Appendix 1 HDD Capability Calculate
1. Required HDD capacity for one channel one hour (
unit Mbyte)
:
HDD capacity
＝
bit rate / 8 × 3600 / 1024
The unit of bit rate is
Kbit/s.
2.Required one channel HDD capacity (
unit Mbyte)
:
HDD capacity
＝
required HDD capacity of one channel for one hour× daily recording time
× number of recording days
3. Required HDD capacity for all channels timing record (
unit Mbyte)
:
HDD capacity
＝
required one channel HDD capacity × the number of channels
4. Required HDD capacity for all channel alarm records (
unit Mbyte)
:
HDD capacity=required one channel HDD capacity × the number of channels ×Alarm
rate