Hello, Ok, so It's a new gentoo install on (2) 2T sata 3 drives (Raid1).
So I'm using this document as a reference: http://wiki.gentoo.org/wiki/Btrfs_native_system_root#Installing_the_MBR I ran the "o" option on both disks and it is the only deviation from the document: Command (? for help): o This option deletes all partitions and creates a new protective MBR. Proceed? (Y/N): Y So using cgdisk I end up with: Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: gpt Disk identifier: A278FD71-0AFC-448C-817F-BAA52F97F6E1 Device Start End Size Type /dev/sda1 2048 8191 3M BIOS boot partition /dev/sda2 8192 1024000 496M Linux filesystem /dev/sda3 1026048 3907029134 1.8T Linux filesystem Disk /dev/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 08A52E74-1A4D-4681-9BF6-0F3A436251E0 Device Start End Size Type /dev/sdb1 2048 8191 3M BIOS boot partition /dev/sdb2 8192 1024000 496M Linux filesystem /dev/sdb3 1026048 3907029134 1.8T Linux filesystem /dev/sda is identical (HD are same make/model). Then : mkfs -t btrfs -L BTROOT -m raid1 -d raid1 /dev/sda3 /dev/sdb3 mkfs -t btrfs -L BOOT -m raid1 -d raid1 /dev/sdb2 /dev/sda2 Turning ON incompat feature 'mixed-bg': mixed data and metadata block groups Turning ON incompat feature 'extref': increased hardlink limit per file to 65536 Created a data/metadata chunk of size 8388608 adding device /dev/sda2 id 2 fs created label BOOT on /dev/sdb2 nodesize 4096 leafsize 4096 sectorsize 4096 size 992.00MiB Turning ON incompat feature 'extref': increased hardlink limit per file to 65536 adding device /dev/sdb3 id 2 fs created label BTROOT on /dev/sda3 nodesize 16384 leafsize 16384 sectorsize 4096 size 3.64TiB Btrfs v3.12 So far so good(?). But now it looks to me like a straight forward handbook install; OR follow the aforementioned link explicitly for sections: Root Volume and Boot Volume and Other Volumes (suggestions for Other Volumes (sub-volumes) are welcome. Another question. I want to run openrc not systemd. All of that init scripts looks like systemd. How and where would I modify that page if I intend to use openrc, if at all? all discussion, comments and suggestions are welcome. James
