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
  • Cylinder partition alignment, partitions starting on logical or physical cylinder boundaries on hard disk drives
  • SSD page partition alignment, partitions starting on NVM page boundaries (with pages typically 4 to 16 KB in size) on SSDs and other flash-based memory devices
  • SSD block partition alignment, partitions starting on NVM block boundaries (typically blocks of 128 to 512 pages) on SSDs and other flash-based memory devices
  • 1 MB partition alignment, partitions starting on 1 MB boundaries
  • RAID stripe alignment, partition alignment based on stripe boundaries

See also
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