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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How to hide btrfs devices in nautilus dynamicly

According to this question and answer: How to hide btrfs devices in nautilus? Is it possible to do this dynamically? Devices like /dev/sdc1 might not be the same on next boot, so a static ...
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221 views

How to remove a write-back EnhanceIO cache on root partition?

I accidentially created a write-back EnhanceIO cache for my root partition. I didn't know that Creating a writeback cache on root device is not supported. This is because the root device is ...
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386 views

SSD drive errors in dmesg but smartctl says all is ok

I am not extremely experience in SSD monitoring so not sure if there is an issue or not, but yesterday I noticed in dmesg a number of errors being generated from my root disk (/dev/sdb). These seem to ...
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211 views

Ubuntu does not boot successfully with btrfs root partition errors

I have a setup on my laptop in which there are three partitions relevant to Ubuntu: a ext4 /boot partition, a btrfs root partition on LUKS and a swap partition on LUKS. Sometimes, after an unclean ...
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75 views

Can somebody explain this changing `du` output?

Just tripped across a weird case of du. Putting arguments one way gives: $ du -s htdocs/.git/ feuerkraft/.git/ media/.git/ 40564 htdocs/.git/ 40740 feuerkraft/.git/ 204 media/.git/ Putting them ...
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How can I use Kernel 3.19 in 14.04 now?

So I'm rebuilding my storage server. For stability, I want to use Ubuntu server 14.04 LTS as the OS. However, I'm planning to use Btrfs with RAID 5, and this has been greatly improved in kernel 3.19. ...
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76 views

Why does my computer always need to scan for my btrfs partitions even though they are always in the same place?

I use btrfs for the / and /home partitions of my filesystem. All of the btrfs partitions I use are listed in the fstab, with the appropriate block devices, and their mounting configuration and ...
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152 views

Which subdirectories of / should have compression disabled in btrfs root filesystem?

Imagine you set up your root filesystem to be btrfs with Ubuntu 14.10 defaults (one subvolume for / and one for /home) and you want to compress and deduplicate as much as possible. Which directories ...
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496 views

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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1k views

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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270 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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582 views

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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1answer
376 views

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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52 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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258 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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237 views

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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5k 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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32 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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65 views

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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1answer
53 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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239 views

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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224 views

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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202 views

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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85 views

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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1answer
396 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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214 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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2answers
1k 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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1answer
328 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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1answer
3k 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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437 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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93 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 ...
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1answer
304 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 ...
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1answer
167 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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1answer
1k 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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362 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 ...
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1answer
161 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 ...
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1answer
631 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
2k 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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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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1answer
3k 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 ...
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629 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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2answers
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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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1answer
310 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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232 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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1answer
462 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, ...
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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
6k 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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594 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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620 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 ...