On 6 December 2016 at 12:40, Кравцов Роман Владимирович <r.kravtsov@xxxxxxxxxxx> wrote: > Hello. > > Why 'BTRFS used size' and 'du -s' are different? > > > [root@OraCI2 ~]# btrfs --version > btrfs-progs v4.8.3 > [root@OraCI2 ~]# btrfs fi show /dev/nvme0n1 > Label: 'OLD_PES' uuid: bd542f37-6baa-4af8-b87a-20d4e335e4b3 > Total devices 1 FS bytes used 2.53TiB > devid 1 size 2.91TiB used 2.90TiB path /dev/nvme0n1 > [root@OraCI2 ~]# btrfs fi usage /mnt/OLD/ > Overall: > Device size: 2.91TiB > Device allocated: 2.90TiB > Device unallocated: 9.97GiB > Device missing: 0.00B > Used: 2.53TiB > Free (estimated): 385.31GiB (min: 385.31GiB) > Data ratio: 1.00 > Metadata ratio: 1.00 > Global reserve: 512.00MiB (used: 0.00B) > > Data,single: Size:2.89TiB, Used:2.53TiB <------------------------- > /dev/nvme0n1 2.89TiB > > Metadata,single: Size:6.01GiB, Used:3.52GiB > /dev/nvme0n1 6.01GiB > > System,single: Size:32.00MiB, Used:432.00KiB > /dev/nvme0n1 32.00MiB > > Unallocated: > /dev/nvme0n1 9.97GiB > > [root@OraCI2 ~]# df -h | grep nvme0n1 > /dev/nvme0n1 3,0T 2,6T 386G > 88% /mnt/OLD > [root@OraCI2 ~]# du -sh /mnt/OLD/ > 2,0T /mnt/OLD/ <------------------------- > [root@OraCI2 ~]# > /dev/nvme0n1 on /mnt/OLD type btrfs > (rw,relatime,ssd,discard,space_cache,subvolid=5,subvol=/) > > WBR, > Roman Kravtsov These entries in the FAQ should help https://btrfs.wiki.kernel.org/index.php/FAQ#How_much_free_space_do_I_have.3F Mike -- 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
