data rot

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data rot

The slow deterioration of storage media until the data are no longer readable. Magnetic media are the most susceptible to data rot as their magnetic orientation deteriorates over time. Even solid state and optical media can decay over time. See bit rot and software rot.
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Meanwhile, tape is offline, inaccessible, and vulnerable to data decay.
AFC media is the first dramatic change in disk drive design made to avoid the high-density data decay due to the superparamagnetic effect," said Currie Munce, who holds the dual positions of director, Advanced Hard Disk Drive Technology at IBM's Storage Technology Division and director, Storage Systems and Technology at IBM's Almaden Research Center.
This self-tuning will automatically adjust probability calculations and reduce the level of data decay due to old contact information.