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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287 views

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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0answers
67 views

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 ...
0
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1answer
189 views

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 ...
0
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1answer
82 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??
2
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1answer
915 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
185 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 ...
3
votes
1answer
103 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
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1answer
401 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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1answer
968 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
1k 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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50 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 ...
2
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1answer
2k 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 ...
0
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1answer
361 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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1answer
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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0answers
50 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
240 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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1answer
152 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
315 views

btrfs two Data sections and enospc error when trying to convert

I currently have a btrfs filesystem 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: total=32.00MiB, ...
6
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1answer
2k 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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3answers
2k 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 ...
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0answers
475 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 ...
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0answers
391 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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1answer
1k 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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2answers
289 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 ...
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1answer
2k 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 ...
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0answers
23 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 ...
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1answer
914 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
534 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 ...
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1answer
2k 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
164 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
16k 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 ...
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2answers
323 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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4answers
3k 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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5answers
4k 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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2answers
3k views

How to create an external selfhealing btrfs USB HDD RAID 1 array?

The hardware is an external 2TB bus powered USB disk. What I want is a RAID1 setup of 2x 1TB btrfs. Is this possible? How? __ Motivation The motivation for me to use RAID1 btrfs is because I ...
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2answers
142 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 ...
0
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1answer
366 views

How to mount Btrfs with “errors=remount-ro” equivalent?

Btrfs does not appear to support errors=remount-ro. In /etc/fstab, what option can I use with Btrfs to achieve equivalent result as "errors=remount-ro"?
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1answer
345 views

btrfs mount options not working

I'm running Ubuntu 12.04.3 LTS I converted my data drives with btrfs. I first did apt-get update before installing btrfs-tools. Unfortunately, that still only installed version 0.19 I can mount the ...
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4answers
331 views

My approach for replacing current Ubuntu with newer

I'm working on Ubuntu 13.04 currently. I want to replace it with Ubuntu 13.10. For the same, please approve whether my approach mentioned below is right! I have created a bootable usb stick having ...
2
votes
2answers
703 views

Can I have two distros on the same partition using btrfs?

I'm using btrfs successfully and have luckily separate home and system partitions. Using Ubuntu 13.10 and wanting to test 14.04, how can I do this using the btrfs file system? The system has an EFI ...
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2answers
832 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 ...
2
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1answer
154 views

Missing 50GB on my 100Gb harddrive

I have a 128GB harddrive formatted with the btrfs. However, for some reason I'm missing around half of the disk space. Do any of you have any idea of how to fix it? See this screenshot for details ...
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1answer
1k views

Installing Ubuntu on btrfs over multiple drives

When I installed Ubuntu 13.04, I managed to combine a couple of outdated askubuntu answers, as well as some of the btrfs documentation in order to figure out how to install Ubuntu over two SSDs using ...
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1answer
590 views

Boot existing ubuntu installation on uefi, GPT BTRFS

I have looked through many of the questions, and haven't found anything that quite satisfies this problem. I have an ssd hard drive that is bootable from my old computer. It is a standard BIOS, ...
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2answers
1k views

How can I install Ubuntu Saucy Server with BTRFS?

So, a week ago I installed the latest beta version of Ubuntu Saucy Server in a MacMini using BTRFS as only partition to mount / on it (I know it's not recommended to do this, but it's not the point ...
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votes
2answers
1k 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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0answers
29 views

Btrfs fsck running on boot every time? [duplicate]

I've read some stuff that says that Btrfs fsck is run every time on bootup. Is this still true? If so how can you tell when it runs or does not run on bootup? I just installed Ubuntu Raring Ringtail ...
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1answer
441 views

Use IOzone to check read/write performance of ext4 and btrfs?

Can someone help me to use IOzone filesystem benchmark tool on Ubuntu to check the performance of ext4 and btrfs filesystems? I have installed Ubuntu into a VM.
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2answers
4k views

Creating btrfs subvolume like @ or @home

Being intrigued by btrfs I decided to toy around with it in a VM. Installation works great as long as I remember to put /boot on a separate partition and it all seems to work fine. What I would like ...
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vote
1answer
2k views

Moving a subvolume to another drive

I'm trying to move my root subvolume to another drive. I've booted into a live disc, ran "cp -a /mnt/sdb/@ /mnt/sda", fixed my FSTAB, and reinstalled grub. However when I boot up I can see that both ...