Displaying 20 results from an estimated 20000 matches similar to: "Best Practice - Partition, or not?"
2011 Apr 09
16
wrong values in "df" and "btrfs filesystem df"
Hallo, linux-btrfs,
First I create an array of 2 disks with
mkfs.btrfs -d raid0 -m raid1 /dev/sdb1 /dev/sdd1
and mount it at /srv/MM.
Then I fill it with about 1,6 TByte.
And then I add /dev/sde1 via
btrfs device add /dev/sde1 /srv/MM
btrfs filesystem balance /srv/MM
(it run about 20 hours)
Then I work on it, copy some new files, delete some old files - all
works well. Only
df
2013 Jan 03
33
Option LABEL
Hallo, linux-btrfs,
please delete the option "-L" (for labelling) in "mkfs.btrfs", in some
configurations it doesn''t work as expected.
My usual way:
mkfs.btrfs -d raid0 -m raid1 /dev/sdb /dev/sdc /dev/sdd ...
One call for some devices.
Wenn I add the option "-L mylabel" then each device gets the same label,
and therefore some other programs
2013 Jan 05
2
BUG btrfs fi show displays stale btrfs volume
I''ve filed this bug under util-linux, because I think wipefs isn''t deleting all btrfs metadata it could. But ultimately it appears to be a btrfs bug because nothing else sees the stale volume.
https://bugzilla.redhat.com/show_bug.cgi?id=889888#c15
btrfs-progs-0.20.rc1.20121017git92d9eec-1.fc18.x86_64
e2fs-progs-1.42.5-1.fc18.x86_64
kernel 3.7.1-2
Brand new 80GB virtual disk,
2013 Feb 12
11
What can I do to make btrfs work?
Btrfs has been broken for me for ages. I first reported it on this
list 5 months ago[1]. Below is a very simple reproducer that anyone
can run.
*NB* before you run this, adjust /dev/sda & /dev/sda1 to point to an
unused block device!
----------------------------------------------------------------------
#!/bin/sh -
set -e
while true; do
parted -s -- /dev/sda mklabel msdos
parted -s --
2012 Feb 13
23
Set nodatacow per file?
Hello,
is it possible to set nodatacow on a per-file basis? I couldn''t find
anything.
If not, wouldn''t that be a great feature to get around the performance
issues with VM and database storage? Of course cloning should still
cause COW.
Thanks,
Ralf-Peter
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2011 Feb 17
7
Re: [Bugme-new] [Bug 29302] New: Null pointer dereference with large max_sectors_kb
(switched to email. Please respond via emailed reply-to-all, not via the
bugzilla web interface).
On Thu, 17 Feb 2011 13:20:20 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=29302
>
> Summary: Null pointer dereference with large max_sectors_kb
> Product: IO/Storage
> Version: 2.5
> Kernel
2011 May 12
4
btrfs device scan
I have a couple computers running 2.6.38
(Ubuntu Natty 2.6.38-8-generic), and on both of them
"btrfs device scan" comes back with nothing other than
"failed to read /dev/sr0"
One computer has a btrfs RAID-1 volume, and the other has two separate
btrfs filesystems. The results are the same whether the filesystems are
mounted or not.
Why is "btrfs device scan" not
2013 May 03
3
[PATCH] xfstests: unmount scratch mnt in test 307
So if you have a mount command that doesn''t use /etc/mtab then it will spit out
a different device for the mounted device. So say we have
SCRATCH_DEV_POOL="/dev/sda /dev/sdb /dev/sdc"
we will turn this into
SCRATCH_DEV="/dev/sda"
SCRATCH_DEV_POOL="/dev/sdb /dev/sdc"
and then when you mkfs this you do _scratch_mkfs $SCRATCH_DEV_POOL which turns
into this
2010 Nov 01
3
btrfs benchmark with 2.6.37-rc1
Here is a small btrfs vs. ext4 benchmark with kernel 2.6.37-rc1.
compilebench with options -i 10 -r 30 on 2.6.37-rc1
btrfs
==========================================================================
intial create total runs 10 avg 73.11 MB/s (user 0.34s sys 1.96s)
create total runs 5 avg 49.53 MB/s (user 0.41s sys 1.62s)
patch total runs 4 avg 22.13 MB/s (user 0.09s sys 1.79s)
compile total runs
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
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
2010 Nov 09
2
time for "balance"
Hallo, linux-btrfs,
I''m working with btrfs for some days.
btrfs-progs-20101101, kernel 2.6.35.8 (both self compiled).
First step:
mkfs.btrfs /dev/sdd1
mount /dev/sdd1 /srv/MM
for a 2 TByte partition, worked well.
Copying about 1,5 TByte data to this partition worked well.
Second step:
btrfs device add /dev/sdc1 /srv/MM
btrfs filesystem balance
2012 Dec 27
4
problems with dracut mounting subvols
I've just tried putting usr in a subvol. Installation proceeds normally, no errors, but I'm dropped to a dracut prompt which indicates mount of /usr failed. dmesg follows:
[ 14.025215] systemd[1]: Starting dracut initqueue hook...
[ 14.077890] Btrfs loaded
[ 14.129987] device label fedora_f18v devid 1 transid 31 /dev/sda1
[ 14.313607] device label fedora_f18v devid 1 transid 31
2013 May 13
7
Remove a materially failed device from a Btrfs "single-raid" using partitions
Hello,
I am on Ubuntu Server 13.04 with Linux 3.8.
I''ve created a "single-raid" using /dev/sd{a,b,c,d}{1,3}. One of my hard
drives has failed, I mean it''s materially dead.
:~$ sudo btrfs filesystem show
Label: none uuid: 40886f51-8c9b-4be1-8721-83bf5653d2a0
Total devices 5 FS bytes used 226.90GB
devid 4 size 37.27GB used 31.01GB path /dev/sdd1
2009 Jun 11
4
[BUG] Cannot Mount Btrfs Volume Created By mkfs.btrfs v0.18-26-g0030f1d
Hi,
I try to format a USB memory with a Btrfs. I can format it with
mkfs.btrfs without problems. But; when I try to mount it, it fails to
mount with the below error messages. But the USB memory works fine with
other filesystems (ext4, XFS etc.). So, the hardware is not faulty.
tarkane@tarkane:~$ sudo mkfs.btrfs -d single -n 4096 /dev/sdb1
WARNING! - Btrfs v0.18-26-g0030f1d IS EXPERIMENTAL
2012 Aug 19
5
How to get Btrfs on 2nd partition of USB HDD to automount as read/write
Hello,
The question below is based on
https://lists.ubuntu.com/archives/xubuntu-users/2012-
August/004509.html
Thanks in advance for any help with the following question,
including pointing me to some other info resource if needed.
I have a user with an Xubuntu 12.04.1 laptop, 32-bit. He needs to
use a USB hard disk drive which has 2 partitions: the 1st
partition is NTFS and the 2nd
2008 Aug 02
3
crash when mounting
Hi guys,
I was playing on vmware with btrfs on complete disks /dev/sd{b,c,d,e}.
Next I decided to use partitions, so I created /dev/sd{b,c,d,e}1 and
used those, worked fine! Afterward, I mistakenly re-ran an old command
on the full disk ( mount -t btrfs -o subvol=. /dev/sdb /mnt/ ) notice
this is sdb not sdb1, and I got this spectacular kernel freeze. Let me
know if that''s some bug.
2012 May 07
53
kernel 3.3.4 damages filesystem (?)
Hallo,
"never change a running system" ...
For some months I run btrfs unter kernel 3.2.5 and 3.2.9, without
problems.
Yesterday I compiled kernel 3.3.4, and this morning I started the
machine with this kernel. There may be some ugly problems.
Copying something into the btrfs "directory" worked well for some files,
and then I got error messages (I''ve not
2011 Aug 17
2
[PATCH] btrfs: fix d_off in the first dirent
Since the d_off in the first dirent for "." (that originates from
the 4th argument "offset" of filldir() for the 2nd dirent for "..")
is wrongly assigned in btrfs_real_readdir(), telldir returns same
offset for different locations.
| # mkfs.btrfs /dev/sdb1
| # mount /dev/sdb1 fs0
| # cd fs0
| # touch file0 file1
| # ../test
| telldir: 0
| readdir: d_off = 2,
2012 May 05
5
Is it possible to reclaim block groups once they are allocated to data or metadata?
Hello list,
recently reformatted my home partition from XFS to RAID1 btrfs. I used
the default options to mkfs.btrfs except for enabling raid1 for data
as well as metadata. Filesystem is made up of two 1TB drives.
mike@mercury (0) pts/3 ~ $ sudo btrfs filesystem show
Label: none uuid: f08a8896-e03e-4064-9b94-9342fb547e47
Total devices 2 FS bytes used 888.06GB
devid 1 size 931.51GB used