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Facebook puts 10,000 Blu-ray discs in low-power storage system (pcworld.com)
12 points by patangay 4518 days ago
1 comments

"The Blu-ray system reduces costs by 50 percent and energy use by 80 percent compared with its current cold-storage system, which uses hard disk drives.."

Not bad. Anyone know how it would compare to tape?

Tape is still cheaper per Gb. Google uses StorageTek SL8500 and Spectralogic T-Finity libraries to manage it's backups and cost is significantly smaller then trying to do that with spindles.