Hdd Capacity Calculation - Brickcom NR-2008 User Manual

10.5 HDD Capacity Calculation

Reference of HDD Capacity Calculation
The first time install NVR, please check if the HDD has installed.
The capacity of the HDD
There is no limitation of capacity of single HDD to NVR, please choose the HDD according to the saving time.
The choose of the Capacity
Computational formula of HDD Capacity:
Whole HDD Capacity = number of the channels × time in need (hour) × spent of HDD Capacity per hour (MB/hour)
Similarly we can have the formula of recording time:

（ ）
R ecording time hour
Note: 1GB=1000MB, not 1GiB=1024MiB, so HDD capacity shown in Base Configuration under HDD
Management less than real marked.
File size per hour (CBR).
Bit Rate
96k
128k
160k
192k
224k
256k
File size is more unpredictable when VBR style, please refer to the real size of recording file.
Diagram 10-3 WD Detection
TotalHDDCa
CapacityOc cupationpe rHour
Form 10-1 record file size
File Bit Rate
42M 320k
56M 384k
70M 448k
84M 512k
98M 640k
112M 768k
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（ ）
pacity MB

（ ）
MB/ hr AmountofCh
File Bit Rate
140M 896k
168M 1.00M
196M 1.25M
225M 1.50M
281M 1.75M
337M 2.00M
89
annel
File
393M
450M
562M
675M
787M
900M