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Re: Back-up solutions
I think there's a mix of Back-up and Archive concepts going on here. For backup, being redundant copy of live data that will only be needed if the primary source gets cooked, HD is definately the way to go. The speed/cost really seems to make it the best value. The retrieval time on tape can me maddening. Apples new implementation of snapshots looks like it has potential but I haven't stressed it on 300GB arrays. Archiving, removing data from the primary for occasional access, I use DVD-R. We go one copy on-site and one off. Some of our clients require us to have offsite data storage a minimum 200 miles away. In a small local environment it's reasonable to have a media that can get retrieved and popped into any MAC/PC. The handling does cause scratches and the offsites are needed frequently. We use CDFinder to identify the media needed. In a large distributed environment this doesn't work. Again, the rapidly falling price of disk makes it a more appealing option. At $12,000 for a 3TB or better NAS, you can keep an awful lot of data near line for quick retrieval in a widely distributed environment.
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