viernes, 28 de septiembre de 2007

Fichero backup creado con acronis


Cuando creamos un backup de nuestro sistema con el software acronis, el resultado es un fichero con extensión .tib. Este fichero tendrá el nombre que nosotros le hayamos dado.

Una de las dudas que nos suele venir, es ¿Que hacemos con ese fichero?, ¿Donde lo guardamos?.

Ya que la manera mas sencilla de ver como hacer las cosas es a través de un ejemplo, vamos a imaginarnos el siguiente escenario.

Escenario

Tenemos nuestro servidor de directorio activo, el cual corre bajo un windows 2003 server. Este servidor, tiene un disco duro de 80 gb. en un raid1. A su vez el disco esta particionado en dos volúmenes. Uno el de sistema de 25 gb y otra de 55 gb partición destinada para una función de servidor de ficheros.

Backup
Ahora bien, deseamos tener un backup de las dos particiones a través de un software de imagines, en este caso sera el acronis true image server.
No vamos a entrar en detalle de programaciones , ni periodicidad ni nada de eso. Simplemente tendremos en cuenta que el backup sera del disco duro entero.

¿Donde guardarlo?
Algo que tenemos que evitar es guardar el fichero backup el cualquiera de las dos particiones que tenemos. No es que no se pueda hacer, si no que solo nos va a reportar problemas. Para restaurarlo, en caso de rotura de disco, sistema caído... Vamos a tener un plus de problemas que va a hacer la tarea de restauración sumamente laboriosa

Y como en esto de la informática, ya esta todo inventado, vamos a buscar la solución mas sencilla. Simplemente teniendo en cuenta que debe de ser otro medio diferente, con eso, ya estamos dando un gran paso para facilitarnos la tarea.

Medios
-Si queremos hacerlo en un medio interno, pues colocamos un disco interno, el cual vamos a asignar solamente para tareas de backup
-Medio externo, perfectamente validas las opciones de disco USB, Firewire, Ethernet.... cabina de discos si tiramos la casa por la ventana
-NTFS: Usar un sistema de ficheros NTFS, para que no tener limitación de tamaño de ficheros. por ejemplo si lo creamos sobre una partición fat32 vamos a tener el limite de 4gb.


Mantenimiento del fichero backup
Esta claro que tenemos que tener cuidado con este fichero, ya que si un desastre es que se nos caiga el sistema, mucho mas lo es, si el fichero de recuperación esta dañado.
No hace falta excesivos cuidados, podemos hacer un scandisk,defragmentar el disco o cambiar el tamaño de la partición, que al fichero no le afectan esos cambios en los volúmenes.
Aunque una tarea que si veo obligatoria, es pasarle la herramienta que incluye el propio acronis de verificación de imágenes. Alguna vez si que he visto algún caso, en el que parece que el fichero esta bien, incluso se puede montar, pero a la hora de usarlo para restaurar el sistema, no me ha pasado la verificación, por lo que la restauración ha sido imposible. Desde aquel dia fatal, siempre testeo los ficheros .tib con la herramienta de acronis.

Saludos

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