Short for cylinder-head-sector, CHS is a computer access mode that assigns addresses to data on computer hard drives. This access mode was used with early hard drives (hard drives below 550 MB before 1990). Today, this mode is replaced with ECHS and LBA.

Computer acronyms, Cylinder, ECHS, Hard drive terms, Head, LBA, Sector, ZBR

  • Why is my hard drive only being seen as 504, 528, or 540 MB?
  • Hard drive help and support.