In a GFS scheme the daily backup tapes should probably be replaced each year or so and the weekly and monthly tapes (assuming the monthly tapes aren't archived) accordingly. Read this tutorial to find out so much more.
This document is a 7-step guide for making the move from tape to disk backup with deduplication. Within these steps, the Guide provides a concise summary of the downsides of tape backup, and then examines the superiority and economy of second-generation disk backup with data deduplication.
Since the cost comparison between tape and disk is obviously far more complex than the media itself, this brief outlines all the considerations necessary for a more complete understanding of the benefit and true cost comparison between tape and disk to help IT professionals choose and justify their backup environment.
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