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Thread: mount and unmount ext4

  1. #1
    Join Date
    Dec 2012
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    mount and unmount ext4

    Hi everybody!

    I try to mount a partition in ext4, and i was following this french thread :
    http://forum.ubuntu-fr.org/viewtopic.php?id=383127

    but, i was stuk at 2 line (of command) next the end....
    It was possible to view the /media/video in ext4, but it was impossible to write on it...
    And i saw a folder in /media/video, is name was lost&found, like the home folder, before the user....

    And after i was bored of this so i start Gparted, unmount, format in ntfs format...
    (cuz it just for data...)

    Now each time i reboot, the system stop, and i need to press F1, to see a message that display my raid device ok, and an other message to skip /media/video or mount manually.....But this /media/video doesn't exist at all cuz i format it! But i think somewhere there some piece of it??
    And i can't unmount it, cuz it not mount anymore, but the system still recognize it!!??

    I'm using kubuntu 12.10...
    What do you think?

    Thank!

  2. #2
    Join Date
    Jul 2005
    Location
    England
    Beans
    13,578

    Re: mount and unmount ext4

    You will need to edit your fstab file to take account of the new NTFS partition with its new UUID.

    Let's see the output of
    Code:
    sudo blkid -c /dev/null
    and your current /etc/fstab file from
    Code:
    cat /etc/fstab
    Tell us which is the new NTFS partition and we'll tell you how to proceed.
    DISTRO: Xubuntu 12.04-64bit --- Boot-Repair --- Grub2 wiki & Grub2 Basics --- RootSudo

  3. #3
    Join Date
    Dec 2012
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    17

    Re: mount and unmount ext4

    sudo blkid -c /dev/null

    /dev/sda5: LABEL="Video" UUID="249ED17813DAC901" TYPE="ntfs"
    /dev/sdb1: LABEL="Muzik" UUID="0E3707AB531F6B89" TYPE="ntfs"
    /dev/sdc1: UUID="c417d56a-2553-63d4-fb12-7e256da4b3ec" UUID_SUB="3c6e3b31-f992-b4a6-f4eb-9d643ed100e9" LABEL="Kubuntu:0" TYPE="linux_raid_member"
    /dev/sdc5: UUID="2c4b4a12-491f-4508-d6c0-920edec0de3f" UUID_SUB="474dbf51-d3a7-cc8b-973a-d0dd144343c8" LABEL="Kubuntu:1" TYPE="linux_raid_member"
    /dev/sdc6: UUID="79a172b3-1303-bfec-9e62-b0e9696df99a" UUID_SUB="df5a2c03-ca09-4121-c27b-edf63ce2ef2f" LABEL="Kubuntu:2" TYPE="linux_raid_member"
    /dev/sdc7: UUID="eaea29cc-aa5d-2329-708e-d31765aed3b5" UUID_SUB="921a55e9-a8be-3fea-1394-54d6da444510" LABEL="Kubuntu:3" TYPE="linux_raid_member"
    /dev/sdd1: UUID="c417d56a-2553-63d4-fb12-7e256da4b3ec" UUID_SUB="c445ca23-9e60-4f19-e477-2c1fc099773e" LABEL="Kubuntu:0" TYPE="linux_raid_member"
    /dev/sdd5: UUID="2c4b4a12-491f-4508-d6c0-920edec0de3f" UUID_SUB="31dcdcd9-052e-7de4-4bde-b34ee76ee887" LABEL="Kubuntu:1" TYPE="linux_raid_member"
    /dev/sdd6: UUID="79a172b3-1303-bfec-9e62-b0e9696df99a" UUID_SUB="39fc5c98-dd62-cd44-2b83-9ca9042c4cf9" LABEL="Kubuntu:2" TYPE="linux_raid_member"
    /dev/sdd7: UUID="eaea29cc-aa5d-2329-708e-d31765aed3b5" UUID_SUB="ae4cf8aa-f7bd-2e51-fbbb-f01fe7df04d8" LABEL="Kubuntu:3" TYPE="linux_raid_member"
    /dev/md3: UUID="19ba70ef-88b9-40bb-ab26-a1d13dd15651" TYPE="ext4"
    /dev/md2: UUID="c91fe897-9d5e-4806-a882-90657d9a3f79" TYPE="swap"
    /dev/md1: UUID="c870adbe-86b7-49ad-8aad-fc1b6845ec8e" TYPE="ext4"
    /dev/md0: UUID="fff7cf19-238f-4d38-9a55-0c42fab54e2e" TYPE="ext4"
    /dev/sr2: LABEL="Clickfree_System" TYPE="iso9660"
    /dev/sde1: LABEL="Backup" UUID="8C2847092846F22E" TYPE="ntfs"


    cat /etc/fstab

    /etc/fstab: static file system information.
    #
    # <file system> <mount point> <type> <options> <dump> <pass>

    proc /proc proc nodev,noexec,nosuid 0 0
    #Entry for /dev/md1 :
    UUID=c870adbe-86b7-49ad-8aad-fc1b6845ec8e / ext4 errors=remount-ro 0 1
    #Entry for /dev/md0 :
    UUID=fff7cf19-238f-4d38-9a55-0c42fab54e2e /boot ext4 defaults 0 2
    #Entry for /dev/sda5 :
    UUID=b64e6e57-9c6e-4931-a3dd-d5dec9aece1c /media/Video ext4 defaults 0 2
    #Entry for /dev/sdb1 :
    UUID=0E3707AB531F6B89 /media/Muzik ntfs defaults,nosuid,nodev,uhelper=udisks,uid=1000,gid= 1000,dmask=0077,fmask=0177 00
    #Entry for /dev/md3 :
    UUID=19ba70ef-88b9-40bb-ab26-a1d13dd15651 /home ext4 defaults 0 2
    #Entry for /dev/md2 :
    UUID=c91fe897-9d5e-4806-a882-90657d9a3f79 none swap sw0 0

    Thanks for your help again )
    Last edited by Mascarade; January 31st, 2013 at 04:57 PM.

  4. #4
    Join Date
    Jul 2005
    Location
    England
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    13,578

    Re: mount and unmount ext4

    First backup fstab with
    Code:
    sudo cp /etc/fstab /etc/fstabbak
    just in case.

    I am assuming the lines
    Code:
    #Entry for /dev/sda5 :
    UUID=b64e6e57-9c6e-4931-a3dd-d5dec9aece1c       /media/Video    ext4      defaults        0       2
    in your current fstab are those for the partition, now ntfs, that you want to mount automatically at boot.

    Edit those lines to
    Code:
    #Entry for /dev/sda5
    UUID=249ED17813DAC901 /media/Video/    ntfs-3g        auto,user,rw 0 0
    Save the file and then run
    Code:
    sudo mount -a
    If there is no error message, the partition will be mounted and all should be OK at next boot.
    DISTRO: Xubuntu 12.04-64bit --- Boot-Repair --- Grub2 wiki & Grub2 Basics --- RootSudo

  5. #5
    Join Date
    Dec 2012
    Beans
    17

    Re: mount and unmount ext4

    Hi again amigo

    Just to be sure we are understanding each other....
    my partition ntfs is ok, she mount automatically, the probleme is the ancian partition ext4 on the same drive that cause a probleme even if i format it whit gparted many time......the ext4 is not mounted.....

    i try what you told me...
    i backup the fstab
    at the second command the konsole said that it is a directory and the last command said that uuid....does not exist?

    let see:

    mascarade@Kubuntu:~$ sudo cp /etc/fstab /etc/fstabbak
    [sudo] password for mascarade:
    mascarade@Kubuntu:~$ #Entry for /dev/sda5
    mascarade@Kubuntu:~$ UUID=249ED17813DAC901 /media/Video/ ntfs-3g auto,user,rw 0 0
    bash: /media/Video/: Is a directory
    mascarade@Kubuntu:~$ UUID=249ED17813DAC901 /media/Video/ ntfs-3g auto,user,rw 0 0
    bash: /media/Video/: Is a directory
    mascarade@Kubuntu:~$ sudo mount -a
    mount: special device UUID=b64e6e57-9c6e-4931-a3dd-d5dec9aece1c does not exist

    I just want to kill the ext4 ghostpartition

    I try to reboot and i get the same message : /media/video is not ready or present....

    not to strange?
    Last edited by Mascarade; January 31st, 2013 at 06:58 PM.

  6. #6
    Join Date
    Jul 2005
    Location
    England
    Beans
    13,578

    Re: mount and unmount ext4

    Sorry but I think you completely misunderstood my post.
    Does that ntfs partition automount at boot? There is no fstab entry for it so it should not do so, but you should be able to mount it by clicking on it in dolphin or whatever filemanager you use.

    Also, I was not meaning you to enter
    Code:
    #Entry for /dev/sda5 :
    UUID=b64e6e57-9c6e-4931-a3dd-d5dec9aece1c       /media/Video    ext4      defaults        0       2
    in a terminal as you did, but merely quoting your current fstab where those lines point to the old ext4 partition, now ntfs, that you want to mount automatically at boot.

    Edit those lines using
    Code:
    kdesu kate /etc/fstab
    in terminal, which will open fstab as root, and change them to
    Code:
    #Entry for /dev/sda5
    UUID=249ED17813DAC901 /media/Video/    ntfs-3g        auto,user,rw 0 0
    Save the file and then run
    Code:
    sudo mount -a
    If there is no error message, the partition will be mounted and all should be OK at next boot.[/QUOTE]
    DISTRO: Xubuntu 12.04-64bit --- Boot-Repair --- Grub2 wiki & Grub2 Basics --- RootSudo

  7. #7
    Join Date
    Dec 2012
    Beans
    17

    Re: mount and unmount ext4

    Hi ajgreeny sorry for taking time to respons But now i really understand fstab! All work fine
    The only thing is : if i have a partition like ntfs and i use gparted to delete and make a new ntfs drive why the partiton that is supposed to be delete still remaid in my /media???

    There is my new fstab

    #Entry for /dev/md0 :
    UUID=79aef55b-dbcc-463b-b1b6-df7f9b88ea0d / ext4 errors=remount-ro 0 1
    #Entry for /dev/sdc1 :
    UUID=4dd8dcd4-6648-4c47-a4fa-a596e7de50a2 /boot ext4 defaults 02
    #Entry for /dev/sda1 :
    UUID=1DDB403525E3D2AA /media/Repair_Data ntfs-3g auto,user,rw 0 0
    #Entry for /dev/sdb1 :
    UUID=13FEEB97588C9CED /media/Data ntfs-3g defaults,rw,user,auto,locale=en_CA.UTF-8 0 0
    #Entry for /dev/md1 :
    UUID=4c6114de-6b81-46ac-8317-50c6a70bf698 /home ext4 defaults 02
    #Entry for /dev/sdd5 :
    UUID=2d463d94-c7fe-49ee-bf27-696d034f9728 none swap sw 0 0

    but i my /media i got my repair Data and Data partition (ntfs) and the old one that are not present in /etc/fstab....why?
    Can i remove it?
    Last edited by Mascarade; March 6th, 2013 at 12:57 AM.

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