Re: Free space missing

[Mike Fleetwood]

On 6 December 2016 at 12:40, Кравцов Роман Владимирович
 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
> devid1 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
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Free space missing

[Кравцов Роман Владимирович]

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
devid1 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

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