Available Backup Types in Netbackup (Types of Backup)

1. Full Backup
Is the starting point of all the backups, contains all the data in the folders and files that are selected to be backed up. 

Advantages: Restore is fast
Disadvantages: Backup is slow and consumes more space.

2. Differential Incremental
Takes the backup of the files changed since the latest backup.  Archive bit is reset. Backup is taken based on the time stamp.


Advantages: Less space occupancy in the tape, since only the changes had been taken as backup. Backup window is shorter.
Disadvantages: Slow restore, (Restore window is longer) since the images are stored in scattered manner, while restoring, organizing the data will take time and restore. In case of retention, to restore all files requires last full backup and all the differential backups since last Full Backup, so all the differentials must be kept until the next full backup occurs.

3. Cumulative Incremental
A cumulative incremental backup is the backup of all files that have changed since the last full backup.

Advantages: Fast restore, since the last cumulative incremental is required for a complete restore (in addition to full). 
Disadvantages: More space occupancy in Tape/media. Backup window is longer

4. Synthetic Backup
A synthetic backup is a backup image created without using the client. Instead, a synthetic backup process creates a full or a cumulative incremental image by using only previously created backup images, called component images.

5. User initiated Backup 
Its also called manual backup, initiated by the user.

6. Archive 
After taking the backup the original file is deleted.

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