Displaying 20 results from an estimated 20000 matches similar to: "Question: How can I recover this partition? (unable to find logical $hugenum len 4096)"
2011 Oct 28
4
Unable to mount btrfs partition
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
2012 Aug 19
5
fail to mount after first reboot
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
2011 May 30
5
Damaged super block / fs root
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
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2012 Jun 05
13
New btrfs-progs integration branch
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
2011 Mar 06
4
Recovering "parent transid verify failed"
Hey,
I''d start by saying that I know Btrfs is a still experimental, and so
there''s no guarantee that one would be able to help me at all... But I
thought I''ll try anyway :-)
Few months ago I bought a new laptop and installed ArchLinux on it,
with Btrfs on the root filesystem... I know, it''s not the smartest
thing to do...
After a few month I had issues with my
2011 Aug 03
6
BTRFS partition won't mount
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
2011 Jan 22
32
Bug in mkfs.btrfs?!
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
2012 May 06
4
btrfs-raid10 <-> btrfs-raid1 confusion
Greetings,
until yesterday I was running a btrfs filesystem across two 2.0 TiB
disks in RAID1 mode for both metadata and data without any problems.
As space was getting short I wanted to extend the filesystem by two
additional drives lying around, which both are 1.0 TiB in size.
Knowing little about the btrfs RAID implementation I thought I had to
switch to RAID10 mode, which I was told is
2013 Feb 06
3
btrfs balance -> hang/crash
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
2012 Jan 13
5
Can't resize second device in RAID1
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
2011 Jun 06
2
Re: New btrfsck status
Chris Mason on 10 Feb 13:17:
> Excerpts from Ben Gamari''s message of 2011-02-09 21:52:20 -0500:
> > Over the last several months there have been many claims regarding
> > the release of the rewritten btrfsck. Unfortunately, despite
> > numerous claims that it will be released Real Soon Now(c), I have
> > yet to see even a repository with preliminary code. Did I
2013 Apr 30
13
WARNING: at fs/btrfs/free-space-cache.c:921 __btrfs_write_out_cache+0x6b9/0x9a0 [btrfs]()
Hello
On my HP Compaq dc5800 with Ubuntu 13.04 and their 3.8.0-19-lowlatency
kernel, I''ve got quite some kernel traces in the syslog. You can find
them below or at http://pastebin.com/bLXPBX67 (to avoid line breaks…).
These kernel traces all begin with:
WARNING: at fs/btrfs/free-space-cache.c:921
__btrfs_write_out_cache+0x6b9/0x9a0 [btrfs]()
Most of the time, it starts with:
Call
2013 Sep 05
9
btrfs-convert won't convert ext* - No valid Btrfs found on /dev/sdb1
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
2013 May 10
5
Btrfs balance invalid argument error
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
2011 Apr 01
15
btrfs balancing start - and stop?
Hi,
My company is testing btrfs (kernel 2.6.38) on a slave MySQL database
server with a 195Gb filesystem (of which about 123Gb is used). So far,
we''re quite impressed with the performance. Our database loads are high,
and if filesystem performance wasn''t good, MySQL replication wouldn''t
be able to keep up and the slave latency would begin to climb. This
though, is
2011 Jun 30
9
btrfs-progs: integration branch updated
After a reorganisation of patches, and sending a bunch of them to
Chris, I''ve also updated the integration branch to match that. It''s
available from:
http://git.darksatanic.net/repo/btrfs-progs-unstable.git/ integration-20110630
The shortlog of 17 patches in this branch beyond the ones I''ve sent
to Chris is below.
Hugo.
Andreas Philipp (1):
print parent
2013 Jun 20
10
Two identical copies of an image mounted result in changes to both images if only one is modified
Hi,
I''ve observed a rather strange behaviour while trying to mount two
identical copies of the same image to different mount points.
Each modification to one image is also performed in the second one.
Example:
dd if=/dev/sda? of=image1 bs=1M
cp image1 image2
mount -o loop image1 m1
mount -o loop image2 m2
touch m2/hello
ls -la m1 //will now also include a file calles "hello"
2013 Dec 09
5
Btrfs questions
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
2013 Oct 21
11
swapfile on btrfs, temporary solution for wiki
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
2012 Oct 27
7
How does btrfs behave on checksum mismatch?
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.)