>>if you ever add a second disk and want to expand >>btrfs to span or raid across them both.
BTRFS is really easy to add or subtract a disk. Grub2 has no problem with it and I can still boot after the disk has been added and balanced. https://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices it's as easy as btrfs device add /dev/sdc /mnt btrfs filesystem balance /mnt As for other operating systems. This is a moot point, the scenario is using Ubuntu+Btrfs with physical SSD's. If the disks need to be converted back to legacy partition table format it's as simple as writing a few 00's to the first 64kib with dd. dd if=/dev/zero of=/dev/sdX count=64 For UEFI, I've already complained to the UEFI bord that they are holding back technology by insisting on using a 1980's file system to hold UEFI. It's the most ridiculous 'invention' in computers in the last 10 years. I understand the want and need to kill the BIOS but there are much more graceful solutions then defaulting to 30+ year old legacy tech. As for /boot it's part of my normal file system and the 1st 64Kib points to /boot on boot for the rest of the boot information. ubuntu@ubuntu:~$ sudo btrfs device scan Scanning for Btrfs filesystems ubuntu@ubuntu:~$ sudo mount /dev/sda /mnt ubuntu@ubuntu:~$ ls /mnt/@/boot abi-3.13.0-24-generic initrd.img-3.13.0-39-generic abi-3.13.0-35-generic memtest86+.bin ... initrd.img-3.13.0-36-generic vmlinuz-3.13.0-39-generic initrd.img-3.13.0-37-generic (truncated for brevity) Parted is broken when it comes to btrfs, it doesn't handle it gracefully at all. See the screenshot: The top left corner shows that parted just defaults to MSDOS even though you can clearly see in the top right that there is no partition table written. The bottom terminal is the Ubuntu 14.10 Live USB stick for comparison. Commands used were sudo parted -l and sudo fdisk /dev/sdX x d where X represents ' a ' and ' c ' respectively. Should I bring this up with the parted developers as well? ** Attachment added: "Top_left_parted_top_right_btrfs_bottom_msdos+fat.png" https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1383948/+attachment/4248578/+files/Top_left_parted_top_right_btrfs_bottom_msdos%2Bfat.png ** Also affects: parted (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1383948 Title: Ubiquity Installer doesn't recognize existing btrfs partitions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/parted/+bug/1383948/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
