hi

hi

[vgrvelu]

hi

I created  btrfs file system  on one of  sda partition. when I mount
with mount -t /dev/sda17  /btrfs,

it is failing with wrong fs type bad option. when i see the dmesg,
mount command is searching  for ext3, ext2 filesystem on sda17. but
not btrfs.
even in the man page of mount, btrfs is not mentioned as supported
file system type.

Please help me to solve this issue.

thanks
rajan

Re: hi

[Chris Murphy]

On Sep 24, 2013, at 5:39 PM, vgrvelu <vgrajan2005@gmail.com> wrote:

> hi
> 
> I created  btrfs file system  on one of  sda partition. when I mount
> with mount -t /dev/sda17  /btrfs,

remove the -t or add btrfs after it.



Chris Murphy

Re: hi

[vgrvelu]

Hi

after doing mofprobe btrfs I could see btrfs entry in proc file
system. But still mount command is failing. It looks like super block
is corrupted

thanks
rajan

On Wed, Sep 25, 2013 at 5:26 AM, Chris Murphy <lists@colorremedies.com> wrote:
>
> On Sep 24, 2013, at 5:39 PM, vgrvelu <vgrajan2005@gmail.com> wrote:
>
>> hi
>>
>> I created  btrfs file system  on one of  sda partition. when I mount
>> with mount -t /dev/sda17  /btrfs,
>
> remove the -t or add btrfs after it.
>
>
>
> Chris Murphy
> --
> 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



-- 
A.V.Gomathirajan
M.S Research (Entrepreneurship)
Indian Institute of Technology Madras

Re: hi

[Wang Shilong]

Hello,

> Hi
> 
> after doing mofprobe btrfs I could see btrfs entry in proc file
> system. But still mount command is failing. It looks like super block
> is corrupted

You can try to recover superblocks.

Steps:

#git clone http://github.com/kdave/btrfs-progs.git 
# cd btrfs-progs
# git pull http://github.com/kdave/btrfs-progs.git  integration-20130924
# make && make install
# btrfs rescue super-recover -vy <device>


Let's see what will happen..

Thanks,
Wang
> 
> thanks
> rajan
> 
> On Wed, Sep 25, 2013 at 5:26 AM, Chris Murphy <lists@colorremedies.com> wrote:
>> 
>> On Sep 24, 2013, at 5:39 PM, vgrvelu <vgrajan2005@gmail.com> wrote:
>> 
>>> hi
>>> 
>>> I created  btrfs file system  on one of  sda partition. when I mount
>>> with mount -t /dev/sda17  /btrfs,
>> 
>> remove the -t or add btrfs after it.
>> 
>> 
>> 
>> Chris Murphy
>> --
>> 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
> 
> 
> 
> -- 
> A.V.Gomathirajan
> M.S Research (Entrepreneurship)
> Indian Institute of Technology Madras
> --
> 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

Re: hi

[Eric Sandeen]

On 9/25/13 8:00 AM, vgrvelu wrote:
> Hi
> 
> after doing mofprobe btrfs I could see btrfs entry in proc file
> system. But still mount command is failing. It looks like super block
> is corrupted

Seems doubtful if you *just* ran mkfs.btrfs.

Can you paste the exact commands you issued, from mkfs to mount,
and the resulting kernel messages?

-Eric

> thanks
> rajan

Re: hi

[Eric Sandeen]

On 9/24/13 6:39 PM, vgrvelu wrote:
> hi
> 
> I created  btrfs file system  on one of  sda partition. when I mount
> with mount -t /dev/sda17  /btrfs,

# mount -t /dev/sda17 /btrfs?

That doesn't work.  Maybe you meant :

# mount -t btrfs /dev/sda17 /btrfs ?

> it is failing with wrong fs type bad option. when i see the dmesg,
> mount command is searching  for ext3, ext2 filesystem on sda17. but
> not btrfs.
> even in the man page of mount, btrfs is not mentioned as supported
> file system type.
> 
> Please help me to solve this issue.

does your kernel support btrfs?  Sounds like maybe not.

To load it in case it's a module:
# modprobe btrfs

then see if the kernel even knows what btrfs is, either via the
module, or due to being built into the kernel image already:

# grep btrfs /proc/filesystems

The first cmd might fail if it's built into the kernel, but if that's
the reason, the 2nd one should find btrfs in /proc/filesystems...

If not, you need a kernel that supports btrfs.

-Eric
 
> thanks
> rajan
> --
> 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
> 

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