On Thu, 12 Feb 2009, Tim Kirby wrote: > It's possible that in the future a BluRay drive would be an > alternative, but that's still only what, maybe 50GB? Tapes > can hold a lot more, and we are talking about several hundred > GB or more. Yes, you could write it to a couple of 1TB disks, > but (as mentioned elsewhere), I don't want to spin it for five > or 10 years; there are handy "removable disk units" which sound > good, but I haven't seen one with an autoloader, so it's manual > intervention every time it's needed.
I actually did see one system that used a LTO library and packaged 2.5" drives in plastic cases to fit the library that would do the autoloading stuff. > Pulling it back over "the wire" is sort of an option, but with > large amounts of data it can take a long time (unless you have > lot of bandwidth :) > > As the old saying goes, 'never understimate the bandwidth of > a station wagon full of tapes...' no kidding, I just recently did the calculations for a disaster orginization of what this would be (in that case, data transfered by air from the disaster area) say 48 2TB drives (1-2 cases, not that much), one trip per day is about 1Gb/sec and at ~50MB/sec read/write speed for hard drives you would need 40+ drives active at any one time to read/write this data in 24 hours. David Lang _______________________________________________ Tech mailing list [email protected] http://lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
