Re: unable to mount multi disk volume with recovery mode

[Ivan Petrovic <ivan@ipplus.rs>]

I don't know... but after btrfs-zero-log now I can't:

ivan@ipplus-dev:~$ sudo btrfs filesystem df /dev/sdb
[sudo] password for ivan:
ERROR: couldn't get space info - Inappropriate ioctl for device
ERROR: get_df failed Inappropriate ioctl for device
ivan@ipplus-dev:~$

So you're saying that I can't make first and third partition to work
with it's data? Maybe I'll try with btrfs-restore, do you think it can
rescue this 2 drives?

Thanks

2015-09-04 23:17 GMT+02:00 Hugo Mills <hugo@carfax.org.uk>:
> On Fri, Sep 04, 2015 at 09:07:34PM +0000, Ivan wrote:
>>
>> Just to add this:
>>
>> ivan@ipplus-dev:~$ sudo btrfs filesystem df /mnt/ambis/
>> Data, single: total=108.76GiB, used=107.11GiB
>> System, single: total=32.00MiB, used=20.00KiB
>> Metadata, single: total=3.00GiB, used=2.34GiB
>> ivan@ipplus-dev:~$
>
>    (If you can't mount the FS, how did you get this output? -- In what
> I say below, I'm asuming that this was the last output from btrfs fi
> df on the broken filesystem before it broke).
>
>    This is the problem: You're using single for everything. That means
> that with the loss of one device, approximately one part in three of
> your filesystem is missing, including the metadata. If the missing
> drive is truly broken, this filesystem is dead, without any good means
> of recovery. You'll need to use your backups.
>
>    You would have to have RAID-1 system and metadata for the FS to be
> even partly recoverable with a missing device. (Or RAID-10, -5 or -6).
>
>    Hugo.
>
> --
> Hugo Mills             | "There's more than one way to do it" is not a
> hugo@... carfax.org.uk | commandment. It is a dire warning.
> http://carfax.org.uk/  |
> PGP: E2AB1DE4          |



-- 
Ivan Petrović

IP PLUS STUDIO
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-- 
IP PLUS STUDIO
Vojvode Stepe 403v, 11221 Beograd, Srbija
T: +381 11 630 2853
F: +381 11 630 2853
www.ipplus.rs