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    • How to reinstall bootloader GRUB?
    Community Discussion 1049 views · 5 replies ·
    Tofloor
    poster avatar
    lamasg
    deepin
    2018-02-04 00:24
    Author
    1. So I installed another Linux distro (for testing purposes) on top my existing Windows+Deepin 15.5 dual boot setup
    2. After this, the bootloader was changed from Deepin's version to the new distro's version. Everything is fine as i can boot into Deepin via the new distro's bootloader

    3. I then wiped the partition containing the new distro (at this point I still have Windows+Deepin)

    4. But when I reboot, the deepin's bootloader is not there.

    How do I get the blue Deepin bootloader screen back?

    I have two drives SSD + HDD

    Here is how partitions look right now

    SSD (sda)

    Disk /dev/sda: 111.8 GiB

    Device         Start       End   Sectors  Size Type
    /dev/sda1       2048    923647    921600  450M Windows recovery enviro
    /dev/sda2     923648   1126399    202752   99M Microsoft basic data
    /dev/sda3    1128448   1161215     32768   16M Microsoft reserved
    /dev/sda4    1161216 132340325 131179110 62.6G Microsoft basic data
    /dev/sda5  132341760 134084607   1742848  851M Windows recovery environment
    /dev/sda6  134084608 134289407    204800  100M EFI System
    /dev/sda7  134289408 135313407   1024000  500M Linux filesystem
    /dev/sda8  135313408 234440703  99127296 47.3G Linux filesystem

    HDD (sdb)

    Disk /dev/sdb: 931.5 GiB

    Device          Start        End   Sectors   Size Type
    /dev/sdb1          34     262177    262144   128M Microsoft reserved
    /dev/sdb2      264192  909449215 909185024 433.5G Microsoft basic data
    /dev/sdb3   909449216  970481663  61032448  29.1G Microsoft basic data
    /dev/sdb4   970481664 1116792831 146311168  69.8G Linux filesystem
    /dev/sdb5  1116792832 1125181439   8388608     4G Linux filesystem
    /dev/sdb6  1125181440 1175281663  50100224  23.9G Linux filesystem
    /dev/sdb7  1175283712 1890607103 715323392 341.1G Microsoft basic data


    sda7 used to be the Deepin Bootloader location.
    sda8 is /
    sdb4 is /home
    sdb5 is /tmp
    sdb6 is /var

    sda6 is Windows 10

    Thanks
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    All Replies
    homma
    deepin
    2018-02-04 01:11
    #1
    本帖最后由 homma 于 2018-2-3 17:14 编辑

    Try update-grub in the latest Linux system which you installed .Then,reboot and you could see Deepin's bootloader.

    hello！你好

    Reply View the author
    Comments
    wangqizai1918
    2018-02-04 03:20
    After this, the bootloader was changed from Deepin's version to the new distro's version. Everything is fine as i can boot into Deepin via the new distro's bootloader
    homma
    deepin
    2018-02-04 01:18
    #2
    BISO+MBR way may works well on multiplied OS system
    Reply View the author
    homma
    deepin
    2018-02-04 01:19
    #3
    I'm not good at Einglish.
    Reply View the author
    lamasg
    deepin
    2018-02-04 01:59
    #4
    As mentioned, I deleted new distro after testing ( by wiping that partition ). My /dev/sda7 still has Deepin bootloader but it  doesnot load. Any step by step instructions would be great. Thanks a lot
    Reply View the author
    lamasg
    deepin
    2018-02-04 21:12
    #5
    Ok I solved it. Although I did a lot of things so I am not sure what actually caused to solve the problem.

    1. I installed new Deepin overriding my sda7 patition as an EFI partition

    2. I then restore my old Deepin's sda7 partition into this newly created EFI partition (using Clonezilla for backup and restore). In short I overwrote the sda7 partition with restored version.

    3. I then updated the new Deepin.
    1. sudo apt dist-upgrade -y
    Copy the Code


    4. After reboot I can now see Boot option for the old Deepin alongside the newone.
    Reply View the author