In survey after survey, data backup and recovery proves to be the No. 1 problem plaguing employees whose job it is to look after data storage. What is it about data backup plans that makes them so challenging? The good news is there are plenty of technologies to help you manage your backup burden, whether it's data deduplication, disk-based backup or continuous data protection (CDP). To help gain a better understanding of the backup process, it's important to know what these terms and technologies mean. Get started by taking our backup basics quiz, and if you haven't done as well as you've hoped, read one of our data backup tutorials.
DATA BACKUP PLAN BASICS QUIZ
1. In tape backup, this is the repeated back and forth motion a tape drive makes when there is interruption in the data stream.
2. This is a is a tape storage device that automatically loads tape cartridges using a robotic arm.
3. This is a type of backup where the backup copies all of the files that have changed since the last backup. The disadvantage of using this type of backup is that when performing a complete restore, the latest full and all subsequent backups must be restored, which can take a long time vs. other types of backups.
4. This is a complex tape backup plan that's useful for archiving data for an extended period of time in an economical manner. The strategy, which is based on a mathematical puzzle invented by the French mathematician Edouard Lucas, uses a cycle of exponential retention periods instead of a large number of tapes.
5. One of the hottest technologies in recent years, this is a method of reducing storage needs by eliminating redundant data. Only one unique instance of the data is actually retained on storage media, such as disk or tape. Redundant data is replaced with a pointer to the unique data copy.
6. This is a general term for backup and recovery products that take backup snapshots at set intervals. The term evolved from a need to differentiate those vendor products that take snapshots on a pre-determined schedule from ones that take snapshots whenever new data is written.
7. This is a collection of computer files that have been packaged together for backup, to transport to some other location, for saving away from the computer so that more hard disk storage can be made available, or for some other purpose.
8. This is a type of deduplication that can offer reduced bandwidth and storage usage. The disadvantage of using this type of deduplication is that it can be slower than target deduplication, especially for large (multiple terabyte) amounts of data. Because of the increased workload on servers, overall backup times may increase.
9. This is a backup strategy where a copy of your data is sent over a proprietary or public network to an off-site server. The server is usually hosted by a third-party service provider, who charges you a fee based on capacity, bandwidth or number of users.
10. This is the age of files that must be recovered from a backup for normal operations to resume if a computer, system, or network goes down as a result of a disaster. It is expressed backward in time (that is, into the past) from the instant at which the failure occurs, and can be specified in seconds, minutes, hours, or days. Hint: This often gets confused with recovery time objective (RTO).
This was first published in November 2010