[email protected] wrote:
We have 6 external 4TB drives on a Win7 computer that has 24gb memory. No problem at all. Of course this creates 6 separate drives - not sure about the NAS you are looking at. We find they run as fast as the internal drive, at least for what we do - primary a backup for all the computers on our network and 4 cloud servers. We got the drives at Costco for about $149.95 each. If you don't have 6 USB3 ports you can use USB2 or get an expansion port device. For backing up, we don't see a difference in USB2 vs USB3.

Thanks Kam!
I don't have the inside-the-box tech specs, but my guess is that these video cameras open a file and write to it continuously until it reaches a certain size, then they start writing over the beginning of the file in a loop. As long as the starting point byte offset is kept track of, you'd be able to climb in your "way back" machine and watch video from whatever camera starting 30 days ago (which is my client's goal.) So, I'm thinking they'll want one large image, via RAID array.

What makes this dicey is that they want to do this with 18 high-definition video streams. They're using a fairly aggressive compression algorithm, but thirty days of 24x7 video stream x 18 cameras is still a lot of data!

Anyway, I put the entire system on its own subnet, both logically and hardware, so I don't really care what they do with their electricity. The company owner wants to be able to use it to deal with problems of theft and employee malfeasance...although in past situations the video capture has provided zilch benefit. (He had streaming video of an employee carrying 5 60" TVs out of the warehouse after hours, and the employee, although terminated, was able to win back pay for the time between her termination and the trial date, and never paid a penny of restitution. They even found the pawn shop the TVs were sold to and got most of the TVs back, albeit damaged pretty bad. Ended up costing him $50k in lawyer fees and other expenses, while the employee just moved to another state and even used my client for a reference.)

Mike C

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