Archive is calculated in one of two ways:

1. By time. Time period for which the video archive is stored is set and the calculation result is the disk space used for storing the archive.
2. By size. Disk space is set and the calculation result is the time period for which the video archive is stored.

Calculation by time

To calculate the disk space needed for storing the archive, set the following parameters on the Recording time given tab in the Archive calculation group:

1. Archive, days – the required archive depth (in days).
2. % Recording – the average percentage of hours a day during which there will be recording to the archive. 100% mean continuous recording.

Disk space data is for information only. The Vendor’s calculator is used for more accurate calculation. The list of known calculators can be found in the Vendor’s calculator dropdown list.

Calculation by size

To calculate time period for which the video archive is stored, set the following parameters in the Disk space given of the Archive calculation group:

1. Archive size – disk space used for storing the archive.
2. Units – units that measure the archive size. 

Information on the archive storage period is reference only.