Re: btrfs convert running out of space

[Chris Murphy <lists@colorremedies.com>]

> On Mon, Jan 19, 2015 at 5:13 PM, Gareth Pye <gareth@cerberos.id.au> wrote:
> I just tried from a slightly different tack, after doing another
> -dusage=2 pass I did the following:
> # btrfs balance start -v -dconvert=raid1 -dsoft -dusage=96 /data
> Dumping filters: flags 0x1, state 0x0, force is off
>   DATA (flags 0x302): converting, target=16, soft is on, usage=96
> Done, had to relocate 0 out of 3763 chunks
> # btrfs balance start -v -dconvert=raid1 -dsoft -dusage=99 /data
> Dumping filters: flags 0x1, state 0x0, force is off
>   DATA (flags 0x302): converting, target=16, soft is on, usage=99
> ERROR: error during balancing '/data' - No space left on device


I guess I don't really understand the purpose of combining dconvert
and dusage. Sure, it should either work or give an error, so there may
still be a bug here. But I'm just not following why they'd be used
together, seems superfluous. What happens when they're tried
separately? I'm not sure which one's instigating the problem.

Also I think you should upgrade to btrfs-progs 3.18, seeing as 3.12 is
old and if there's a bug in that version of progs vs the kernel, it's
not going to get fixed.



-- 
Chris Murphy