BTRFS /dev/md0 recovery - mounted RW, after being hibernated.

BTRFS /dev/md0 recovery - mounted RW, after being hibernated.

[pe3no]

Hello Dear BTRFS Friends, nice to meet you!

Would it be possible to get BTRFS Developer/s help to recover my 
important data from BTRFS /dev/md0, please?
By mistake, it was mounted RW after being hibernated. I was not able to 
backup the data before, so I strongly need to recover it, with your 
Great Help, please!

I would  also like to ask a new BTRFS Feature which would prevent the 
possibility to mount a BTRFS partition RW, if it was previously hibernated.
I can specify it in more in detail and get involved into testing, if needed.

Thank you in advance for help and kind regards~~Piotrek~~pe3no

Re: BTRFS /dev/md0 recovery - mounted RW, after being hibernated.

[me]

On Mon, Oct 9, 2023 at 2:47 PM pe3no@o2.pl <pe3no@o2.pl> wrote:
>
> Hello Dear BTRFS Friends, nice to meet you!
>
> Would it be possible to get BTRFS Developer/s help to recover my
> important data from BTRFS /dev/md0, please?
> By mistake, it was mounted RW after being hibernated. I was not able to
> backup the data before, so I strongly need to recover it, with your
> Great Help, please!
Could you please post exactly what issue you're having? Are you saying
you mounted the filesystem on another system, then resumed hibernation
when the filesystem was already mounted? What kernel were you running
on the hibernated system? Please post all the exact errors you get
when attempting to mount the filesystem, including from dmesg
especially.
>
> I would  also like to ask a new BTRFS Feature which would prevent the
> possibility to mount a BTRFS partition RW, if it was previously hibernated.
> I can specify it in more in detail and get involved into testing, if needed.
>
There actually is some protection on this, at least with more recent
kernels. Knowing exactly what you did, what kernels you're running,
and what errors you're getting now is crucial for narrowing any of
this down.
> Thank you in advance for help and kind regards~~Piotrek~~pe3no