On Tue, 09 Sep 2014 23:49:10 +0200, Arnd Bergmann wrote: > Label: none uuid: 1d88cccb-3d0e-42d9-8252-a226dc5c2e47 > Total devices 1 FS bytes used 8.79GB > devid 1 size 67.14GB used 67.14GB path /dev/sdc6 ^^^^^^^^^^^^^^^^^^^^ *ding ding ding*
The term "used" is confusing here and really should be called "allocated", since it's more than the number of actually used bytes. Note that df shows that you "have" ~66GB data and ~1GB metadata (giving approx. ~67GB), despite the fact that of those 65GB data allocated only ~8GB are actually used. However all these reserved data chunks are preventing the metadata space from expanding, which is pretty full: Metadata, DUP: total=1.00GB, used=799.54MB Here "total" also should be "allocated/reserved" and is 1GB, but btrfs feels it's necessary to allocate a new metadata chunk (which would also increase "total") and fails. Running balance with -dusage=x will garbage-collect the reserved but mostly-empty data chunks with "up to x" percent actual usage. -h -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html