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  2. Drive letter assignment - Wikipedia

    en.wikipedia.org/wiki/Drive_letter_assignment

    Assign subsequent drive letters to the first primary partition upon each successive physical hard disk drive (DOS versions prior to 5.0 will probe for only two physical hard disks, whereas DOS 5.0 and higher support eight physical hard disks). Assign subsequent drive letters to every recognized logical partition present in the first extended ...

  3. Disk partitioning - Wikipedia

    en.wikipedia.org/wiki/Disk_partitioning

    IBM in its 1983 release of PC DOS version 2.0 was an early if not first use of the term partition to describe dividing a block storage device such as an HDD into physical segments. The term's usage is now ubiquitous. [citation needed] Other terms used include logical disk, [4] minidisk, [5] portions, [6] pseudo-disk, [6] section, [6] slice [7 ...

  4. GUID Partition Table - Wikipedia

    en.wikipedia.org/wiki/GUID_Partition_Table

    For hard disks with 512‑byte sectors, the MBR partition table entries allow a maximum size of 2 TiB (2³² × 512‑bytes) or 2.20 TB (2.20 × 10¹² bytes). [1] In the late 1990s, Intel developed a new partition table format as part of what eventually became the Unified Extensible Firmware Interface (UEFI). The GUID Partition Table is ...

  5. Disk sector - Wikipedia

    en.wikipedia.org/wiki/Disk_sector

    The sector is the minimum storage unit of a hard drive. [2] Most disk partitioning schemes are designed to have files occupy an integral number of sectors regardless of the file's actual size. Files that do not fill a whole sector will have the remainder of their last sector filled with zeroes.

  6. Partition type - Wikipedia

    en.wikipedia.org/wiki/Partition_type

    The partition type (or partition ID) in a partition's entry in the partition table inside a master boot record (MBR) is a byte value intended to specify the file system the partition contains or to flag special access methods used to access these partitions (e.g. special CHS mappings, LBA access, logical mapped geometries, special driver access, hidden partitions, secured or encrypted file ...

  7. Boot sector - Wikipedia

    en.wikipedia.org/wiki/Boot_sector

    If the device is a floppy or USB flash drive, that will be a VBR. If the device is a hard disk, that will be an MBR. It is the code in the MBR which generally understands disk partitioning, and in turn, is responsible for loading and running the VBR of whichever primary partition is set to boot (the active partition). The VBR then loads a ...

  8. Disk formatting - Wikipedia

    en.wikipedia.org/wiki/Disk_formatting

    A block, a contiguous number of bytes, is the minimum unit of storage that is read from and written to a disk by a disk driver.The earliest disk drives had fixed block sizes (e.g. the IBM 350 disk storage unit (of the late 1950s) block size was 100 six-bit characters) but starting with the 1301 [8] IBM marketed subsystems that featured variable block sizes: a particular track could have blocks ...

  9. Partition alignment - Wikipedia

    en.wikipedia.org/wiki/Partition_alignment

    Partition alignment is the proper alignment of partitions to the boundaries available in a data storage device. Examples include the following: 4 KB sector alignment with hard disk drives supporting Advanced Format (AF) Track partition alignment, partitions starting on track boundaries on hard disk drives

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