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  2. Drive letter assignment - Wikipedia

    en.wikipedia.org/wiki/Drive_letter_assignment

    The Japanese version of the Windows 95 SETUP program supports a special option /AT to enforce that Windows will be on drive C:. Some versions of DOS do not assign the drive letter, beginning with C:, to the first active primary partition recognized upon the first physical hard disk, but on the first primary partition recognized of the first ...

  3. INT 13H - Wikipedia

    en.wikipedia.org/wiki/INT_13H

    INT 13h is shorthand for BIOS interrupt call 13 hex, the 20th interrupt vector in an x86-based (IBM PC-descended) computer system.The BIOS typically sets up a real mode interrupt handler at this vector that provides sector-based hard disk and floppy disk read and write services using cylinder-head-sector (CHS) addressing.

  4. SUBST - Wikipedia

    en.wikipedia.org/wiki/SUBST

    Create the proper registry keys for the host drive letter (optional, works around the host drive label override caveat); Re-create the SUBST drive to see label changes applied. Note that the LABEL command is NOT able to change the label name of a drive letter created using subst. [8] LABEL is one of several commands that only work on physical ...

  5. List of disk drive form factors - Wikipedia

    en.wikipedia.org/wiki/List_of_disk_drive_form...

    SFF-8301 includes drive heights of 17.80, 26.10, and 42.00mm, but as of 2025, no drives are produced in 42mm height. Drives with heights not mentioned in SFF-8301 are manufactured, e.g. Seagate 19.99-mm-high drives [5] and a Samsung low-profile single-disc drive with a height of 18.288 millimetres (0.72 in). [3]

  6. Self-Monitoring, Analysis and Reporting Technology - Wikipedia

    en.wikipedia.org/wiki/Self-Monitoring,_Analysis...

    The disk drives would measure the disk's "health parameters", and the values would be transferred to the operating system and user-space monitoring software. Each disk drive vendor was free to decide which parameters were to be included for monitoring, and what their thresholds should be. The unification was at the protocol level with the host.

  7. 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 ...

  8. BIOS interrupt call - Wikipedia

    en.wikipedia.org/wiki/BIOS_interrupt_call

    BIOS interrupt calls perform hardware control or I/O functions requested by a program, return system information to the program, or do both. A key element of the purpose of BIOS calls is abstraction - the BIOS calls perform generally defined functions, and the specific details of how those functions are executed on the particular hardware of the system are encapsulated in the BIOS and hidden ...

  9. Hard disk drive failure - Wikipedia

    en.wikipedia.org/wiki/Hard_disk_drive_failure

    However, S.M.A.R.T. parameters alone may not be useful for predicting individual drive failures. [16] While several S.M.A.R.T. parameters affect failure probability, a large fraction of failed drives do not produce predictive S.M.A.R.T. parameters. [16] Unpredictable breakdown may occur at any time in normal use, with potential loss of all data.