You can specify the following types of backup in the Advanced page of the Backup Wizard:
Backs up only those blocks that have changed since the last successful backup. The advantages of Incremental Backup are that it is a fast backup and it produces a small backup image. Arcserve Unified Data Protection Agent for Linux uses a driver to monitor the changed blocks in the source node since the last successful backup.
The available options are Repeat and Never. If you select the Repeat option, you must also specify the elapsed time period (in minutes, hours, or days) between backup attempts.
Minimum: 15 minutes
Default: 1 day
Backs up the entire source node. Depending on the volume size of the backup node, Full Backup produces a large backup image and usually takes a longer time to complete. The available options are Repeat and Never.
If you select the Repeat option, you must also specify the elapsed time period (in minutes, hours, or days) between backup attempts.
Minimum: 1 day
Default: Never (no scheduled repeat)
Verifies that the protected data is valid and complete by performing a confidence check of the stored backup image to the original backup source. If necessary, the image is resynchronized. A Verify Backup looks at the most recent backup of each individual block and compares the content and information to the source. This comparison verifies that the latest backed up blocks represent the corresponding information at the source. If the backup image for any block does not match the source (possibly because of changes in the system since the last backup), Arcserve Unified Data Protection Agent for Linux refreshes (resynchronizes) the backup of the block that does not match. You can also use a Verify Backup (very infrequently) to get the guarantee of full backup without using the space required for a full backup.
Advantages: Produces a small backup image when compared to full backup because only the changed blocks (blocks that do not match the last backup) are backed up.
Disadvantages: Backup time is long because all source blocks are compared with the blocks of the last backup.
The available options are Repeat and Never. If you select the Repeat option, you must also specify the elapsed time period (in minutes, hours, or days) between backup attempts.
Minimum: 1 day
Default: Never (no scheduled repeat)
The type of backup that runs depends on the following situations:
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