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To: Chris Murphy <lists@colorremedies.com>
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From: Matt McKinnon <matt@techsquare.com>
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Date: Tue, 9 Aug 2016 20:17:05 -0400
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Subject: Re: BTRFS: error (device sda1) in btrfs_run_delayed_refs:2963:
 errno=-17 Object already exists
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-o usebackuproot worked well.

after the file system settled, performing a sync and a clean umount, a 
normal mount works now as well.

Anything I should be doing going forward?

Thanks,
Matt

On 08/09/2016 08:01 PM, Chris Murphy wrote:
> On Tue, Aug 9, 2016 at 5:15 PM, Matt McKinnon <matt@techsquare.com> wrote:
>> Hello,
>>
>> Our server recently crashed and was rebooted.  When it returned our BTRFS
>> volume is mounting read-only:
>
> What happens when you try mounting with -o usebackuproot ?
>
> If that fails, what output do you get for 'btrfs check' (without
> --repair)? If you only get some "errors 400, nbytes wrong" then
> --repair should fix the problem.
>
>
>