similar to: Two identical copies of an image mounted result in changes to both images if only one is modified

Hi What is the general state of btrfs RAID6 as of kernel 3.13-rc1 and the latest btrfs tools? More specifically: - Is it able to correct errors during scrubs? - Is it able to transparently handle disk failures without downtime? - Is it possible to convert btrfs RAID10 to RAID6 without recreating the fs? - Is it possible to add/remove drives to a RAID6 array? Regards, Hans-Kristian -- To

i am looking at using btrfs for a new project and i have a few questions:     * i have heard that as it currently stands Btrfs has some issues to be used as a Lustre file system; is he aware of the issues and any plans to address these and integrate Btrfs in to Lustre     * any plans to support native clustering on Btrfs     * on ZFS the ZIL is a separate device, any plans to implement a the

Hi list, I am using kernel 3.9.0, btrfs-progs 0.20-rc1-253-g7854c8b. I have a three disk array of level single: # btrfs fi sh Label: none uuid: 2e905f8f-e525-4114-afa6-cce48f77b629 Total devices 3 FS bytes used 3.80TB devid 1 size 2.73TB used 2.25TB path /dev/sdd devid 2 size 2.73TB used 1.55TB path /dev/sdc devid 3 size 2.73TB used 0.00 path /dev/sdb

Hello, We are using btrfs filesystems in our infrastructure and, at some point of time, they start refusing to create new subvolumes. Each file system is being quota initialized immediately after its creation (with "btrfs quota enable") and then all subfolders under the root directory are created as subvolumes (btrfs subvolume create). Over time, these subvolumes may also be

Hello all, I recently had a power failure and can no longer mount my /home directory. The harddrive has two BTRFS partitions: sda7(/) and sda8(/home). The / partition loads up just fine, but /home does not. I''ve tried btrfsck as shown below and I''ve included dmesg pertaining to btrfs. This is on ArchLinux and the software versions are as follows: btrfs-progs-unstable

Hello guys, i try to convert ext4 volume, but btrfs-convert show me error: "No valid Btrfs found on file unable to open ctree conversion aborted." Ubuntu 13.04 Kernel: 3.11 btrfs-progs git version 0.20-git20130822~194aa4a13 way to reproduce error: $ truncate -s 4G file $ mkfs.ext4 file #say yes to create fs on non block device. $ btrfs-convert file No valid Btrfs found on file unable

Hello list, i know what btrfs don''t support swap files. I read arch wiki and when i reading about systemd addon for auto create swapfile on btrfs, i invent the way, how create and using swap file, just see following sh code: swapfile=$(losetup -f) #free loop device truncate -s 8G /swap #create 8G sparse swap file losetup $swapfile /swap #mount file to loop mkswap $swapfile swapon

I created a 1TB RAID1. So far it is just for testing, no important data on there. After a reboot, I tried to mount it again # mount /dev/mapper/vg00-btrfsvol0_0 /mnt/btrfs0 mount: wrong fs type, bad option, bad superblock on /dev/mapper/vg00-btrfsvol0_0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or

Hey all, Just did a btrfs balance on a single device. Before the balance operation here is the df result: inglor@tiamat ~$ btrfs fi df /home Data: total=19.19GB, used=9.34GB System, DUP: total=32.00MB, used=4.00KB Metadata, DUP: total=896.00MB, used=227.98MB Then I issues a balance operation relocating the chunks across a single device: inglor@tiamat ~$ sudo btrfs fi balance /home [sudo]

I''ve just pushed out a new integration branch to my git repo. This is purely bugfix patches -- there are no new features in this issue of the integration branch. I''ve got a stack of about a dozen more patches with new features in them still to go. I''ll be working on those tomorrow. As always, there''s minimal testing involved here, but it does at least compile on

Hi, I wanted to create a new btrfs fs for my backups. When trying to mkfs.btrfs for that device, I''m getting "error checking /dev/loop2 mount status" With strace I see where the problem is: lstat("/dev/disk/by-id/ata-INTEL_SSDSA2M160G2GC_CVPO939201JX160AGN-par", 0x7fffa30b3cf0) = -1 ENOENT (No such file or directory) The problem is there is something missing

Does not load. Wondering if this should work or has been moved ? Thanks, Anand -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

Hello! Today I downgraded from Ubuntu''s APT repo "oneiric-proposed" (which brings some kernel 3.0.0-13) back to the standard repo "oneiric". Now I''m not able to mount my btrfs / and /home (both on the same partition) anymore: device fsid SOME-UUID devid 1 transid 84229 /dev/dm-0 parent transid verify failed on 77078528 wanted 83774 found 84226

I''m trying to compile the btrfs source code but I''m getting an error. Any suggestions? Thanks Joe [root@ol6 btrfs-progs]# uname -a Linux ol6.localdomain 2.6.39-400.17.2.el6uek.x86_64 #1 SMP Wed Mar 13 12:31:05 PDT 2013 x86_64 x86_64 x86_64 GNU/Linux [root@ol6 src]# git clone git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git Initialized empty Git repository in

Hi list! I recently butchered my filesystem, and I was wondering if anyone knows how to help. Problem: My filesystem is screwed up, and I can''t mount it at all right now. In the logs, the problem begins around 45s. Background: I''m running a 6x4TB RAID5 array using md. I have a few virtual machines using said array, and one of them is a btrfs storage server. I ran into some

I have accidently damaged the first block(s) of a btrfs partition and can''t mount it anymore. I can see that my data is still intact by running a command like: cat /dev/sda5 | hexdump -C | more Do any (experimental) tools exist which would allow me to recover the files? Thank you -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a

Hi, my btrfs "hangs" when doing a balance operation. I''m using a 3.7.1 kernel from opensuse: linux-opzz 3.7.1-2.10-m4 #11 SMP PREEMPT Fri Jan 11 18:04:04 CET 2013 x86_64 x86_64 x86_64 GNU/Linux and Btrfs v0.19+ I did a scrub which completed without errors. Then I tried "btrfs filesystem balance /" which work fine for the first 23 of 46 chunks, then ist stopped

I came across the tidbit that ZFS has a contract guarantee that the data read back will either be correct (the checksum computed over the data read from the disk matches the checksum stored on disk), or you get an I/O error. Obviously, this greatly reduces the probability that the data is invalid. (Particularly when taken in combination with the disk firmware''s own ECC and checksumming.)

Hi, the situation: Label: ''RootFS''  uuid: c87975a0-a575-405e-9890-d3f7f25bbd96     Total devices 2 FS bytes used 284.98GB     devid    2 size 311.82GB used 286.51GB path /dev/sdb3     devid    1 size 897.76GB used 286.51GB path /dev/sda3 RootFS created when sda3 was 897.76GB and sdb3 311.82GB. I have now freed other space on sdb. So I deleted sdb3 and recreated it occupying all

Hi, This left me puzzled for a while: 22:29 borg:/ # losetup /dev/loop1 /.B.disk 22:29 borg:/ # mount /dev/loop1 /B mount: /dev/loop1: can''t read superblock 22:29 borg:/ # blkid /dev/loop1 /dev/loop1: UUID="e19fe89b-cde3-4ccc-bc70-b759a57bd1c9" UUID_SUB="f29c6218-d040-4546-a227-4dd2d2142817" TYPE="btrfs" 22:29 borg:/ # losetup -d /dev/loop1 22:29 borg:/ #