mcanthony/node-chs

Cylinder-Head-Sector Address

CHS (Cylinder-Head-Sector) Address

CHS addressing is an early method for giving addresses to each physical block of data on a hard disk drive, identifying individual sectors on a disk by their position in a track, where the track is determined by the head and cylinder numbers.

Install via npm

$ npm install chs

Usage

// Load module
var CHS = require( 'chs' )

// Create a CHS address
var addr = new CHS( 5, 20, 8 )

// Properties:
var c = addr.cylinder
var h = addr.head
var s = addr.sector

// Convert to an LBA (Logical Block Address)
var lba = addr.toLBA( headsPerTrack, sectorsPerTrack )
var lba = addr.toLBA( 12, 32 )

// Set it to an LBA
addr.setLBA( lba, headsPerTrack, sectorsPerTrack )
addr.setLBA( 3150, 16, 63 )

// Get it as a buffer
var buf = addr.buffer

// Set from buffer
addr.buffer = new Buffer([ 0xFE, 0xFF, 0xFF ])