Re: 3.19.3: check tree block failed + WARNING: device 0 not present on scrub

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On 05/02/2015 01:29 PM, Marc MERLIN wrote:
On Sat, May 02, 2015 at 01:20:00PM -0400, Christian Dysthe wrote:

On 05/02/2015 01:05 PM, Marc MERLIN wrote:
On Sat, May 02, 2015 at 12:50:14PM -0400, Christian Dysthe wrote:
Mine is still doing it. This is from today's log:

/etc/cron.daily/btrfs-scrub:
WARNING: device 0 not present
scrub device /dev/sda3 (id 1) done
	scrub started at Sat May  2 08:03:46 2015 and finished after 241 seconds
	total bytes scrubbed: 109.06GiB with 0 errors
scrub device  (id 0) canceled
	scrub started at Sat May  2 08:03:46 2015 and was aborted after 0 seconds
	total bytes scrubbed: 0.00B with 0 errors

It doesn't seem to cause any problems but it would of course be good to know what it is and even get rid of it. This is my laptop with a SSD containing a small ext4 /boot partition and a latrge btrfs partition / with a /home subvolume (close to Ubuntu standard for btrfs).
Please run the equivalent of this on your filesystem:
btrfs-debug-tree -t 2 /dev/mapper/cryptroot 2>&1 | tee /tmp/debug_2.txt

And see if it completes or fails in the middle.
All I get is: Could not open /dev/mapper/cryptroot  The only thing
in that directory is -control I do not have any kinds of encryption
on anything.
I wrote "the equivalent of", so change /dev/mapper/cryptroot for your
device name :)
Okay then! :)

I ran it on my btrfs partition without any error ending with:

total bytes 239269314560
bytes used 116273602560
uuid 3d52dc93-c89f-453f-965d-8601d11e7710
Btrfs v3.17

Marc

--
Regards,
Christian Dysthe - Vivaldi Technlologies
Download Vivaldi at: https://vivaldi.com
Discuss it at: https://vivaldi.net

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