Nice point, Fred. Agreed, disk isn't always perfect either. I do have some clients who selectively back up to both disk and tape, but not all system backups - just those where the risk is too high to accept (email is one example).
The variety of backup strategies available to companies are many nowadays, and I think variety is generally good thing. The trick is to figure out what mix works best for your specific organization, based on industry, lit profile, risk tolerance, etc.
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On Jun 15, 2012, at 9:59 AM, Frederic Grevin <[log in to unmask]> wrote:
> Julie Colgan said "Disk can offer the same security features of tape".
>
> Not always.
>
> Remember the little incident last year when Google "lost" 30,000+ email accounts? It turned out there was buggy code in a software update which caused the loss. The disk-based backups had copied the buggy code, so they could not be used to restore the email accounts. Fortunately, Google had also maintained a tape backup system, which successfully restored the email accounts. See http://blogs.wsj.com/digits/2011/03/01/tape-rescues-google-in-lost-email-scare/
>
> I'd say the prudent solution is to use both disk backup and tape backup. It costs more, but what is your data worth if you lose it?
>
> Fred
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