

I installed Ubuntu 13.10 on btrfs and the installer created the following fstab: UUID=0eff8daf-5924-4a1f-922c-ec82ec594dc0 / btrfs defaults,subvol=@ 0 0 ...