Comments on http://www.madore.org/~david/misc/orders_mag.html

jonas (2018-09-18T15:49:48Z)

> This means that the content of a very large library is measured in terabytes: this is more than hard disks contain (I do not think any single hard disk exists yet that has a capacity above a terabyte).

Since you wrote that entry, the capacity of hard drives has increased much faster than the capacity of libraries. There are now hard drives of capacity 10 TB of physical size comparable to the size hard drives had when you wrote this, hard drives of capacity 3 TB with the smallest of the four sizes commonly used for laptop hard drives, solid-state drives of capacity 2 TB and the physical size as some ordinary hard drives, and removable solid-state disks of capacity 128 MB and physical size 15 mm × 11 mm × 1.0 mm for which many people have a read-write drive at home, all of these available on the consumer market. Admittedly the largest capacities I mentioned are currently quite expensive.

On the other hand, libraries have many books that contain not only text, but also high quality images, and I expect they increase the total capacity of a library. Also, some libraries also have archives on media other than books, such as microfilm or digital documents on hard disks.


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