From: Martin Steigerwald <martin.steigerwald@teamix.de>
To: Roman Mamedov <rm@romanrm.net>
Cc: <linux-btrfs@vger.kernel.org>, Martin <martin@lichtvoll.de>
Subject: Re: degraded BTRFS RAID 1 not mountable: open_ctree failed, unable to find block group for 0
Date: Wed, 16 Nov 2016 12:18:01 +0100 [thread overview]
Message-ID: <51015243.zNEmreFU16@merkaba> (raw)
In-Reply-To: <3374757.aMVjisyVFB@merkaba>
Am Mittwoch, 16. November 2016, 11:55:32 CET schrieben Sie:
> So mounting work although for some reason scrubbing is aborted (I had this
> issue a long time ago on my laptop as well). After removing /var/lib/btrfs
> scrub status file for the filesystem:
>
> merkaba:~> btrfs scrub start /mnt/zeit
> scrub started on /mnt/zeit, fsid […] (pid=9054)
> merkaba:~> btrfs scrub status /mnt/zeit
> scrub status for […]
> scrub started at Wed Nov 16 11:52:56 2016 and was aborted after
> 00:00:00
> total bytes scrubbed: 0.00B with 0 errors
>
> Anyway, I will now just rsync off the files.
>
> Interestingly enough btrfs restore complained about looping over certain
> files… lets see whether the rsync or btrfs send/receive proceeds through.
I have an idea on why scrubbing may not work:
The filesystem is mounted read only and on checksum errors on one disk scrub
would try to repair it with the good copy from another disk.
Yes, this is it:
merkaba:~> btrfs scrub start -r /dev/satafp1/daten
scrub started on /dev/satafp1/daten, fsid […] (pid=9375)
merkaba:~> btrfs scrub status /dev/satafp1/daten
scrub status for […]
scrub started at Wed Nov 16 12:13:27 2016, running for 00:00:10
total bytes scrubbed: 45.53MiB with 0 errors
It would be helpful to receive a proper error message on this one.
Okay, seems today I learned quite something about BTRFS.
Thanks,
--
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next prev parent reply other threads:[~2016-11-16 11:18 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-16 10:25 degraded BTRFS RAID 1 not mountable: open_ctree failed, unable to find block group for 0 Martin Steigerwald
2016-11-16 10:43 ` Roman Mamedov
2016-11-16 10:55 ` Martin Steigerwald
2016-11-16 11:00 ` Roman Mamedov
2016-11-16 11:04 ` Martin Steigerwald
2016-11-16 12:57 ` Austin S. Hemmelgarn
2016-11-16 17:06 ` Martin Steigerwald
2016-11-17 20:05 ` Chris Murphy
2016-11-17 20:20 ` Austin S. Hemmelgarn
2016-11-19 20:27 ` Chris Murphy
2016-11-20 11:58 ` Niccolò Belli
2016-11-17 20:46 ` Martin Steigerwald
2016-11-16 11:18 ` Martin Steigerwald [this message]
2016-11-16 12:48 ` Austin S. Hemmelgarn
-- strict thread matches above, loose matches on Subject: below --
2017-08-22 9:31 g6094199
2017-08-22 10:28 ` Dmitrii Tcvetkov
2017-08-23 13:12 g6094199
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