I want to setup a file server and a backup server in another building for our workplace (for clarification: I am talking about two systems, the file server in one building and the backup server in another). We decided we need at least 10 TB storage space. The plan was to buy two 4-slot NAS. Let's say I use RAID5 for the file server and buy 4x 4TB HDDs I would get effectively 12TB of storage, right?
Here is my question: Should I use RAID5 for the file server? It seems the most effective storage-wise, while RAID1 seems safer but I'd have to sacrifice half of the storage. Next question: What HDD sizes and which RAID would be best for the backup?
I already saw this thread, but it is already 6 years old and HDD sizes have changed drastically with 10TB being available. The comments suggested RAID10, is that the best approach nowadays? How are storage and parity divided in RAID10?
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