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Archive is calculated in one of two ways:

1. Bytime. Time period for which the video archive is stored is setand thecalculation 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.

Calculationby 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:

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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 dropdownlist.

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Calculationbysize

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

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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.