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Thread: btrfs makes old hdds appear to operate faster

  1. #31
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    Re: btrfs makes old hdds appear to operate faster

    And it still recognizes the drive as Btrfs format.
    so why won't it boot up?
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  2. #32
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    Re: btrfs makes old hdds appear to operate faster

    Quote Originally Posted by grahammechanical View Post
    I tried again to get a Raring install on btrfs (yesterday's daily) Same result even though I choose to continue without installing a bootloader. I get an installer crashed message at the end and sudo update-grub from another Ubuntu does not detect an OS in the partition.

    Is this because the format is btrfs? Or is it a problem with this particular daily? Will this happen on Ext4?

    Update: This daily image installs without any problems when the file system is Ext4, including installing Grub into the MBR. I have just done it. So, it is an issue between Grub and the btrfs file system.

    Regards.

    I took the drive and hooked it up as secondary master. There is no way that GRUB will detect and index that (btrfs) file. It works well if you are just using apt.. but when you try to upgrade from QQ to RR then the whole install seems to go south and grub rescue> prompt is all you get.

    btw .. I am not an expert on grub rescue>

    geesh...
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  3. #33
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    Re: btrfs makes old hdds appear to operate faster

    Thanks ventrical for explaining the mystery of the @home folder that is on my btrfs /home partition.

    Well, I have given my uneducated guess that Grub cannot read the boot configuration files that are in /boot when the partition is btrfs. The Grub message is "unknown file system" after all.

    I have an old IDE drive of 3.24Gb and a couple from the days when drives came in MBs. I am tempted to hook one up (as you put it), format it as Ext4 and give it a mount point of /boot when installing Ubuntu onto a btrfs partition. If that works then I will take that as evidence that Grub cannot read btrfs.

    Regards.
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  4. #34
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    Re: btrfs makes old hdds appear to operate faster

    I have a bunch of old Quantum Fireball and Bigfoot drives, Think i may have to not throw them away if this is as good as it sounds.
    clear && echo paste url and press enter; read paste; (youtube-dl $paste) | zenity --progress --title="" --text "Downloading, please wait" --auto-close --pulsate && ans=$(zenity --file-selection); gnome-terminal -x mplayer "$ans"

  5. #35
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    Re: btrfs makes old hdds appear to operate faster

    Quote Originally Posted by grahammechanical View Post
    Thanks ventrical for explaining the mystery of the @home folder that is on my btrfs /home partition.

    Well, I have given my uneducated guess that Grub cannot read the boot configuration files that are in /boot when the partition is btrfs. The Grub message is "unknown file system" after all.

    I have an old IDE drive of 3.24Gb and a couple from the days when drives came in MBs. I am tempted to hook one up (as you put it), format it as Ext4 and give it a mount point of /boot when installing Ubuntu onto a btrfs partition. If that works then I will take that as evidence that Grub cannot read btrfs.

    Regards.
    The error I am getting is:

    error : file '/@/boot/grub/i386-pc/normal.mod ' not found
    grub rescue>
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  6. #36
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    Re: btrfs makes old hdds appear to operate faster

    @ventrical, have you tried using btrfs with a separate ext4 boot partition? It only needs to be about 100MiB in size.

  7. #37
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    Re: btrfs makes old hdds appear to operate faster

    Quote Originally Posted by cariboo907 View Post
    @ventrical, have you tried using btrfs with a separate ext4 boot partition? It only needs to be about 100MiB in size.

    I'll have to start all over again because partman/ubiquity will not allow me to resize the btrfs which is 30GBs (the whole disk with the excption of a 792MB Swap Area I tried to use the swap area (for ext4) but it wants more space and there is no way I can budge it. Also , Ubiquity does recognize the existing Btrfs filesystem but does not recognize any operating system (hence why it will not give me the option to do a side by side install.

    When I first ventured off on this experiment I took these steps:

    Use Quantal Live USB to install base system with Btrfs format. (no updates, upgrades).
    sudo apt-get install apt-btrfs-snapshot (do test to see if installed - all ok)
    sudo sed -i 's/quantal/raring/g' /etc/apt/sources.list
    sudo apt-get update && sudo apt-get dist-upgrade
    Upon entering the above the snapshot was registered. My experiment was to see if I could roll back to quantal from Raring upgrade. Of course, after the reboot it has failed. I have researched a lot of grub rescue sites .. they are mostly fragmented, do not work and likewise supergrub Rescue disk fails also.
    one moment.

    I think the trick may be that the ext4 filesystem has to be installed first and then btrfs journal as a resized partition.

    Here we go again ..
    Last edited by ventrical; February 11th, 2013 at 11:42 PM.
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  8. #38
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    Re: btrfs makes old hdds appear to operate faster

    btw .. here is ventrical - hard at work on my KVM rack totally dedicated to U+1!!
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    Last edited by ventrical; February 12th, 2013 at 12:35 AM.
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  9. #39
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    Re: btrfs makes old hdds appear to operate faster

    I am back at this on a larger drive/faster machine. Be back in a bit
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  10. #40
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    Re: btrfs makes old hdds appear to operate faster

    Ok... after upgrading to raring it registered the snapshot using apt-btrfs-snapshot.

    ntu1 [42.5 kB]
    Fetched 589 MB in 42min 19s (232 kB/s)
    Supported
    Create a snapshot of '/tmp/apt-btrfs-snapshot-mp-ypT3WB/@' in '/tmp/apt-btrfs-snapshot-mp-ypT3WB/@apt-snapshot-2013-02-11_19:14:23'
    Extracting templates from packages: 100%

    so all I have to do is wait until all the packages are installed and then try to 'rollback' to quantal.

    edit:

    I am suspecting that there are some intracacies in the migration process from one version to another that may inadvertently break the install but otherwise the apt-btrfs-snapshot works excellently. I am assuming this time around there may be a better chance of a rollback to quantal since I have an ext4 jounal filesystem install on the same hdd.
    Last edited by ventrical; February 12th, 2013 at 01:20 AM.
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