146
Example Operating Conditions
The figures in the above table are an indication only. The frame sizes will
vary according to the scene captured by the camera, and thus the required
hard disk capacity will vary. Please be sure to confirm under the actual
installation conditions before starting operations.
Note
Example of Hard Disk Capacity (6 units of VB-C50i, 1fps, retention period of 30 days)
Resolution Quality Frame Size (KB) Required HDD Capacity (GB)
320x240
640x480
30
50
80
30
50
80
11.1
15.1
25.4
36.4
49.2
85.5
164.6
224.0
376.7
539.9
729.7
1268.1
Captured with NTSC model.
Disk Space Management
The following are specific and operative examples describing how the Storage Server
manages its disk space.
Example: Storage Server has two disk drives; C and D. Specify [Maximum disk space used]
(tP. 23) as tabled below. 19 camera servers are used for recording per drive. It is assumed
that [Low disk space notification threshold] (tP. 23) is specified as 10%.
Disk Drive Disk Capacity Free Disk Space Max. Disk Space Used Camera Server No.
C Drive 100GB 50GB 40GB 19 units
D Drive 200GB 200GB 200GB 19 units
The Storage Server manages its disk space according to the following rules:
Low Disk Warning Level
When case 1 or 2 below is satisfied, the Storage Server generates event notification.
1) When the Storage Server disk space used exceeds the following value:
[Setting value of Maximum disk space used] * (100 - [Low disk space notification
threshold]) /100
For example, if the [Low disk space notification threshold] is set to 10%, event
notification is generated at the time when the free disk space is reduced to 10% or
below of the setting value of Maximum disk space used.
2) When free disk space falls below the following value:
[Disk capacity] * [Low disk space notification threshold] /100
If the Storage Server is the only application running on the disk, observe case 1.
If other applications may write to the same Storage Server disk, observe case 2.
Even if the Storage Server uses only a small amount of disk space, event notification may
be generated according to case 2 when other applications use the free disk space.