Re: rw-mount-problem after raid1-failure

[Anand Jain <anand.jain@oracle.com>]

On 06/09/2015 01:10 AM, Martin wrote:
> Hello!
>
> I have a raid1-btrfs-system (Kernel 3.19.0-18-generic, Ubuntu Vivid Vervet,
> btrfs-tools 3.17-1.1). One disk failed some days ago. I could remount the
> remaining one with "-o degraded". After one day and some write-operations
> (with no errrors) I had to reboot the system. And now I can not mount "rw"
> anymore, only "-o degraded,ro" is possible.
>
> In the kernel log I found BTRFS: too many missing devices, writeable mount is
> not allowed.
>
> I read about https://bugzilla.kernel.org/show_bug.cgi?id=60594 but I did no
> conversion to a single drive.
>
> How can I mount the disk "rw" to remove the "missing" drive and add a new one?
> Because there are many snapshots of the filesystem, copying the system would
> be only the last alternative ;-)

  How many disks you had in the RAID1. How many are failed ?

Thanks Anand


> Thanks
>
> Martin
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