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,
--
Marco Crociani
Prisma Telecom Testing S.r.l.
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