Storage Media - Vivotek IP Surveillance Overview

Chap.6 Bandwidth and Storage
Figure 6.1 will demonstrate the calculation of storage space required for one-day continuous recording with an
assumed transfer rate of 400kbps. Note that 1 byte equals 8 bits and 400Kb totals 50KB (b refers to bit and B
refers to Byte).
In the case of recording for 30 consecutive days, 8 hours per day, you should prepare at least 43.2GB (Figure 6.1).
Figure 6.1 Calculation of storage space required for 30-day recording (400Kb)

6.2.2 Storage Media

Various types of storage media have been developed to meet different demands and purposes, such as
● Internal buffer
● External memory cards
● DAS (Direct Attached Storage)
● NAS (Network Attached Storage)
● SAN (Storage Area Network)
Internal Buffer
A network camera is equipped with an embedded flash memory or DRAM as a buffer zone that enables temporary
storage of pre- and post-event video images. Images are stored in the buffer zone for a short period of time before
being transmitted to the back-end recording platform.
External Memory
CF, SD and SDHC cards are three main external memory types. They are designed for pre- and post-event storage
and data portability. Many of VIVOTEK products are furnished with a SD/SDHC card slot for on-board storage.
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1 second
Store 3,600 seconds data in 1 hour
Store 8 hours data in 1 day
Store 30 days in 1 month
400Kb = 50KB
50KB x 3,600 = 180MB
180MB x 8 = 1.44GB
1.44GB x 30 = 43.2GB