National Archives (UK) buys petabyte of digital storage

"The National Archives (UK) said the new one petabyte capacity - just over 1m gigabytes - is equivalent to 20m four-drawer filing cabinets. This will allow it to handle a "flood" of official digital records over the coming years. The National Archives said it chose a tape system, rather than a disk version, as it was greener. It estimated that a comparable disk based system would have used 25 times as much energy, as the disks use energy for spinning and cooling even when they are not reading or writing data"