Marco Lorenzo Crociani wrote:
Hi,
as I wrote today in IRCI experienced an issue with 'btrfs filesystem
usage'.
I have a 4 partitions RAID10 btrfs filesystem almost full.
'btrfs filesystem usage' reports wrong "Unallocated" indications.
Linux 4.5.3
btrfs-progs v4.5.3
# btrfs fi usage /data/
Overall:
Device size: 13.93TiB
Device allocated: 13.77TiB
Device unallocated: 167.54GiB
Device missing: 0.00B
Used: 13.44TiB
Free (estimated): 244.39GiB (min: 244.39GiB)
Data ratio: 2.00
Metadata ratio: 2.00
Global reserve: 512.00MiB (used: 0.00B)
Data,single: Size:8.00MiB, Used:0.00B
/dev/sda4 8.00MiB
Data,RAID10: Size:6.87TiB, Used:6.71TiB
/dev/sda4 1.72TiB
/dev/sdb3 1.72TiB
/dev/sdc3 1.72TiB
/dev/sdd3 1.72TiB
Metadata,single: Size:8.00MiB, Used:0.00B
/dev/sda4 8.00MiB
Metadata,RAID10: Size:19.00GiB, Used:14.15GiB
/dev/sda4 4.75GiB
/dev/sdb3 4.75GiB
/dev/sdc3 4.75GiB
/dev/sdd3 4.75GiB
System,single: Size:4.00MiB, Used:0.00B
/dev/sda4 4.00MiB
System,RAID10: Size:16.00MiB, Used:768.00KiB
/dev/sda4 4.00MiB
/dev/sdb3 4.00MiB
/dev/sdc3 4.00MiB
/dev/sdd3 4.00MiB
Unallocated:
/dev/sda4 1.76TiB
/dev/sdb3 1.76TiB
/dev/sdc3 1.76TiB
/dev/sdd3 1.76TiB
----------------------------------------------------------------------------------
# btrfs fi show /data/
Label: 'data' uuid: df6639d5-3ef2-4ff6-a871-9ede440e2dae
Total devices 4 FS bytes used 6.72TiB
devid 1 size 3.48TiB used 3.44TiB path /dev/sda4
devid 2 size 3.48TiB used 3.44TiB path /dev/sdb3
devid 3 size 3.48TiB used 3.44TiB path /dev/sdc3
devid 4 size 3.48TiB used 3.44TiB path /dev/sdd3
----------------------------------------------------------------------------------
# btrfs fi df /data/
Data, RAID10: total=6.87TiB, used=6.71TiB
Data, single: total=8.00MiB, used=0.00B
System, RAID10: total=16.00MiB, used=768.00KiB
System, single: total=4.00MiB, used=0.00B
Metadata, RAID10: total=19.00GiB, used=14.15GiB
Metadata, single: total=8.00MiB, used=0.00B
GlobalReserve, single: total=512.00MiB, used=0.00B
----------------------------------------------------------------------------------
# df -h
/dev/sda4 7,0T 6,8T 245G 97% /data
Regards,
For what it's worth... I have a 8 disk (7x 300GB + 1x 500GB) data
raid10, metadata raid1 setup and I get the following output of btrfs...
Label: 'xxyyzz' uuid: 12345678-9abc-def1-2345-6789abcdef01
Total devices 8 FS bytes used 1.05TiB
devid 1 size 268.05GiB used 265.94GiB path /dev/sda1
devid 2 size 279.40GiB used 277.22GiB path /dev/sdb
devid 3 size 279.40GiB used 277.32GiB path /dev/sdc
devid 4 size 279.40GiB used 278.73GiB path /dev/sdd
devid 5 size 279.40GiB used 277.72GiB path /dev/sde
devid 6 size 279.40GiB used 278.61GiB path /dev/sdf
devid 7 size 279.40GiB used 278.82GiB path /dev/sdg
devid 8 size 465.76GiB used 230.99GiB path /dev/sdh
# btrfs filesystem usage -T /
Overall:
Device size: 2.35TiB
Device allocated: 2.11TiB
Device unallocated: 244.83GiB
Device missing: 0.00B
Used: 2.11TiB
Free (estimated): 122.57GiB (min: 122.57GiB)
Data ratio: 2.00
Metadata ratio: 2.00
Global reserve: 512.00MiB (used: 0.00B)
Data Data Metadata System
Id Path RAID1 RAID10 RAID1 RAID1 Unallocated
-- --------- ---------- --------- -------- --------- -----------
1 /dev/sda1 - 132.97GiB - - 135.08GiB
2 /dev/sdb - 138.61GiB - - 140.79GiB
3 /dev/sdc - 138.66GiB - - 140.74GiB
4 /dev/sdd - 138.87GiB 1.00GiB - 139.53GiB
5 /dev/sde 1.00GiB 137.86GiB 1.00GiB - 139.53GiB
6 /dev/sdf - 138.81GiB 1.00GiB - 139.59GiB
7 /dev/sdg 1.00GiB 138.38GiB 1.00GiB 64.00MiB 138.96GiB
8 /dev/sdh - 113.46GiB 4.00GiB 64.00MiB 348.24GiB
-- --------- ---------- --------- -------- --------- -----------
Total 1.00GiB 1.05TiB 4.00GiB 64.00MiB 1.29TiB
Used 1007.30MiB 1.05TiB 1.66GiB 400.00KiB
What I don't get is... how can I have 244.8 GB unallocated when the
table below clearly shows that there is as much as 1.29TiB
unallocated.... does not appear to make sense to me at least...
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