Desktop SSD or Enterprise in the server?

Question

RAID

Good day to all!
Assembling a server based on Supermicro X11DPH-T
Due to well- known reasons, deliveries of enterprise HDD/SSD to our region have stopped, and the price tags of those that remained in warehouses have skyrocketed.

Colleagues offer to assemble a basket of 8 pcs of ordinary desktop Samsung 860 PRO 1 TB and combine them into 10 RAID (the maximum that a mother can do without an additional controller)

The question is:
What is fraught with such a choice? What difficulties / pitfalls can I face?

Answer 1

What is the risk of such a choice?

problems. Perhaps big problems
. You just need to understand how SSD enterprise class differ from ordinary ones -

1. Processor - high-performance processors are installed in the enterprise, capable of simultaneously serving I / O and garbage collection. And in desktop ones, you can save money - put the processor simpler, it will do garbage collection when there is no I / O.
   
2. RAM - for the disk to work, you need RAM to store the cache, and data during garbage collection.
   
3. In a normal disk, you can save on it.
   
4. Cell reserve - in enterprise-class disks, the cell reserve is stupidly larger, and often reaches 40-50%. In ordinary, 4-7% is enough.
   
5. Enterprise-class disk firmware can work in arrays, unlike conventional ones.
   
6. Enterprise-class disk firmware is not fond of tricky caching schemes. Therefore, under a small load, the desktop disk will be faster than the enterprise, but under a long load, the enterprise will work without problems, and the desktop will be stupid
   

If you really need 10reid for some reason, I would not recommend putting Samsung 860 PRO there
. If you want to use Samsung 860 PRO in a server - why not. In many cases, it will work just as well, and sometimes even better, than an enterprise-class disk. Depends on the tasks that the server will perform.
And yet - I do not recommend doing anything other than a mirror on the built-in controller. If you need something cooler than a mirror - just buy a normal controller. If suddenly the thought arises that a normal controller is expensive, this means that you simply do not need a raid.

Answer 2

First, don't do a hardware raid. Otherwise, later, after the controller makes #HERAX, you will have to look for the same one.
Enterprise SSDs are different in that they have hardware protection for their cache from a sudden power outage, so they are equally fast with both enabled and disabled fsync.
A home SSD can show a blockage of performance and 1000% when working in parallel for synchronous writing.

Answer 3

The main difference is in the service life. If you need to constantly write databases and files to the SSD, then they are unlikely to live with you for a long time ...

Answer 4

The server one and without virtualization?
Used only during working hours, turned on at night, but users sleep at home?
Put PRO SSD for now without any raids. They'll last, I think, until autumn. And backups, of course, no one cancels.
And by that time, as Nasreddin said, either the donkey will die, or I will die, or, God forbid, the shah himself.