Symantec Backup Exec

Maximum number of backup sets per backup-to-disk file

Displays the maximum number of backup sets to be written to each backup-to-disk file in this folder. The maximum number can range from 1 to 8192. The default is 100.

Fewer backup sets in a backup-to-disk file may allow the overwrite protection period to expire sooner, and disk space to be reclaimed faster.

Maximum size for backup-to-disk files

Displays the maximum size for each backup-to-disk file contained in this folder. You can select either MB or GB as the unit of size. The file size can be from 1 MB to 4096 GB. The default is 4 GB.

If you create smaller but more numerous backup-to-disk files, performance may be slower. If large backup-to-disk files are created, file system limitations could cause memory allocation problems or network issues, especially if the backup-to-disk files are stored across a network.

This option works with the option Maximum number of backup sets per backup-to-disk file.

Allocate the maximum size when creating the backup-to-disk file

Creates the backup-to-disk file at the maximum size to reduce disk fragmentation.

You may want to increase the append period. However, increased append periods can cause an increase in the overall overwrite protection period since the overwrite protection period starts at the end of the last append job. This can result in fewer backup jobs being targeted to this backup-to-disk folder. To avoid this, set the maximum size for backup-to-disk files to an appropriate size.

When the backup-to-disk file is initially created at the maximum size, the backup job may be delayed while Backup Exec creates the file. The backup job remains in a running state until the backup-to-disk file is created and data can be written to it.

When you select this option, Backup Exec hides the option Maximum number of backup sets per backup-to-disk file. As a result, all of the space that is allocated to the backup-to-disk file is used.

This option is not available for removable backup-to-disk folders.

Allow x concurrent jobs for this backup-to-disk folder

Displays the number of concurrent operations that you want to allow to this folder. This number can range from 1 to 16.

This option is not available for removable backup-to-disk folders.

Low disk space threshold

Indicates if backup operations to the backup-to-disk folder are suspended when the amount of free space on the disk reaches a specific level.

When the disk’s free space reaches this threshold, Backup Exec places current jobs on hold until disk space is available. The low disk space threshold prevents disk-full errors and provides early warning. This threshold prevents jobs from being submitted to a backup-to-disk folder that does not have enough disk space to allow the job to complete. Backup Exec can instead submit the jobs to backup-to-disk folders that do have enough disk space.The backup-to-disk status displays Low Disk Space. You must free some disk space to allow job submission to resume.

Backup-to-disk default folder location

Displays the default path for new backup-to-disk folders.