What program(s) is stored in a small partition on my hard drive with flags `bios_grub`?












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My old laptop uses BIOS. It came with Windows installed, and later I installed Ubuntu by overwriting Windows.



What program(s) is stored in a small partition on my hard drive with flags bios_grub, shown by parted? It can't store BIOS, because BIOS is stored in ROM, not in disk. It can't store what is stored in MBR or GPT, because MBR and GPT are stored in disk but not in any partition.



What is the purpose of the partition?
Is the partition used when booting Ubuntu? Or was it used only when Windows was installed on the laptop?



When booting Ubuntu, BIOS loads the bootloader program form the MBR of a boot disk, which in turn loads the remaining boot loader program from the boot block of a boot partition. Is the small partition with flag bios_grub involved in booting OS process in any way?



Thanks.



$ sudo parted -l
[sudo] password for t:
Model: ATA ST1000LM014-1EJ1 (scsi)
Disk /dev/sda: 1000GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:

Number Start End Size File system Name Flags
1 1049kB 2097kB 1049kB bios_grub
2 2097kB 16.0GB 16.0GB linux-swap(v1)
4 116GB 716GB 600GB ext4
3 716GB 1000GB 284GB ext4









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    0















    My old laptop uses BIOS. It came with Windows installed, and later I installed Ubuntu by overwriting Windows.



    What program(s) is stored in a small partition on my hard drive with flags bios_grub, shown by parted? It can't store BIOS, because BIOS is stored in ROM, not in disk. It can't store what is stored in MBR or GPT, because MBR and GPT are stored in disk but not in any partition.



    What is the purpose of the partition?
    Is the partition used when booting Ubuntu? Or was it used only when Windows was installed on the laptop?



    When booting Ubuntu, BIOS loads the bootloader program form the MBR of a boot disk, which in turn loads the remaining boot loader program from the boot block of a boot partition. Is the small partition with flag bios_grub involved in booting OS process in any way?



    Thanks.



    $ sudo parted -l
    [sudo] password for t:
    Model: ATA ST1000LM014-1EJ1 (scsi)
    Disk /dev/sda: 1000GB
    Sector size (logical/physical): 512B/4096B
    Partition Table: gpt
    Disk Flags:

    Number Start End Size File system Name Flags
    1 1049kB 2097kB 1049kB bios_grub
    2 2097kB 16.0GB 16.0GB linux-swap(v1)
    4 116GB 716GB 600GB ext4
    3 716GB 1000GB 284GB ext4









    share|improve this question

























      0












      0








      0








      My old laptop uses BIOS. It came with Windows installed, and later I installed Ubuntu by overwriting Windows.



      What program(s) is stored in a small partition on my hard drive with flags bios_grub, shown by parted? It can't store BIOS, because BIOS is stored in ROM, not in disk. It can't store what is stored in MBR or GPT, because MBR and GPT are stored in disk but not in any partition.



      What is the purpose of the partition?
      Is the partition used when booting Ubuntu? Or was it used only when Windows was installed on the laptop?



      When booting Ubuntu, BIOS loads the bootloader program form the MBR of a boot disk, which in turn loads the remaining boot loader program from the boot block of a boot partition. Is the small partition with flag bios_grub involved in booting OS process in any way?



      Thanks.



      $ sudo parted -l
      [sudo] password for t:
      Model: ATA ST1000LM014-1EJ1 (scsi)
      Disk /dev/sda: 1000GB
      Sector size (logical/physical): 512B/4096B
      Partition Table: gpt
      Disk Flags:

      Number Start End Size File system Name Flags
      1 1049kB 2097kB 1049kB bios_grub
      2 2097kB 16.0GB 16.0GB linux-swap(v1)
      4 116GB 716GB 600GB ext4
      3 716GB 1000GB 284GB ext4









      share|improve this question














      My old laptop uses BIOS. It came with Windows installed, and later I installed Ubuntu by overwriting Windows.



      What program(s) is stored in a small partition on my hard drive with flags bios_grub, shown by parted? It can't store BIOS, because BIOS is stored in ROM, not in disk. It can't store what is stored in MBR or GPT, because MBR and GPT are stored in disk but not in any partition.



      What is the purpose of the partition?
      Is the partition used when booting Ubuntu? Or was it used only when Windows was installed on the laptop?



      When booting Ubuntu, BIOS loads the bootloader program form the MBR of a boot disk, which in turn loads the remaining boot loader program from the boot block of a boot partition. Is the small partition with flag bios_grub involved in booting OS process in any way?



      Thanks.



      $ sudo parted -l
      [sudo] password for t:
      Model: ATA ST1000LM014-1EJ1 (scsi)
      Disk /dev/sda: 1000GB
      Sector size (logical/physical): 512B/4096B
      Partition Table: gpt
      Disk Flags:

      Number Start End Size File system Name Flags
      1 1049kB 2097kB 1049kB bios_grub
      2 2097kB 16.0GB 16.0GB linux-swap(v1)
      4 116GB 716GB 600GB ext4
      3 716GB 1000GB 284GB ext4






      boot partition grub boot-loader bios






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      asked 10 mins ago









      TimTim

      27.2k78262472




      27.2k78262472






















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