But I think in Veracity Coldstore,the whole cost/reliability point in missed due to lack of redundancy.And raid 1 is the only redundancy option which again gets very expensive.Any other suggestions.
For example, we have installed netgear readynas 4200 with 12 wd greens(2tb) installed.35* 2 mp cameras recording at 15fps without any errors or failures for past 20 months.Software used is Aimetis Symphony and configured iscsi.This was a cheap storage solution which worked well also.
I am asking for similar combinations which worked well.
That being said I have had bitter experiences also, where we installed 12*3tb seagate sv35 hdds in netgear readynas 4200 v2,and had drives failing like crazy after six months.So please share the bad ones also.
Undisclosed, did you test the failed drives? I've found that if the RAID controller is not tuned specifically for video surveillance recording, it will kick out perfectly good drives.
Agreed. Be careful tuning and pairing up RAID controllers and drives that are being stressed 24/7
This is a very interesting conversation and I am surprised it has not come up sooner. As we continue to move from a CCTV world, where BTW DVR's failed also, IP video surveillance environment requires that the integrator, and VMS manufacturer are familiar with how a data center entrainment works. We have moved from a plug and play solution to a multi-Server environment (processing and storage), to understanding network bottlenecks, heating, cooling and power demands as well.
When discussing the correct disks for a solution, one needs to also consider the type of RAID being used as well; software vs. hardware. Sure, hardware RAID is more expensive than Software RAID which is fairly newer technology but you have to consider what you get for the extra $$. For Example, Software RAID is known to impact performance on the host computer, because it needs to process and determine where data goes before it is written to DISK. This can also cause data to be corrupted or especially if the incorrect (or older) driver is being used. Relying intensively on software RAID can cause video data files to be delayed from being written correctly, ultimately failing a drive at times.
Remember DISKS are nothing more than JBODS, Software or hardware w/specific software capabilities is what determine how well a DISK performs and/or is written to - especially for Video.