security cameras NVR SSD + HDD combo

[natsuu]

Hello,

 

I was wondering if its possible to use a mixture of an SSD and hard drive for a network video recorder for security camaras. Like for example I would want most recent footage up to a week stored on the SSD and then have that footage moved to the hard drive for longer term archival after a week has passed. How would you implement this if possible? I will just be using a VMS like blue iris on a pc I built. The reason I want to do this is incase I need to watch a clip of something that occurred and I want smooth and fast playback. Also I realized this would probably wear out the ssd a lot quicker, so I was planning on purchasing a small enterprise level ssd.

 

Thanks in advanced!

[Bombastinator]

The only possibility I can see (there are probably better ones) is by abusing raid 1.  Afaik it would require a  system where the video records only onto the SSD, then once a week the backup system does an image backup of the SSD contents onto the HDD, then wipes the SSD which is then used again.  There could be a period where the video recording would have to stop though, while the backup was made and the disk erased.  Which is what is what I assume you are trying to avoid.  
One might be able to do it with 3 SSDs and a hard drive.  Two SSDs are in raid 1 so there are effectively two copies of the video. One could take one off line, hot swap it with the third, leaving one SSD with the data on it that can then be backed up outside the system. Then after it is done and erased it hot swaps with the first disk, leaving one drive with a fractional amount of data on it and another completely empty.  It sounds like something that could possibly be automated, possibly with a shell script, thus avoiding the requirement of having removable bays and effectively doing a once-a-week sneakernet.  it strikes me as a potentially complicated thing and just has an air of Rube Goldberg about it.  Also it would wear the SSDs somewhat quickly though an old one could be replaced with a new one in this scenario.   Furthermore the raid 1 would not make things more robust as it usually does, rather the reverse.  I suspect there is already a product that does this much more elegantly created by someone with a more in depth knowledge of drives and possibly streaming than myself.  The simple simple solution if there is a fat pipe available is just run all the video to some service provider like Amazon and stream it into the cloud with no local drives at all.

Edited May 4, 2022 by Bombastinator

[natsuu]

6 hours ago, Bombastinator said:

The only possibility I can see (there are probably better ones) is by abusing raid 1.  Afaik it would require a  system where the video records only onto the SSD, then once a week the backup system does an image backup of the SSD contents onto the HDD, then wipes the SSD which is then used again.  There could be a period where the video recording would have to stop though, while the backup was made and the disk erased.  Which is what is what I assume you are trying to avoid.  
One might be able to do it with 3 SSDs and a hard drive.  Two SSDs are in raid 1 so there are effectively two copies of the video. One could take one off line, hot swap it with the third, leaving one SSD with the data on it that can then be backed up outside the system. Then after it is done and erased it hot swaps with the first disk, leaving one drive with a fractional amount of data on it and another completely empty.  It sounds like something that could possibly be automated, possibly with a shell script, thus avoiding the requirement of having removable bays and effectively doing a once-a-week sneakernet.  it strikes me as a potentially complicated thing and just has an air of Rube Goldberg about it.  Also it would wear the SSDs somewhat quickly though an old one could be replaced with a new one in this scenario.   Furthermore the raid 1 would not make things more robust as it usually does, rather the reverse.  I suspect there is already a product that does this much more elegantly created by someone with a more in depth knowledge of drives and possibly streaming than myself.  The simple simple solution if there is a fat pipe available is just run all the video to some service provider like Amazon and stream it into the cloud with no local drives at all.

Hmm I guess its not really feasible then. I wanted to keep the footage locally instead of storing else where, hence I switched from nest to some other POE cameras

[Bombastinator]

1 hour ago, natsuu said:

Hmm I guess its not really feasible then. I wanted to keep the footage locally instead of storing else where, hence I switched from nest to some other POE cameras

You could split the difference and have a SSD That backs up to the cloud.  You’d only have a week local. Drives usually can’t read and write at the same time but they can swap between read and write pretty fast.