American Dynamics VideoEdge User Manual download pdf (Page 296)

Appendix A: Storage

280 VideoEdge NVR 4.4 Installation and User Manual

Storage Strategy

In order to properly configure an NVR, it is important to understand how much storage you will

require and how to configure it to maximize the overall performance.

To configure storage on an NVR you must consider:

1 S

torage

• The type of storage to be used (Internal HDDs, iSCSI external storage, Fiber

Optic exter

nal storage, USB external hard drives, etc).

• The storage configuration (RAID 0, RAID1, RAID 5,

RAID 6, JBOD, etc).

2 Came

ras

• Total number of cameras.

• Type of cameras (make/model, resolution, codec,

FPS, compression, recording

mode).

• The file size of the camera’s video stream that is to be recorded.

3 Th

e required recording retention period for stored video.

Below details some different storage usage examples and are compared to the NVR 4.1 storage

del:

• Example 1: Using a 20TB RAID set

NVR 4.1: 20

TB RAID set is divided into 10 2TB logical volumes. There are 10 storage devices

seen on the NVR.

NVR 4.2+:

20TB RAID set can be added as 1 20TB volume. The NVR will recognize this as 1

storage device that can be used for storage. Alternatively you can create 10 2TB logical

partitions. The NVR will recognize this as 10 storage devices that can be used for storage.

NVR 4.2.1+ (Migrated from 4.1): 20

TB RAID set is still divided into 10 2TB logical volumes.

Each 2TB volume is represented as 14 storage devices. The NVR will recognize this as 140

storage devices that can be used for storage.

• Example 2: Configuration Set up

NVR 4.1: S

torage configuration is performed using the NVR Administration Interface.

NVR 4.2+: S

torage configuration is performed using Linux YaST/Partitioner.

If you want to use the XFS file system for maxim

um throughput, additional file system options

need to be configured. For Internal devices, you need to configure;

rw,noatime,nodiratime,attr2,nobarrier,noquota,allocsize=4m,inode64. For external

devices,

includingiSCSIandFiberOptic,youneedtoc onfigure;

nofail,rw,noatime,nodiratime,attr2,nobarrier,noquota,allocsize=4m,inode64.

Note

nobarrier should only be used on storage devices connected to disk controllers with battery

backed cache.

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