There have been a raft of tape announcements in the last week, most notably the two 1TB wannabee’s IBM and Sun. For around a mere $37,000, plus the cost of a cartridge, I can backup 1TB of my most precious data. HP have also announced plans to extend the life of the DAT/DDS tape drive.
If you are a large enterprise customer then the cost of these drives may be justified (although I struggle to see how, when LTO4 drives can be had for about $5000 a piece) and I’m sure actual versus list price will be much lower.
The thing is, hard drives just continue to outpace tape growth. With 1.5TB drives on the way, and 1TB SATA drives available for less than $200, then disk-to-disk is much more appealing than tape at this rate. Obviously I’m riding roughshod over the issues of disk power consumption and portability but my point is that tape just isn’t keeping up the pace in either capacity or throughput.
The whole issue is especially true in the small business area where it is easy to purchase terabytes of primary storage but backup to tape is really time consuming.
Why can’t tape produce the equivalent bit density of disk? Is it the more fragile nature of the medium? Clearly tape is more flimsy than a rotating sheet of metal; the T10000 cartridge tape is 6.5 microns thick and the tape itself covers approximately 11.5 square metres, much more than the total surface area of the spinning plates in a hard drive.
I guess we will just have to accept tape capacity will never be good enough. That’s just the way it is.
By the way, Sun get a big fat zero in the RSS ratings for not providing their news in RSS feed format….