Hello, I've searched high and low about my issue, but have been unable to turn up anything like what I'm seeing right now.
A little background: I started using BTRFS over a year ago, in RAID 1 with mixed size drives. A few months ago, I started replacing the disks with 4 TB drives, and eventually switched over to RAID 6. I am currently running a 6x4TB RAID6 drive configuration, which should give me ~14.5 TB usable, but I'm only getting around 11. The weird thing is that It seems to completely fill 4/6 of the disks, while leaving lots of space free on 2 of the disks. I've tried full filesystem balances, yet the problem continues. # btrfs fi show Label: none uuid: 78733087-d597-4301-8efa-8e1df800b108 Total devices 6 FS bytes used 11.59TiB devid 1 size 3.64TiB used 3.64TiB path /dev/sdd devid 2 size 3.64TiB used 3.64TiB path /dev/sdg devid 3 size 3.64TiB used 3.64TiB path /dev/sdf devid 5 size 3.64TiB used 2.92TiB path /dev/sda devid 6 size 3.64TiB used 1.48TiB path /dev/sdb devid 7 size 3.64TiB used 3.64TiB path /dev/sdc btrfs-progs v4.2.3 # btrfs fi df /mnt/data Data, RAID6: total=11.67TiB, used=11.58TiB System, RAID6: total=64.00MiB, used=1.70MiB Metadata, RAID6: total=15.58GiB, used=13.89GiB GlobalReserve, single: total=512.00MiB, used=0.00B dan@Morpheus:/mnt/data/temp$ sudo btrfs fi usage /mnt/data # btrfs fi usage /mnt/data WARNING: RAID56 detected, not implemented WARNING: RAID56 detected, not implemented WARNING: RAID56 detected, not implemented Overall: Device size: 21.83TiB Device allocated: 0.00B Device unallocated: 21.83TiB Device missing: 0.00B Used: 0.00B Free (estimated): 0.00B (min: 8.00EiB) Data ratio: 0.00 Metadata ratio: 0.00 Global reserve: 512.00MiB (used: 0.00B) Data,RAID6: Size:11.67TiB, Used:11.58TiB /dev/sda 2.92TiB /dev/sdb 1.48TiB /dev/sdc 3.63TiB /dev/sdd 3.63TiB /dev/sdf 3.63TiB /dev/sdg 3.63TiB Metadata,RAID6: Size:15.58GiB, Used:13.89GiB /dev/sda 4.05GiB /dev/sdb 1.50GiB /dev/sdc 5.01GiB /dev/sdd 5.01GiB /dev/sdf 5.01GiB /dev/sdg 5.01GiB System,RAID6: Size:64.00MiB, Used:1.70MiB /dev/sda 16.00MiB /dev/sdb 16.00MiB /dev/sdc 16.00MiB /dev/sdd 16.00MiB /dev/sdf 16.00MiB /dev/sdg 16.00MiB Unallocated: /dev/sda 733.65GiB /dev/sdb 2.15TiB /dev/sdc 1.02MiB /dev/sdd 1.02MiB /dev/sdf 1.02MiB /dev/sdg 1.02MiB Can anyone shed some light on why a full balance (sudo btrfs balance start /mnt/data) doesnt seem to straighten this out? Any and all help is appreciated. Thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html