Editing Elevator algorithm (section)

== Description ==

When a new request arrives while the drive is idle, the initial arm/head movement will be in the direction of the cylinder where the data is stored, either ''in'' or ''out''.  As additional requests arrive, requests are serviced only in the current direction of arm movement until the arm reaches the edge of the disk. When this happens, the direction of the arm reverses, and the requests that were remaining in the opposite direction are serviced, and so on.<ref>{{cite web |url=http://www.dcs.ed.ac.uk/home/stg/pub/D/disk.html  |title=Disk scheduling |accessdate=2008-01-21 |archiveurl = https://web.archive.org/web/20080606005055/http://www.dcs.ed.ac.uk/home/stg/pub/D/disk.html |archivedate = 2008-06-06}}</ref>