Reference Guide

Backup Exec uses the sample data to estimate the rate at which future jobs will
use space in the disk array. Backup Exec computes the statistical average for
previous usage and determines any upward trends or downward trends. Backup
Exec also calculates the amount of used disk space that becomes available as the
overwrite protection periods expire for previous backup sets.
Backup Exec combines these estimates with the amount of available disk space
on storage arrays. Backup Exec can then predict how much time remains before
the disk space on all storage arrays is depleted.
The accuracy of the prediction is reduced if any of the following conditions occur:
■ The amount of history data is insufficient for a statistically valid estimate.
■ The history data shows substantial variance and lack of repeatability.
Backup Exec sends the alerts to notify you when these conditions occur.
See “Configuring an alert for low disk space on storage arrays” on page 46.
Configuring an alert for low disk space on storage
arrays
Backup Exec gathers disk usage information for all attached storage arrays.
Through statistical analysis, Backup Exec then estimates how much time remains
before the disk space on all storage arrays is depleted. You can also specify how
many days before low disk space occurs that you want Backup Exec to send an
alert.
See “About predicting disk usage in the Storage Provisioning Option” on page 45.
To configure an alert for low disk space on storage arrays
1
On the Tools menu, click Options.
2
In the Properties pane, under Settings, click Storage Provisioning Alert.
Predicting disk usage, setting thresholds, and configuring alerts using Backup Exec
Configuring an alert for low disk space on storage arrays
46