People relying on reliable backups building their own storage servers from scratch. Clearly this is universal sage advice that will certainly not end badly for the vast majority of people -_-.
I'm on my second Synology, the first was a cheapish 4-bay; now I'm using a much pricier 8-bay. This is for personal use, but the time and effort saved by using this over hand building has saved me factors more money. I do recommend NFS over SMB for the cheaper models as smbd is a lot more CPU heavy and transfers actually became CPU bound pretty quickly. I've never had data corruption issues in my 10ish years of use, but one subjective data point is pretty crap.
I don't imagine that there are many personal users who need/want ISCSI or other more raw block I/O protocols. As for businesses, off the shelf solutions in your requirements range are often available, and unless you're looking for very specific optimized workloads, there's probably a bit excessively expensive vendor solution that can meet those requirements.
I'm on my second Synology, the first was a cheapish 4-bay; now I'm using a much pricier 8-bay. This is for personal use, but the time and effort saved by using this over hand building has saved me factors more money. I do recommend NFS over SMB for the cheaper models as smbd is a lot more CPU heavy and transfers actually became CPU bound pretty quickly. I've never had data corruption issues in my 10ish years of use, but one subjective data point is pretty crap.
I don't imagine that there are many personal users who need/want ISCSI or other more raw block I/O protocols. As for businesses, off the shelf solutions in your requirements range are often available, and unless you're looking for very specific optimized workloads, there's probably a bit excessively expensive vendor solution that can meet those requirements.