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-Rpeters13:25, 24 August 2012 (EST) --

definition list
definition list

For General Users

Advanced Format (AF) Hard Disk Drives are used in many pre-built computers and USB drives from about 2011 onwards.. By way of explanation

  • AF drives have 4 kB hard sectors in lieu of
  • the traditional 512 B sectors


  • much faster (less disk overhead)
  • more space efficient (larger disk capacity from same hardware)
  • overcomes immutable capacity limit of ~2.1 TeraByte for conventional drives


  • Windows 32 bit systems cannot boot from AF drives
    • requires driver from HDD manufacturer, to use as data only internal drives

No action is required by the typical purchaser, because the manufacturer will have taken care of the special formatting required with AF drives. Getting Technical below, provides guidelines for those needing to:

  • repartition drives
  • install new, "bare" drives

Getting Technical

Getting Technical

Advanced Format Drives

�*performance loss of up to 40% if reformatted MBR. New HDD from about 2011 onwards are likely to be Advance Formatted

  • usually pre-formatted
  • likely to be stated on drive or packaging
  • essential for drives over 2.1 TeraByte capacity
  • has been used on new drives as small as 250GB


Drives up to 2.1 TB,manufactured during the transitional period, logically divide each 4kB sector into eight 512 B sectors

  • permits partitioning using legacy programs
  • deprecated because doing so can decrease performance up to 40%
    • essential for boot drives in Windows 32 bit systems
(such drives have no

Strictly for Geeks