Articles about Data Backups
Basic Data Backups
There are basically three types of file backups. The types include, differential, incremental, and full. There have been some other options recently introduced by some software companies.
A full copy of all of your data is a full backup. Full backups are probably the best defense against data loss, but most companies use them only at certain times because they consume an extreme amount of time. Another drawback to a full backup is that it requires a lot of disks or tapes.
Incremental backups were developed to decrease the amount of time needed to perform a backup. An incremental backup will only backup any changes in data since your last backup. For example, if on Monday you did a full backup and you used incremental backups for the remainder of the week, the backup on Tuesday would only have any information that had changed since Monday. On Wednesday, the backup would only include any data changes made after Tuesday.
The main disadvantage to an incremental backup is that is can take a lot of time to restore them. If you needed to restore the backup you did Wednesday, you would need to restore your full backup from Monday first, then Tuesday’s files would have to be restored, and only then can you restore your data backed up on Wednesday. If there is any damage to your data files or any have been lost it will not be possible to restore files past that point.
Differential backups are similar to incremental backups by starting with a full backup and then you can backup only data that has changed since the full backup. The difference is these two types of backups is that the incremental backup only includes data that has changed since your last backup and the differential backup contains any data that has been changed since your last full backup.
For example, if you created a full backup on Monday, and did differential backups for the remainder of the week Wednesday’s backup would contain all the changed data since the full backup on Monday. It would not be necessary to have the other backup discs that were created in between these two times.
A differential backup is better than an incremental backup because it takes less time to restore your files. It only takes two disk sets for restoring the differential backups, but it may take many sets to restore incremental backups.
The best difference found in differential backups over incremental is shorter time to restore files. It never requires more than two tape sets to restore files from a differential backup. Incremental backups may require a great number of tape sets. However, over a period of time the amount of space needed for a differential backup will increase.
As you can see there are some major differences in these types of file backups. There are some places on the internet that will let you back your files up and store them on the internet. This might not be a wise option if your files contain sensitive data. It might be possible for a hacker to gain access to your data even though it is supposed to be safe.
The best thing to do is to consider all of these types of data backup to determine which one is best for you. You do not want to take a chance on being unable to retrieve any data that is needed for your business.
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