[Bug 1383948] Re: Ubiquity Installer doesn't recognize existing btrfs partitions

Damiön la Bagh 1383948 at bugs.launchpad.net
Wed Oct 29 01:39:05 UTC 2014


I'll test in 14.10 and get back to you.

@ Phillip 
As for your legacy comment. 

"If you intend to boot from that drive it *must* have a partition table
to boot."

I have been booting my BTRFS systems just fine on pure raw btrfs for two
years now on my laptop and desktop.

As our good friends over at ARCH have also proven
https://bbs.archlinux.org/viewtopic.php?id=166591
https://wiki.archlinux.org/index.php/Partitioning#Btrfs_Partitioning

BTRFS reserves the first 64Kib in order to allow booting. GRUB2 already
supports booting from BTRFS. As BTRFS is its own partition table, LVM
and filesystem in one.

Partition tables are legacy from the 50's!! it's 2014! Technology has gotten past partition tables in both ZFS and BTRFS.
It's not about the 1mb that a partition table occupies but removing complexity and overhead (layers of the onionskin). This leads to a speed increase in btrfs especially on SSD's. Plus it's easier to manage storage when you have One common set of commands instead of several unrelated programs each with their own syntax. So in the end it's also faster to set up your system and manage it running raw btrfs.

Swap and that terrible EFI folder can be held on a SD card to counter
any argument before it starts.

So please come to the future, where things are just a little less
complex.

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https://bugs.launchpad.net/bugs/1383948

Title:
  Ubiquity Installer doesn't recognize existing btrfs partitions

Status in “ubiquity” package in Ubuntu:
  Incomplete

Bug description:
  Steps to reproduce the bug:
  On a machine with an existing raw btrfs partition (no partition table, just raw btrfs to disk as btrfs is intended to be used)
  (created with sudo mkfs.btrfs /dev/sdc)
  From the 14.04.1 LTS live USB
  open a terminal
  scan for btrfs partitions using:
    sudo btrfs device scan
  then view the partition and data usage with
    sudo btrfs filesystem show
  The device is shown
  Label: none  uuid: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxxxx
  	Total devices 1 FS bytes used 37.71GiB
  	devid    2 size 223.57GiB used 40.03GiB path /dev/sdc
  Start the Ubuntu Ubiquity Installer by clicking on the icon in the launcher
  Choose Download Updates and install Fluendo then
  Next
  Then choose Do Something Else, Choose partitions manually
  Scroll down to /dev/sdc
  The Ubiquity Partition manager doesn't recognize the btrfs disk/volume and just says free-space (see screenshot with proof)

  What should happen:
  At the partition screen it should recgonize my existing btrfs volume and let me reinstall without formating the btrfs volume

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