Re: Need help with btrfs.

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On Fri, Mar 5, 2021 at 10:39 AM Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote:
>
> Quick follow up on one thing I can't reproduce from George's scrub:
>
> [36365.549230] BTRFS error (device sda8): scrub: tree block
> 1777055424512 spanning stripes, ignored. logical=1777055367168
> [36365.549262] attempt to access beyond end of device
>                sda8: rw=0, want=3470811376, limit=3470811312
>
> I think this is just a benign artifact of the convert, and once the
> ext2_saved/image file is deleted, it will go away. I've asked upstream
> about it but I'm not sure when I'll hear back.

Ok Qu wants to see it. No need to file any bugs though. I'll just
track it upstream.

> mount -o ro,rescue=all /dev/sda8 /mnt/btrfs
> losetup -r /dev/loop1 /mnt/btrfs/ext2_saved/image
> e2image -Q /dev/loop1 /path/to/sda8ext4-e2image.bin
>
> I estimate the file could be around 700MB (maybe up to 2G). It can be
> compressed:
>
> tar -S -acf sda8ext4-e2image.bin.tar.gz sda8ext4-e2image.bin

And then upload the 'sda8ext4-e2image.bin.tar.gz' file some place
convenient like nextcloud, google drive, drop box, or equivalent.  A
user on #fedora recommended https://siasky.net/ but I don't know if
that can accept files as big as this will be.

Post the download URL here or email it offlist and I'll add it to the
upstream thread.


-- 
Chris Murphy
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