Each data sample requires eight bytes of storage. This alters the equation to:
|Bytes necessary for each trend||= 704 x No. Files + 160 +||File Period (secs) x (No. Files) x 8|
|Sample Period (secs)|
The number of bytes necessary then becomes:
|Bytes necessary = 704 x 5 + 160 +||(7 x 24 x 60 x 60) x 5 x 8|
|Bytes necessary = 2,422,976 bytes|
Note: The calculations above do not take into account the space necessary to store the history file for each trend. This is because these files remain at a set size and therefore do not significantly impact the amount of disk space necessary.
Note: For efficient trends storage, use Windows file compression. By using this method you often can reduce your files to 10% of their original size; the actual amount of compression varies depending on the rate of change of the data.