The choice of an ideal video storage option presents a challenge for many homeowners and businesses that are intending to deploy CCTV security cameras. Fortunately, there are various storage options to cater for the needs of both individuals and businesses.
What to consider when selecting the type of video storage
The purpose of CCTV surveillance systems is to record and store video footage. Users have the option to view surveillance video in real time, or retrieve and review the recorded video. The video must be stored for a specified duration, ranging from a few days to years, depending on the needs of the property owner.
The Different Types of CCTV Storage
1. Internal Storage
Surveillance video can be stored in inbuilt hard drives contained in PCs, Servers, DVRs, and NVRs. This is most common approach for individuals, as well as small business applications, owing to its low cost. The storage capacity for these hard drives ranges between 2TB to 8TB. However, internal HDD storage is less scalable and thus, not suitable for demanding security applications that require massive storage capacity and prolonged storage durations.
2. Directly Attached Storage
The limited scalability of internal hard drives may require users to find an inexpensive way to extend the storage capacity of their servers, DVRs or NVRs. Directly attached storage refers to the use of external hard drives, which are "directly" connected to the server, DVR or NVR, via eSATA, USB, or other means, except the IP network.
3. Networked Storage
Commercial security applications that deploy a large number of CCTV security cameras require massive storage capacity. Internal hard drives and directly attached storage are limited in capacity and thus, unsuitable for such operations. Networked storage, which refers to massive IP based storage clusters or "˜pools' such as SAN and NAS, are capable of storing massive amounts of video from hundreds of surveillance cameras. This type of storage is quite complex and costly, but offers efficiency, flexibility, and scalability.
4. Embedded Storage
Covert CCTV cameras support embedding of storage medium such as SD cards. The small size of the cameras used for covert applications cannot allow hard drives to be installed.