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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
