© 2016 Pearson Education, Inc., Hoboken, NJ. Greater ability to withstand shock and damage © 2016 Pearson Education, Inc., Hoboken, NJ.Better stiffness to reduce disk dynamics.Ability to support lower fly heights (described subsequently).A significant reduction in overall surface defects to help reduce read-write errors.Improvement in the uniformity of the magnetic film surface to increase disk reliability.The glass substrate has a number of benefits, including the following:
More recently, glass substrates have been introduced.
Traditionally, the substrate has been an aluminum or aluminum alloy material. A disk is a circular platter constructed of nonmagnetic material, called the substrate, coated with a magnetizable material. Mayor capacidad para soportar golpes y daños. Una reducción significativa en los defectos generales de la superficie para ayudar a reducir los errores de lectura y escritura Capacidad para soportar alturas de vuelo más bajas Mayor rigidez para reducir la dinámica del disco. Tradicionalmente, el sustrato ha sido un material de aluminio o aleación de aluminio Recientemente se han introducido sustratos de vidrio Beneficios del sustrato de vidrio: Mejora en la uniformidad de la superficie de la película magnética para aumentar la fiabilidad del disco. All rights reserved.ģ Disco Magnético Un disco es un plato circular construido de material no magnético, llamado sustrato, recubierto con un material magnetizable. Memoria Externa © 2016 Pearson Education, Inc., Hoboken, NJ. Then, external optical memory is examined. An increasingly important component of many computer systems is the solid state disk, which is discussed next. The next section examines the use of disk arrays to achieve greater performance, looking specifically at the family of systems known as RAID (Redundant Array of Independent Disks). Magnetic disks are the foundation of external memory on virtually all computer systems. We begin with the most important device, the magnetic disk. This chapter examines a range of external memory devices and systems. William Stallings Computer Organization and Architecture 10th Edition © 2016 Pearson Education, Inc., Hoboken, NJ. Lecture slides prepared for “Computer Organization and Architecture”, 10/e, by William Stallings, Chapter 6 “External Memory”. 1 William Stallings Computer Organization and Architecture 10th Edition
0 kommentar(er)
