Well, the TLDR is that the market is already moving that direction. SSDs are much more reliable (especially for mostly read ops), takes up less volume and are quiet. Speed doesn’t really matter in NAS yet and while HDDs still have the capacity crown for now, they only make sense in a SOHO NAS that requires large (50TB+) storage capacity now. Big ops prefer SSD infrastructure for the space and power savings, and if you only need a few TB, there is no reason not to go for SSDs today.
The long read: The market is ditching HDDs. There is a reason you are starting to see flash sales of 8TB HDDs and below, HDD shelfs, and other HDD infrastructure.
In the server room, HDDs have pretty much no market left. There are companies that still utilize HDD infrastructure, but almost all rack ops are switching over to SSD. Why? Because you can now populate 1 rack with what used to require 7 racks. And that is before you even begin to consider faster infrastructure. So, how would you like it if I told you you could cut 85% of your real estate costs and 85% of your power costs?
For SOHO, there really is nothing left to hoard. Yes, you have surveillance videos, you have blue ray rips, and so on. All of this video can easily fit on 100 TB of storage since 100TB can store 3000 or so Bluerays easily. Unless your name is Linus Sebastian and your homegrown company edit hundreds of videos each month, you will not reach these capacities. Smaller channels like Jays2Cents does just fine with something like 40 TB of storage.
So, for the same price now, you can buy an 8TB or 10TB HDD, or a 4TB SSD. Soon a 4TB SSD will be at the same price parity as a 6TB HDD, and an 8TB SSD will be the same as a 12TB HDD.
Then, let us have a look at capacity and speed. HDDs are fundamentally limited by SATA and their RPM. HDDs cannot reach faster than ~300MB/s throughput while a PCIe 5.0 drive can easily reach 10x that, if not 20x. As for capacity, there are new, expensive drives coming out with this newfangled HAMR / MAMR technology. Only problem is, new tech is expensive. HAMR drives will cost twice as much as CMR drives, which brings the drives to a per-TB price parity with… Yes… SSDs. What brings the cost of new tech down? Sales. If HAMR drives cannot compete with SSD on price there is no point.
Without HAMR, HDDs cannot reach above 24TB without great difficulty. SSDs are talking about 256TB and beyond, coming out next year. Samsung has stated they hope to be first to the market with the first 1PB (1000TB) drive, and they have a pretty good shot at it.
So, SSDs are now more reliable than HDDs (in fact, so reliable you almost don’t need redundancy for uptime reasons; you still want it for preventing data corruption). They are faster. They have more capacity. And costs? Well, it is probably inevitable that costs will come crashing down eventually, too.
So, from my perspective full SSD storage is now as inevitable as the shift from IDE to SATA was inevitable.
Now, here is what I do not know; will SSD form factors stay the same? I think it is obvious that we will have m.2 and 2.5" on consumer for a while longer. Most consumer PCs today are ditching SATA in favor of m.2 slots anyway, but there are other ways to hook a drive up, like u.2 for instance.
I do not know if there will ever be 64 TB m.2 SSDs, I think it is more likely than not, like a 60-70% certainty, but it is possible a new form factor will be required for high capacity SSDs. I think it is very likely 32TB m.2 will exist, and maybe they can squeeze in 64TB on a stick like that. Beyond 64TB, however, most probably requires a new type of transistor.
So, let’s assume Flashstor max capacity is 32TB per drive, that is 160TB of redundant storage. Far more than what a 4Bay HDD NAS is likely to ever give you (~72TB of redundant storage, if you are lucky). I see no reason why you should wait for HDDs to die off when you can invest in m.2 infrastructure today. That is just me though, and I could very well be a bigger delusional fool than the flat earthers
Yes, there is, but do remember they are best left alone. All of the prebuilts come with their own “firmware” OS. Reflashing them just because things should be open is one of the dumbest things you can do, from a functionality standpoint; it will break some features. If you want things to just work, don’t do it. If you love tinkering though, foot, meet gun. Fire away!