I realize that RAID itself isn't backup software, but I would like to implement a RAID5 or RAID10 configuration for performance and redundancy. In my computer I'm using an M.2 PCIe SSD for my OS, my software is installed on 2 Samsung 256GB 840 Pros setup in RAID0, and all my data is stored on a 2TB and a 1TB drives. In my NAS(correct me if I'm wrong, I was thinking about either a RAID5 or RAID10 configuration for increased performance and mirroring. Having had a NAS drive go out in the past, it would be good to know that my data is mirrored with another drive so if a drive does die on me, all I need to do is swap the dead drive for a new drive and all the data would automatically be put back on it since I'd still have a drive running with all my info on it. I recently got rid of my company's server, which housed all the information we're required to keep on file, and I had the SQL Server data file backed up locally to a NAS and every night, it would update the data file which was kept offsite, in 2 different places. Now everything, including all the software, is outsourced and backups of my corporate data is done twice daily. I don't need that kind of disaster and recovery plan, I just want to be able to backup my personal info, have more than one drive hosting the data, and I also want to be able to stream data from it to other devices, like a media server. It would be nice if multiple devices can also backup personal data, locally and remotely, and stream data, locally and remotely.
I'm tired of having a single NAS (like a Seagate GoFlex or a WD MyCloud) and want to get something with more storage, is upgradable, has more functionality, and is very fast. Over the last year it seems like enterprise NAS devices are starting to enter the consumer market, but when that happens, you start seeing marketing hype for features that actually provide no benefit making it more difficult to buy a solid device with all the functionality you want.
Why would RAID5 and/or RAID10 not be suitable for backup purposes if I just need something to store image files of my PCs, or hold my backup files, but also want to store data to it that multiple devices can access, locally and remotely, and stream anything from a song to a 4K video? I don't need my data to be as secure as my company data, I just want to be able to backup data from approximately 8 devices, have the data mirrored in case of hardware failure, and be able to stream 4K videos with no buffering. I've been looking at the QNAP, the Synology, and also the Drobo.