American Dynamics VideoEdge User Manual download pdf (Page 293)

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Appendix A: Storage

Overview

NVRs can require a tremendous amount of storage space depending on the number of cameras,

codec, resolution, frame rates, recording modes, and the duration for which you want to preserve

video recordings. At the outset of your use of the NVR system, you will need to have storage

configured to record media data captured by video devices (cameras or encoders) connected to

your NVRs. From time to time, you may find it necessary to replace or add a storage device to

produce a greater capacity for video storage.

This section provides instruction

s for connecting external storage devices and using them with the

NVR. It is assumed that the storage device’s Disk Groups (RAID set) and Virtual Disks (LUNs)

have been properly configured and the device has been physically connected to the NVR. Use the

operating system to mount any local storage device or any network storage device to the NVR.

Storage Concepts

iSCSI

• This standard is used to transmit data over local area networks (LANs), wide area networks

(WANs) and can enable location-independent data storage and retrieval.

• A system that uses iSCSI requires an initiator

. Initiators are iSCSI clients and they can either be

in software or hardware.

• iSCSI does not require dedicated cabling; it can use existin

g switching and IP equipment. As a

result, iSCSI is thought to be a low-cost alternative to Fiber Channel, which requires dedicated

infrastructure.

Fiber Channel

• Fiber Channel, or FC, is a gigabit-speed network technology primarily used for storage

networking. It got its start in the supercomputer field, but has become the standard connection

type for storage area networks (SAN) in enterprise storage.

• Fiber Channel Host Bus Adapters (HBAs) are availab

le for all major open systems, computer

architectures, and buses, for example, PCI. They are needed to connect a Fiber storage device

to a server.

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American Dynamics VideoEdge User Manual Page 293