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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Error while starting ubuntu 15.04

After i have upgraded my Dell Latitude E5540 to Ubuntu 15.04 i have the following upon booting up ! Scanning for Btrfs filesystem [FAILED] Failed to start Load Kernel Modules. See "systemctl status ...
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How to install Ubuntu Desktop on XFS or BRTFS using automatic partitioning?

Currently, when install Ubuntu Desktop, and by choosing automatic partition for a brand new hard drive, there is no way to select which file system will be used for it. It auto-selects EXT4 and the ...
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1answer
29 views

What's the best way to try newer versions?

I'm running Ubuntu 14.04 LTS in two computers. One is the desktop version, my alternate (and almost) everyday computer, and a second server (headless) version.Eventually the server will be a ...
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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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1answer
22 views

Is there a way to use badblocks with btrfs?

I have a hard drive with bad sectors that I've found using badblocks and whatever Windows uses. I have Lubuntu installed on btrfs, and it's running smoothly for now (where Windows would freeze up), ...
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274 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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Tried to delete files; disappeared from home folder, but did not appear in Trash (Btrfs)

I deleted some files from my home folder that added up to about 50GB. They did not go to my Trash, but are no longer in the home folder. I still have the same amount of disk space remaining as I did ...
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3answers
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2015: Is BTRFS stable?

I know, questions like this have been asked before, but I'd like to get some up to date experiences.. From what I've read in various discussions, BTRFS seems like it's relatively stable, but once in a ...
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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
68 views

How to list compression ratio on compression enabled btrfs?

I enabled compression on a btrfs volume. Now how do I know the compression ratio of files or directories? Or at least the overall stats?
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93 views

BTRFS on Ubuntu 14.04.3

I know, I know, I know. Bear with me. BTRFS is listed as stable now (wiki page updated Nov of 2015) https://btrfs.wiki.kernel.org/index.php/Main_Page#Stability_status The filesystem disk format ...
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1answer
32 views

Can I get SSD rw performance while keeing data security if I combine SSD & HDD in RAID1

I have 2 storage devices; classical slow HDD( 750GB, /dev/sda ) and faster SSD( 128GB, /dev/sdb ). Currently I have installed Ubuntu & Mint on same btrfs partition on SSD ( /dev/sdb5 ). My btrfs ...
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Upgrading btrfs-progs

I am running Ubuntu Server 14.04 LTS and have setup a btrfs RAID 10 volume with 6 member drives for storing data. I've additionally set it up so that btrfs scrub runs every week using cron so that the ...
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25 views

grub fails to find btrfs-filesystem after adding new devices

Having my server (Ubuntu 15.04) equipped with two 1TB HDDs in raid1, I added yesterday two new 4TB HDDs. After adding those with btrfs device add ... I rebalanced the system with btrfs balance ...
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2answers
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How can I deduplicate my data with BTRFS?

I have installed Lubuntu 15.04 on my EEE PC 701 with the file-system BTRFS. I want to deduplicate my data, but I don't know how.
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1answer
51 views

Boot to Btrfs snapshot in Ubuntu

OpenSuse recently implemented an GRUB entry that allows you to boot directly into a previous Btrfs snapshot of your root. Is there any way of bringing it to my Ubuntu installation? Such feature would ...
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How to rollback btrfs snapshot not at the top of the btrfs tree

(I may be using the wrong terms in this question, but I'm trying to use the terminology in the linked page.) The ubuntu wiki explains how to rollback a snapshot that is located at the top of the ...
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1answer
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How do I convert from RAID1 to JBOD with btrfs?

I have the following RAID1 btrfs set: Label: none uuid: 87595481-7b5c-464e-b10d-d9b2b0852e11 Total devices 4 FS bytes used 4.77TiB devid 1 size 2.73TiB used 2.63TiB path /dev/sdb ...
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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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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
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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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4answers
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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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Ubuntu 14.04 bad taint

Any body got the solution for the below question? please share it. I couldn't add comment ,so i created new question here. Ubuntu 14.04 bad taint on XFS and BTRFS Problem: I have installed Ubuntu ...
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btrfs kenel error

getting some kernel error while mounting btrfs for remove the missing devices. Oct 19 07:31:57 backup kernel: [ 1883.691633] ------------[ cut here]------------ Oct 19 07:31:57 backup kernel: [ ...
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2answers
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Block-level deduplicating filesystem

I'm looking for a deduplicating copy-on-write filesystem solution for general user data such as /home and backups of it. It should use online/inline/synchronous deduplication at the block-level using ...
0
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1answer
60 views

How to start services only after BTRFS filesystem has been mounted?

I've been trying to make some services only start after a BTRFS system gets mounted, with no success. I have the following in my service start/stop script: # Required-Start: $local_fs $remote_fs ...
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1answer
165 views

Error removing an HDD from a RAID1 BTRFS array

I setup a btrfs filesystem on 3 disks with RAID 1. Somehow, a small portion (2GiB) got used as RAID0. At the time, no amount of running btrfs balance -dconvert raid1 -mconvert raid1 would change it so ...
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btrfs partition won't mount after upgrading 64bit Ubuntu 11.10 laptop

I have tried many ideas from the net, but none of them work. This looks correct and in good order **sudo btrfs filesystem show /dev/sda2** failed to read /dev/sr0 Label: none uuid: ...
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1answer
94 views

How do I find out which driver version of BtrFS I am using?

I was reading through a couple of BtrFS articles online. Sometimes I saw statements like Do not use BtrFS versions older than 0.20rc1. How can I find out which version is in my Kernel?
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2answers
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How to change btrfs partition label/uuid?

I upgraded to a new harddisk by using dd to copy the partition. As the old disk is still in place, the computer seems to randomly boot one or another. To fix this I thought, changing the UUID/LABEL of ...
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2answers
136 views

Is it safe to delete apt-snapshot-*?

I think I did a mistake when I decided to use Btrfs. I am not using any of its features, but now have troubles with not enough space. I did sudo btrfs balance start / -v as suggested in some ...
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125 views

BTRFS RAID6 array is broken, how do I fix it?

My Btrfs raid 6 array seems to be broken. When try to mount it I get the following error message. I don't know how or why it broke maybe a power outage or something (it happened during my vacation). ...
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59 views

Install Ubuntu on Btrfs Raid1 pool

I have seen the post Installing Ubuntu on btrfs over multiple drives, but the solution suggested there does not help me. Before using Btrfs in a production environment I wanted to give it a try in ...
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115 views

LUKS + LVM at Install Time

I am trying to use the Ubuntu 14.04.3 LTS installer to create a disk layout that logically looks like this during installation: /dev/sad | +-- /dev/sda1 (/boot) | +-- /dev/sda2 (LUKS) ...
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How to create a snapshot of an encrypted btrfs @home subvolume?

We are using btrfs for its snapshot capabilities so we can backup user home directories. The user home directories are encrypted with encryptfs. We run sudo btrfs subvolume snapshot /home ...
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ext4 to btrfs conversion: how long can it take? space requirements?

I started btrfs-convert for my ext4 partitioned hdd. I did a fsck first which was fine. So since it is running over 4 hours now (1.) I wonder if it will ever finish ? I read multiple articles ...
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1answer
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btrfs - Need help understanding it correctly

After spending hours and hours i cannot manage to understand btrfs enough to use it the way i want. In the end my goal is simple: Having a clean fail-proof solution for os upgrades. So i've exactly 3 ...
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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
181 views

Unable to mount secondary BTRFS filesystem to specific subvolume

So I'm trying to wrap my head around BTRFS and set up my fileserver using BTRFS filesystems. Here is my setup: /dev/sda1 : BTRFS filesystem, contains @, @home subvolumes mounted to / and /home. ...
2
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1answer
101 views

btrfs: Resultant copy is twice the size of source

I just got an SSD and wanted to migrate my current Ubuntu installation to take advantage of its performance. So I booted to an Ubuntu live CD, mounted source (ext4) and target (SSD, btrfs mounted ...
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1answer
133 views

Error “Unknown unclaimed register before writing to 4a000” after scanning for btrfs filesystem

I had upgraded Ubuntu from 12 to 14 version. I have "scanning for Btrfs filesystems" before starting up, and then I've got error "Unknown unclaimed register before writing to 4a000". How can I fix it. ...
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10answers
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Trick installer to use btrfs root with compression

I want to install Maverick onto a BTRFS root partition. Not for fun or testing, but because I need compression due to a small flash disk (4GB). Now the 10.10 installer finally supports btrfs, but ...
0
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1answer
101 views

How to mount BTRFS filesystem via CLI with switches defaults,noatime,commit=300,autodefrag

I have ubuntu on a 32GB USB2 flash stick that I carry around with me, it works fine booting on other machines I have to sometimes access. Recently I added a volume that contains a lot of data (a ...
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1answer
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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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Scanning for BTRFS files systems

After upgrading from Ubuntu 14.04 to a point release, I get a message "scanning for btrfs file systems" at start-up. I presently do not have any drives with BTRFS, (am considering it potentially for a ...
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1answer
611 views

Raid 6 on btrfs in Vivid

Hi I'm trying to make a Raid 6 on multiple drives in Ubuntu 15.04, Btrfs is already running on 4 in raid10 when I do sudo btrfs balance start -dconvert=raid6 -mconvert=raid6 /mnt/storage/ it ...
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Which btrfs features are stable? How to know?

with the adaption of Btrfs by SuSe, Oracle and Facebook Btrfs has prominent support. The question appears to shift from "is btrfs stable for production" to "which set of btrfs-features are stable ...
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How do I setup JBOD by installing Lubuntu?

I want to setup JBOD (Just a Bunch Of Disks) with Btrfs on Lubuntu 15.04.
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1answer
242 views

How do I setup software RAID 0 or JBOD with BTRFS?

I've a 4GB SSD drive which is BTRFS formatted and is running Lubuntu 15.04 and a 8GB SD card (which I've always inserted) formatted as BTRFS. I want to setup software RAID 0 or JBOD, so I've more ...