I am just getting started with btrfs and wanted to test raid5. I set
it up and thought it was setup correctly but when I run " btrfs fi
usage /mnt/btrdata" I get the message "WARNING: RAID56 detected, not
implemented". Does this mean I have no redundancy? I know it is
experimental and I am not relying on it for production data (or data
that cannot be replaced). I don't think I do. When I check the free
space (3.7TB) it is the same as all the drive together (4x931MB).
Any assistance in helping me understand would be appreciated greatly.
------
uname -a
Linux alexandria.localdomain 3.17.8-300.fc21.x86_64 #1 SMP Thu Jan 8
23:32:49 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
------
btrfs --version
Btrfs v3.18.1
------
btrfs fi show
Label: 'btrfsMain' uuid: a111f6f0-4dfd-4327-932a-
2eb87e173632
Total devices 4 FS bytes used 566.93GiB
devid 1 size 931.51GiB used 192.02GiB path /dev/sdb
devid 2 size 931.51GiB used 192.00GiB path /dev/sdd
devid 3 size 931.51GiB used 192.00GiB path /dev/sde
devid 4 size 931.51GiB used 192.00GiB path /dev/sdg
Btrfs v3.18.1
-----
btrfs fi df /mnt/btrdata
Data, single: total=8.00MiB, used=0.00B
Data, RAID5: total=585.00GiB, used=580.04GiB
System, single: total=4.00MiB, used=0.00B
System, RAID5: total=12.00MiB, used=64.00KiB
Metadata, single: total=8.00MiB, used=0.00B
Metadata, RAID5: total=3.00GiB, used=642.98MiB
GlobalReserve, single: total=224.00MiB, used=0.00B
-----
btrfs fi usage /mnt/btrdata
WARNING: RAID56 detected, not implemented
WARNING: RAID56 detected, not implemented
WARNING: RAID56 detected, not implemented
Overall:
Device size: 3.64TiB
Device allocated: 20.00MiB
Device unallocated: 3.64TiB
Used: 0.00B
Free (estimated): 267.45PiB (min: 4.21TiB)
Data ratio: 0.00
Metadata ratio: 0.00
Global reserve: 224.00MiB (used: 0.00B)
Data,single: Size:8.00MiB, Used:0.00B
/dev/sdb 8.00MiB
Data,RAID5: Size:588.00GiB, Used:584.31GiB
/dev/sdb 196.00GiB
/dev/sdd 196.00GiB
/dev/sde 196.00GiB
/dev/sdg 196.00GiB
Metadata,single: Size:8.00MiB, Used:0.00B
/dev/sdb 8.00MiB
Metadata,RAID5: Size:3.00GiB, Used:649.06MiB
/dev/sdb 1.00GiB
/dev/sdd 1.00GiB
/dev/sde 1.00GiB
/dev/sdg 1.00GiB
System,single: Size:4.00MiB, Used:0.00B
/dev/sdb 4.00MiB
System,RAID5: Size:12.00MiB, Used:64.00KiB
/dev/sdb 4.00MiB
/dev/sdd 4.00MiB
/dev/sde 4.00MiB
/dev/sdg 4.00MiB
Unallocated:
/dev/sdb 734.49GiB
/dev/sdd 734.51GiB
/dev/sde 734.51GiB
/dev/sdg 734.51GiB
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