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27 de Junio del 2007  artículo patrocinado
Este es un artículo patrocinado. Para más información, pulsa en la imagen de la derecha.
En The History of Backup nos encontramos con un exhaustivo repaso a la historia de la tecnología asociada a los procesos de backup, es decir, el respaldo de información guardada en forma de bases de datos, y su posibilidad de recuperación en caso de pérdida.
MaximYurin, el autor de la página, empieza el recorrido histórico por las ya obsoletas tarjetas perforadas, que pueden ser consideradas el primer dispositivo de almacenamiento utilizado como backup, y que eran empleadas, por ejemplo en el UNIVAC al principio de los años 50.
Pero no es hasta la llegada de los sistemas de almacenamiento de tipo magnético (discos duros, floppies, cintas,…) cuando lastécnicas de backup (automatizadas o manuales) se imponen en el mundo de la computación.
El artículo prosigue con detalle en la historia de los backup incluyendo los actuales medios de almacenamiento masivo de tipo óptico (CD, DVD, Blue-Ray, HD-DVD,…) y con memoria Flash (pendrives USB,…). Mención especial merece el apartado dedicado a los sistemas de backup en línea y cómo la evolución de las redesde datos han cambiado el concepto de backup hoy en día.
El artículo termina con una clarificadora figura en la que se resume de forma gráfica la evolución de los distintos medios y tecnologías de backup a lo largo del tiempo.
The History of Backup es, en definitiva, un buen resumen del tema a pesar de su brevedad (apenas una página con unos pocos enlaces y figuras).
Introduction: Computer databackup is a fast developing field nowadays. New trends and solutions appear, backup methods and technologies become more complex. Need complete knowledge of backup technology, related features and methods? A look at its history will definitely help.

Backup is the activity of copying files or databases, so that their additional copies may be restored in case of a data loss accident. Thus, we canemphasize first two aspects related to backup - storage media for data and depositories for backup media. Another important aspect is growing necessity in backup caused by development of computer technologies and data volumes expansion.

In this article we will take a retrospective look at these aspects. We will examine why the need in backup appeared, expansion and development of backup, themost important events and trends in this sphere, and watch the evolution of data backup storage solutions and methods.

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The first computer backups were made onto big reels of magnetic tape, and even paper: punch cards and paper tape. In the next era, backups were mostly stored on floppy disks of various sizes. But today’s PCs don’teven have floppy drives, not to mention punch card processing devices. Backups are now written on CDs, hard drives, flash drives or via network. But some technologies, such as tape backup, still remain very popular and develop. Let’s take a closer look at the history of these devices and methods and try to correlate them with backup.

Punch Card Backups as a Reference Point in Backup HistoryIn 1951, the first generation of digital computing appeared when the UNIVAC I (Universal Automatic Computer) was built by Mauchly and Eckert. It used vacuum tubes as main logic elements, rotating magnetic drums for internal storage of data and programs and punch cards to input and externally store data.

Thus, punch cards can be considered as the first data storage devices for backup. Of course,we can’t talk about holistic and centralized backup methods and strategies when it comes to punch card backups. But they essentially correspond to the definition of backup given in the beginning, because the additional copies of punch cards were made also to restore data in case of a loss.

For more info about punch cards see: Punched Cards, by Douglas W. Jones, THE UNIVERSITY OF IOWA...
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