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2
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1answer
189 views

/home “cleaned” during ubuntu 12.10 installation on btrfs

I had a seperate btrfs partition for my home directory in my old ubuntu instalation. I "upgraded" the installation by installing a clean system on my ext4 partition which got formatted and mounted as ...
1
vote
1answer
86 views

RAID 0 or btrfs on two SSDs?

I have two 500 GB SSD's, and I would like to combine the two in some way to have 1 250 GB NTFS partition, and 1 750 GB btrfs or ext4 partition. As far as I see, I have two options: the Intel Rapid ...
0
votes
1answer
52 views

How do I deal with BTRFS raid1 when usb disk device mappings changes?

I created a btrfs raid1 one by using "mkfs.btrfs /dev/sdc1 /dev/sdg1". It worked fine but next time I restarted my pc it seemed like the sdg device became sdf therefor btrfs refused to mount this ...
-1
votes
1answer
44 views

BTRFS or LVM heterogeneous RAID

I'm entertaining creating a largish (3.5TB+) backup server for my family. I already own enough hardware, and I don't want to buy any more right now. The config I envision look like this: Two 1TB ...
3
votes
0answers
389 views

Is it safe to resize a BTRFS partition that is part of a multi-device volume?

I have a multi-device BTRFS volume and I would like to re-size one of the partitions. To be more precise: My /home is spread across two separate BTRFS partitions. I shrunk down another partition to ...
2
votes
0answers
95 views

btrfs does not show drive as missing

I am trying out btrfs and I noticed some funny behaviour: I have two drives in a raid 1 configuration. sudo btrfs fi show Label: none uuid: 52b9c6f6-ce5c-4727-861e-e2fd012e475f Total devices 2 ...
2
votes
0answers
71 views

Btrfs snapshot space and time overhead

Using btrfs-snapshot-rotation, I've setup a system to rotate snapshots so that it always has snapshots of: Each of the the last 24 hours Each of the last 30 days Each of the last 12 months. This ...
2
votes
0answers
70 views

For raid1, does btrfs check which partitions are on the same device?

I have btrfs on two partitions using btrfs's raid1 mode: /dev/sda3 /dev/sdb3 Now I plan to run btrfs device add /dev/sda2 /dev/sdb2, so I'll have four partitions: /dev/sda2 /dev/sda3 /dev/sdb2 ...
2
votes
0answers
201 views

Replace Linux Boot-Drive | ext3 to btrfs

I've got a headless server running Debian Linux currently. Linux vault 3.2.0-3-686-pae #1 SMP Mon Jul 23 03:50:34 UTC 2012 i686 GNU/Linux The root filesystem is located on an ext3 partition on the ...
1
vote
0answers
133 views

Linux kernel 3.9 new storage features howto?

Linux kernel 3.9 has been released, which brings new features for storage cache devices (dm-cache), as well as BTRFS RAID 5/6. These features are undoubtedly sexy, but are all but completely ...
1
vote
0answers
197 views

Ubuntu 12.04: Does grub support multidevice boot from btrfs?

I'm using Ubuntu 12.04 LTS (Precise Pangolin) with grub 1.99. I installed on a RAID10 multidevice BTRFS partition. I thought that multidevice support had been included in grub for a while, but on ...
0
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0answers
45 views

Mirror / backup laptop btrfs drive to sometimes connected external USB disk

I have a laptop with an internal drive using btrfs. There are several subvolumes and snapshots on here. I want a copy of this drive to be made periodically to an external USB disk of approximately the ...
0
votes
0answers
17 views

How to figure out which partition number an entry in the list has in the Fedora 20 installation routine?

I started the Fedora 20 installation image which I dded onto an USB stick. During the installation I started wondering whether it really is impossible to determine the parition number or UUID of ...
0
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0answers
29 views

It is possible to minimize size of a btrfs sparse file with btrfs filesystem resize and truncate?

Motivation: Assume I have created an oversize sparse file with truncate -s 4T test.img, mounted it over a loop device and put inside 1M files with 100 GB size together. One can assume that btrfs put ...
0
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0answers
33 views

BTRFS multiple devices mix raid1 and raid0

Hi Consider the following use case: I have two disks same size (let's say 3TB each). Then create a btrfs filesystem using both devices. Now I want to have two subvolumes "idata" and "ndata". Where ...
0
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0answers
1k views

ext4 vs btrfs performance on SSD array

I am observing something that I cannot explain. I am trying to come up with a good filesystem configuration using HP P420i controller and SSDs. Out of curiosity I have tried BTRFS (still unstable so I ...
0
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0answers
21 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 ...
0
votes
0answers
94 views

Is it possible to convert a btrfs RAID5 to a RAID6 with the same disks without losing data?

How would I convert an existing RAID5 (single parity) btrfs setup to a dual parity RAID6 configuration given enough free available disk space, using the same disks, without swapping out data ? ...
0
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0answers
119 views

btrfs made linux kernal panic when i delete subvolume?

My environment is: VMware workstation 8 CentOS 6.3, kernel 2.6.32-279.el6.i686 Btrfs v0.19 Sorry i can't use the images for the panic because my reputation is low. Call Trace ? panic ? oops_end ? ...