![SAW Gallery, Ottawa](https://www.sindark.com/wp/wp-content/uploads/2007/08/img_0328.thumbnail.jpg)
This evening, I was at an art gallery watching 8mm, Super 8, and 16mm films shot 25-40 years ago. Most of them were not in pristine quality, but still quite viewable. Afterwards, I got into a conversation with someone who works in archival film storage for the federal government. Contemporary society is generating far more data than ever before. At the same time, virtually nothing is stored at archival quality. An 8mm video or a 35mm negative will be fine in forty years if stored at controlled temperature and humidity. Even dumped in a box in someone’s attic, it is still likely to be comprehensible. The same is not true for how we store data today.
Basically, you have optical and magnetic storage. Optical includes CDs and DVDs, and is further divided between mass releases CDs (which are pressed into metal) and personally made CDs (which rely on dyes exposed to lasers). Neither is really archival. It is quite possible that your store-bought DVD will not work in twenty years. It is quite likely that your home-burned DVD will not work in five.
In terms of magnetic storage, you have tapes and hard drives. Many companies have learned to their detriment that poorly stored magnetic backup tapes can be useless. As for hard drives, they are vulnerable to physical breakdown, viruses, exposure to magnetic fields, corrosion, and other factors.
While is is likely that the products of my early fumblings with Ilford Delta 400 in high school will be intelligible in forty years, it is a lot less likely that my digital photos from Paris will be. That’s ironic, of course, given that the first ones can only be copied imperfectly and at a notable expense, while the latter can be copied perfectly for a few cents a gigabyte.
While some information exists in the form of so many copies that is will likely never be lost (ten thousand unsold copies of Waterworld on laserdisc), there is reason to fear that personal data being stored in the present era will likely be lost before people born today have grandchildren. While that has certainly been the norm for generations past – who would be lucky to have their lives recorded as a birth in a parish register, a marriage, and a death – it seems rather a shame given how cheap and ubiquitous data creation and storage has become.
[Update: 11 August 2010] I forgot to mention it earlier, but one potentially robust way to back up digital files is to print them on paper.