Re: moving btrfs subvolumes to new disk

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On Tue, Mar 22, 2016 at 7:40 PM, Ryan Erato <rerato@xxxxxxxxx> wrote:
> Finally got around to running the suggested commands. Same error with
> the send, but not much output to help.  The check operation did seem
> to reveal some potential issues. Here's the play-by-play along with
> the file output from check:
>
> [liveuser@localhost /]$ sudo btrfs check /dev/sda6 >
> /home/liveuser/btrfscheck.txt
> checking extents
> checking free space cache
> checking fs roots
> root 257 inode 13324701 errors 200, dir isize wrong
> root 258 inode 226392 errors 200, dir isize wrong
> root 258 inode 236055 errors 2000, link count wrong
> unresolved ref dir 226392 index 35 namelen 7 name LOG.old filetype 0
> errors 3, no dir item, no dir index
> root 258 inode 236273 errors 2000, link count wrong
> root 258 inode 236276 errors 2000, link count wrong
> unresolved ref dir 226392 index 39 namelen 15 name MANIFEST-000015
> filetype 0 errors 3, no dir item, no dir index
> root 258 inode 236277 errors 2000, link count wrong
> unresolved ref dir 226392 index 41 namelen 7 name CURRENT filetype 0
> errors 3, no dir item, no dir index
> root 258 inode 240618 errors 2000, link count wrong
> unresolved ref dir 226392 index 115 namelen 10 name 000089.log
> filetype 0 errors 3, no dir item, no dir index
> root 487 inode 13324701 errors 200, dir isize wrong
> root 488 inode 226392 errors 200, dir isize wrong
> root 488 inode 236055 errors 2000, link count wrong
> unresolved ref dir 226392 index 35 namelen 7 name LOG.old filetype 0
> errors 3, no dir item, no dir index
> root 488 inode 236273 errors 2000, link count wrong
> root 488 inode 236276 errors 2000, link count wrong
> unresolved ref dir 226392 index 39 namelen 15 name MANIFEST-000015
> filetype 0 errors 3, no dir item, no dir index
> root 488 inode 236277 errors 2000, link count wrong
> unresolved ref dir 226392 index 41 namelen 7 name CURRENT filetype 0
> errors 3, no dir item, no dir index
> root 488 inode 240618 errors 2000, link count wrong
> unresolved ref dir 226392 index 115 namelen 10 name 000089.log
> filetype 0 errors 3, no dir item, no dir index

OK so now the question is if 'btrfs check --repair' can fix this, and
what version to use? 4.4.1 or 4.5.0? Based on the changelog, you can
probably use either version. And I think it should be safe. But, you
should still have backups seeing as you can mount the volume.


>
> [liveuser@localhost /]$ sudo mount /dev/sda6 /mnt/hdd
>
> [liveuser@localhost /]$ sudo btrfs send -vvv --no-data -f homesnap.btr
> /mnt/hdd/home/home.snap/
> Mode NO_FILE_DATA enabled
> At subvol /mnt/hdd/home/home.snap/
> ERROR: send ioctl failed with -2: No such file or directory

OK so there's something off with the metadata and it's not going to do
a send as a result is what this sounds like to me.


-- 
Chris Murphy
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