On Sat, Aug 1, 2015 at 9:46 PM, Duncan <1i5t5.duncan@xxxxxxx> wrote: > If it was setup with something earlier (not sure about 4.1.0, was it > affected? No. > but 4.0.x and earlier should be fine for setup), however, once > on a new kernel the usual ENOSPC workarounds can be given a try. That > would include a first balance start -dusage=0 -musage=0, and if that > didn't free up at least a gig on a second device, If I'm following this correctly, the reproduce steps would be to create a single device Btrfs that's ~94% full, add two devices, then convert to raid5. I think what's going on here is empty single profile data chunks aren't being deallocated, and it's effectively a 2 device raid5. So actually, you're right, either -dusage=0 might fix it, or better, newer kernel that automatically deallocated empty/converted single profile data chunks. But right now it will take another balance in the end because it looks like this is effectively a 2 device raid5, with the 3rd drive full of single only chunks (which might be empty?). -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
