unmountable partition and live distro (no space left)

unmountable partition and live distro (no space left)

[Claudio Carbone]

Hello all.

My system failed and I thought of trying btrfs.
After repartitioning and installing, nothing booted and my (btrfs 
formatted) home partition is unmountable (parent transid).
I discovered I can mount the partition with btrfs-restore but, since I'm 
running off of a live usb Ubuntu, mounting fails at some point due to 
lack of space.
So is there a way I can mount the partition on a live distro to recover 
what is recoverable?

Thank you
Claudio

Re: unmountable partition and live distro (no space left)

[Claudio Carbone]

I'v been told this is missing relevant details.
The original kernel version was 3.2.0-something (standard Ubuntu 12.04 LTS).
I've since upgraded to 3.7 but this has made no difference.
Right now I don't have the dmesg, I'll post it later.

Currently I've been able to mount the partition with btrfs-restore and 
am trying to rsync it on another ext4 volume.

Claudio



On 16/12/12 14:42, Claudio Carbone wrote:
> Hello all.
>
> My system failed and I thought of trying btrfs.
> After repartitioning and installing, nothing booted and my (btrfs 
> formatted) home partition is unmountable (parent transid).
> I discovered I can mount the partition with btrfs-restore but, since 
> I'm running off of a live usb Ubuntu, mounting fails at some point due 
> to lack of space.
> So is there a way I can mount the partition on a live distro to 
> recover what is recoverable?
>
> Thank you
> Claudio
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Re: unmountable partition and live distro (no space left)

[cwillu]

Try booting with bootflags=ro,recovery in grub (with the latest
possible kernel), or mounting with -o recovery from the livecd
(likewise).  If it works, then you're done, you should be able to boot
normally after a clean umount and shutdown.  If it doesn't, post dmesg
from the attempt.

> I'v been told this is missing relevant details.
> The original kernel version was 3.2.0-something (standard Ubuntu 12.04 LTS).
> I've since upgraded to 3.7 but this has made no difference.
> Right now I don't have the dmesg, I'll post it later.
>
> Currently I've been able to mount the partition with btrfs-restore and am
> trying to rsync it on another ext4 volume.

Terminology note: btrfs-restore doesn't "mount" anything, it just
copies files directly from a device.

Re: unmountable partition and live distro (no space left)

[Claudio Carbone]

On 16/12/12 21:40, cwillu wrote:
> Try booting with bootflags=ro,recovery in grub (with the latest
> possible kernel), or mounting with -o recovery from the livecd
> (likewise).  If it works, then you're done, you should be able to boot
> normally after a clean umount and shutdown.  If it doesn't, post dmesg
> from the attempt.

Already tried mounting with -o recovery to no avail.
>
>> I'v been told this is missing relevant details.
>> The original kernel version was 3.2.0-something (standard Ubuntu 12.04 LTS).
>> I've since upgraded to 3.7 but this has made no difference.
>> Right now I don't have the dmesg, I'll post it later.
>>
>> Currently I've been able to mount the partition with btrfs-restore and am
>> trying to rsync it on another ext4 volume.
> Terminology note: btrfs-restore doesn't "mount" anything, it just
> copies files directly from a device.
I didn't know that at the time of writing.
Here is the btrfsck log
https://www.dropbox.com/s/pwmj2t9kvy6sqpc/btrfs_log.txt

Claudio

Re: unmountable partition and live distro (no space left)

[Claudio Carbone]

On 17/12/12 00:21, Claudio Carbone wrote:
>
> Here is the btrfsck log
> https://www.dropbox.com/s/pwmj2t9kvy6sqpc/btrfs_log.txt

And here is the mount error dmesg tail
https://www.dropbox.com/s/x7w552g6vkalrn7/btrfs_mount_log.txt

Claudio