ECHS
Updated: 11/13/2018 by Computer Hope
Alternatively known as large mode, ECHS (extended cylinder-head-sector) or extended CHS (cylinder-head-sector) is an access mode used by computers to assign addresses to data on a hard drive that is larger than 504 MB. Although this mode does allow a computer to have a larger hard drive, today this mode is replaced with other modes such as LBA (large block addressing).