Re: Device only missing if unmounted

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

Very strange, user space reads num_device as 4 but kernel
reads it as 3 (total_device), thus a device missing when
mounted.
Not sure what kind of hardware at your end, Can cache be
issue ? could you drop cache and check for me.
  echo 3 > /proc/sys/vm/drop_cache

Thanks, Anand

On 21/12/2014 01:32, Florian Uekermann wrote:
>
>  > > I checked this for all three devices and num_devices is 4 for all
> of them.
>  > > The full output is below.
>  >
>  > so now if you mount and run 'btrfs fi show <mnt>' that should tell
>  > device missing, which then 'btrfs device missing <mnt>' should be
>  > successful theoretically.
>
> No it doesn't. It says:
> root@oot:/home/shared# btrfs device delete missing /srv/storage/
> ERROR: error removing the device 'missing' - no missing devices found to
> remove
> and btrfs fi show /srv/storage doesn't report a missing device either
> (after mount).
> This behavior is the reason why I wrote here in the first place. It
> seems like a bug to me.
> Could the btrfs command line utility be the problem here (I am using the
> version the upcoming debian 8 ships)?
> Best regards,
> Florian