Cannot copy files to RN316 although I have 22TB free...

Wow! The remaining 80% of the Balance took most of today.

data        balance    2021-03-05 09:34:32  2021-03-05 10:29:27  completed  ERROR: error during balancing '/data': No space left on device
T
data        balance    2021-03-05 19:39:44  2021-03-05 19:49:07  completed  ERROR: error during balancing '/data': No space left on device
T
data        balance    2021-03-05 21:09:45  2021-03-05 21:27:23  completed  ERROR: error during balancing '/data': No space left on device
T
data        balance    2021-03-05 21:28:15  2021-03-05 21:28:19  completed  Done, had to relocate 1 out of 23557 chunks
data        balance    2021-03-05 21:45:20  2021-03-05 21:46:05  completed  Done, had to relocate 29 out of 23557 chunks
data        balance    2021-03-05 21:57:26  2021-03-05 21:57:31  completed  Done, had to relocate 1 out of 23529 chunks
data        balance    2021-03-05 21:59:22  2021-03-05 21:59:27  completed  Done, had to relocate 1 out of 23529 chunks
data        balance    2021-03-05 21:59:48  2021-03-05 21:59:53  completed  Done, had to relocate 1 out of 23529 chunks
data        balance    2021-03-05 22:25:13  2021-03-05 22:25:18  completed  Done, had to relocate 1 out of 23529 chunks
data        balance    2021-03-05 23:19:38  2021-03-05 23:19:44  completed  Done, had to relocate 1 out of 23529 chunks
data        balance    2021-03-06 00:54:22  2021-03-06 00:54:28  completed  Done, had to relocate 1 out of 23529 chunks
data        defrag     2021-03-06 00:54:49  2021-03-06 03:02:04  completed
data        balance    2021-03-06 11:23:49  2021-03-07 18:58:54  completed  Done, had to relocate 8286 out of 23482 chunks

Out of curiosity is there a correlation between the 8286 chunks relocated and the 10 odd TB that Data was reduced by? So something like 8286 x 1GB = 10TB approximately?

BTRFS:

Label: '*:root'  uuid: *
	Total devices 1 FS bytes used 1.48GiB
	devid    1 size 4.00GiB used 3.61GiB path /dev/md0

Label: '*:data'  uuid:*
	Total devices 2 FS bytes used 13.24TiB
	devid    1 size 18.17TiB used 10.02TiB path /dev/md127
	devid    2 size 27.28TiB used 4.83TiB path /dev/md126

=== filesystem /data ===
Data, single: total=14.81TiB, used=13.23TiB
System, RAID1: total=32.00MiB, used=2.04MiB
Metadata, RAID1: total=6.85GiB, used=6.80GiB
Metadata, DUP: total=10.50GiB, used=8.44GiB
GlobalReserve, single: total=512.00MiB, used=24.00KiB
=== subvolume /data ===

Does that look all good now? I have not lost data?

So what should I do now?

Happy to do following as was suggested before.

btrfs balance start -dusage=10 /data
btrfs balance start -dusage=30 /data
btrfs balance start -dusage=50 /data
btrfs balance start /data

Or anything else such as Scrub or  a Defrag.

I don't want to again have the same issue of 10TB being free but not being able to copy any files to the RN316.

So if these operations take another week, that is perfectly fine. I'd rather have everythign optimised now. 

Thanks again!!!

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Platypus69 wrote:

Does that look all good now? I have not lost data?

 

So what should I do now?

All is good now, and there is no need to run anything immediately.  You can of course restore the data you deleted.

But I do suggest setting up a maintenance schedule using the volume schedule control on the volume settings wheel (again, mine uses a four-month cycle, running one maintenance task each month).  You could alternatively enable autodefrag on the share settings, and run the remaining tasks on a 3 month cycle.

You could also re-enable snapshots on the remaining shares if you like - ideally setting up custom snapshots with fixed retention.  I use 3 months on my own systems for most shares.

If you don't have a backup plan in place for your NAS you should definitely set up one - for instance, purchasing a large USB backup disk.

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Platypus69 wrote:

 

Out of curiosity is there a correlation between the 8286 chunks relocated and the 10 odd TB that Data was reduced by? So something like 8286 x 1GB = 10TB approximately?

 

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Each chunk is 1 GiB.  So while there is a correlation, you reclaimed somewhat more space than that.  There could have been some chunks that were allocated but completely unused - not sure if the log would show them as relocated or not.

Thanks for that. Will do.

Thanks A BILLION for  everyone's help and all practical advice!!!!!!

And patience :)

I do have another NAS/HDD for the photos but am wondering if I just RAR up each month and then store them in AWS Deep Glacier for $0.00099 per GB-month.

Notice that my New DS1819+ can sync with BackBlaze, so maybe I'll take advantge of that???

StephenB 

Out of interest, how did your full balance distribute the data between md127 and md126, in the end?

:)

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rn_enthusiast wrote:

StephenB 

 

Out of interest, how did your full balance distribute the data between md127 and md126, in the end?

 

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It's still running - at the moment the stats are 

Label: '2fe72582:data'  uuid: a665beff-2a06-4b88-b538-f9fa4fb2dfef
        Total devices 2 FS bytes used 13.64TiB
        devid    1 size 16.36TiB used 9.55TiB path /dev/md127
        devid    2 size 10.91TiB used 4.11TiB path /dev/md126

It started at

Label: '2fe72582:data'  uuid: a665beff-2a06-4b88-b538-f9fa4fb2dfef
	Total devices 2 FS bytes used 13.54TiB
	devid    1 size 16.36TiB used 12.72TiB path /dev/md127
	devid    2 size 10.91TiB used 1.27TiB path /dev/md126

So it has shifted quite a few blocks to md126.