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  2. Boot sector - Wikipedia

    en.wikipedia.org/wiki/Boot_sector

    When GRUB is installed on a hard disk, boot.img is written into the boot sector of that hard disk. boot.img has a size of only 446 bytes. A boot sector is the sector of a persistent data storage device (e.g., hard disk , floppy disk , optical disc , etc.) which contains machine code to be loaded into random-access memory (RAM) and then executed ...

  3. BIOS parameter block - Wikipedia

    en.wikipedia.org/wiki/BIOS_parameter_block

    — Figure 4.3 contains a diagram of the version 4.0 BPB and states that the layout of BPBs "is not defined by Microsoft and can vary with different vendors". At the time that the book was written, this was true. Microsoft first publicly documented the BPB structure in the OS/2 Developers' Toolkit. Verstak, Alex (1998-03-10). "FAT Boot Sector".

  4. Bootloader - Wikipedia

    en.wikipedia.org/wiki/Bootloader

    In floppy and superfloppy volume boot records, up to 59 bytes are occupied for the extended BIOS parameter block (EBPB) on FAT12 and FAT16 volumes since DOS 4.0, whereas the FAT32 EBPB introduced with DOS 7.1 requires even 87 bytes, leaving only 423 bytes for the boot loader when assuming a sector size of 512 bytes. Microsoft boot sectors ...

  5. Volume boot record - Wikipedia

    en.wikipedia.org/wiki/Volume_boot_record

    The boot code in the VBR can assume that the BIOS has set up its data structures and interrupts and initialized the hardware. The code should not assume more than 32 KB of memory to be present for fail-safe operation; [1] if it needs more memory it should query INT 12h for it, since other pre-boot code (such as f.e. BIOS extension overlays, encryption systems, or remote bootstrap loaders) may ...

  6. NTLDR - Wikipedia

    en.wikipedia.org/wiki/NTLDR

    The code in the boot sector of the active partition could then be again a NTLDR boot sector looking for ntldr in the root directory of this active partition. In a more convoluted scenario the active partition can contain a Vista boot sector for the newer Vista boot manager with an {ntldr} entry pointing to another partition with a NTLDR boot ...

  7. EFI system partition - Wikipedia

    en.wikipedia.org/wiki/EFI_System_partition

    On Apple Mac computers using Intel x86-64 processor architecture, the EFI system partition is initially left blank and unused for booting into macOS. [13] [14]However, the EFI system partition is used as a staging area for firmware updates [15] and for the Microsoft Windows bootloader for Mac computers configured to boot into a Windows partition using Boot Camp.

  8. System partition and boot partition - Wikipedia

    en.wikipedia.org/wiki/System_partition_and_boot...

    Since Windows NT 3.1 (the first version of Windows NT), [4] Microsoft has defined the terms as follows: The system partition (or system volume) [5] is a primary partition that contains the boot loader, a piece of software responsible for booting the operating system. [6]: 1087 This partition holds the boot sector and is marked active. [7]: 970

  9. Boot folder - Wikipedia

    en.wikipedia.org/wiki/Boot_folder

    boot.xxyy – these 512-byte files are backups of boot sectors, either the master boot record (MBR) or volume boot record (VBR), created when LILO overwrites a boot sector. xx and yy are the major and minor device numbers in hex; [ 5 ] for example, the drive sda has numbers 8, 0, hence its MBR is backed up to boot.0800 while the partition sda3 ...

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