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2. Continuous data protection - Wikipedia

   en.wikipedia.org/wiki/Continuous_data_protection

   In some situations, continuous data protection requires less space on backup media (usually disk) than traditional backup. Most continuous data protection solutions save byte or block-level differences rather than file-level differences. This means that if one byte of a 100 GB file is modified, only the changed byte or block is backed up.

3. Optical media preservation - Wikipedia

   en.wikipedia.org/wiki/Optical_Media_Preservation

   The preservation of optical media is essential because it is a resource in libraries, and stores audio, video, and computer data. While optical discs are generally more reliable and durable than older media types, (magnetic tape, LPs and other records) environmental conditions and/or poor handling can result in lost information.

4. Comparison of popular optical data-storage systems - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_popular...

   The following are examples of optical storage media excluded from this article: Holographic data storage - either still in development, or available but generally only encountered in niche usage as of 2007. Laserdisc - not used for recordable data storage in the computing world, although recordable formats did exist briefly.

5. Comparison of online backup services - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_online...

   ^15 Hybrid Online Backup works by storing data to local disk so that the backup can be captured at high speed, and then either the backup software or a D2D2C (Disk to Disk to Cloud) appliance encrypts and transmits data to a service provider. Recent backups are retained locally, to speed data recovery operations.

6. Backup - Wikipedia

   en.wikipedia.org/wiki/Backup

   The backup data needs to be stored, requiring a backup rotation scheme, [4] which is a system of backing up data to computer media that limits the number of backups of different dates retained separately, by appropriate re-use of the data storage media by overwriting of backups no longer needed. The scheme determines how and when each piece of ...

7. Magneto-optical drive - Wikipedia

   en.wikipedia.org/wiki/Magneto-optical_drive

   A magneto-optical drive is a kind of optical disc drive capable of writing and rewriting data upon a magneto-optical disc. 130 mm (5.25 in) and 90 mm (3.5 in) discs are the most common sizes. In 1983, just a year after the introduction of the compact disc , Kees Schouhamer Immink and Joseph Braat presented the first experiments with erasable ...