How long should mainframe full volume backups and distributed world back ups (data and system backups) be kept offsite?Answer:There is no "industry standard." It's always based on the business requirements of the company in question. I recommend monthly fulls being kept over a year but data is often kept a lot longer than that. (I also recommend daily incrementals and cumulative incrementals/level 1s be kept for 3+ months). As to how long you should retain your long-term data, that's really up to you and how important older data is to your business and whether or not you have any regulatory pressures.
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This was first published in May 2003