Hello all, I am currently running a balance on a RAID6 with former 8 devices (4TB each) to which I added 4 more (1TB each) and it now has a total 12. The balancing is still running but looking at "btrfs device usage" already gives some hint on the gradually changing data distribution of the RAID6: --- cut --- btrfs device usage $btrfsfilesystem /dev/sdb, ID: 1 Device size: 3.64TiB Data,RAID6: 3.37TiB Data,RAID6: 101.92GiB Metadata,single: 8.00MiB Metadata,RAID6: 6.34GiB Metadata,RAID6: 448.00MiB System,single: 4.00MiB System,RAID6: 2.00MiB Unallocated: 161.78GiB /dev/sdc, ID: 2 Device size: 3.64TiB Data,RAID6: 3.37TiB Data,RAID6: 101.92GiB Metadata,RAID6: 6.34GiB Metadata,RAID6: 448.00MiB System,RAID6: 2.00MiB Unallocated: 161.79GiB /dev/sdd, ID: 3 Device size: 3.64TiB Data,RAID6: 3.37TiB Data,RAID6: 101.92GiB Metadata,RAID6: 6.34GiB Metadata,RAID6: 448.00MiB System,RAID6: 2.00MiB Unallocated: 161.79GiB /dev/sde, ID: 4 Device size: 3.64TiB Data,RAID6: 3.37TiB Data,RAID6: 101.92GiB Metadata,RAID6: 6.34GiB Metadata,RAID6: 448.00MiB System,RAID6: 2.00MiB Unallocated: 161.79GiB /dev/sdf, ID: 5 Device size: 3.64TiB Data,RAID6: 3.37TiB Data,RAID6: 101.92GiB Metadata,RAID6: 6.34GiB Metadata,RAID6: 448.00MiB System,RAID6: 2.00MiB Unallocated: 161.79GiB /dev/sdg, ID: 6 Device size: 3.64TiB Data,RAID6: 3.37TiB Data,RAID6: 101.92GiB Metadata,RAID6: 6.34GiB Metadata,RAID6: 448.00MiB System,RAID6: 2.00MiB Unallocated: 161.79GiB /dev/sdh, ID: 7 Device size: 3.64TiB Data,RAID6: 3.37TiB Data,RAID6: 101.92GiB Metadata,RAID6: 6.34GiB Metadata,RAID6: 448.00MiB System,RAID6: 2.00MiB Unallocated: 161.79GiB /dev/sdi, ID: 8 Device size: 3.64TiB Data,RAID6: 3.37TiB Data,RAID6: 101.92GiB Metadata,RAID6: 6.34GiB Metadata,RAID6: 448.00MiB System,RAID6: 2.00MiB Unallocated: 161.79GiB /dev/sdj, ID: 9 Device size: 931.00GiB Data,RAID6: 101.92GiB Metadata,RAID6: 448.00MiB Unallocated: 828.64GiB /dev/sdk, ID: 10 Device size: 931.00GiB Data,RAID6: 101.92GiB Metadata,RAID6: 448.00MiB Unallocated: 828.64GiB /dev/sdl, ID: 11 Device size: 931.00GiB Data,RAID6: 101.92GiB Metadata,RAID6: 448.00MiB Unallocated: 828.64GiB /dev/sdm, ID: 12 Device size: 931.00GiB Data,RAID6: 101.92GiB Metadata,RAID6: 448.00MiB Unallocated: 828.64GiB --- cut --- The old disks now show two lines with RAID6 data. Likely it's the old, 8-device stripes vs. the new 12-device stripes. But there seems to be no detail available to show what the difference of those two lines might be. Maybe adding the number of stripes next to the data storage style could help i.e. --- cut --- /dev/sdi, ID: 8 Device size: 3.64TiB Data,RAID6,8-way-striped: 3.37TiB Data,RAID6,12-way-striped: 101.92GiB Metadata,RAID6,8-way-striped: 6.34GiB Metadata,RAID6,12-way-striped: 448.00MiB System,RAID6: 2.00MiB Unallocated: 161.79GiB --- cut --- Regards Christian -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
