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Storage is paramount.

You have probably considered CPU and RAM requirements, and perhaps disk space.
Have you considered disk performance, and disk reliability.
As CPUs get MUCH faster, its your hosting vendor’s disk performance that is most important.
Storage designed to work always

We start with RAID protection. We only use disk configured as RAID 10. This makes sure every data you write is stored on 2 disks, for protection.

Your Own Operating System. We use vmware for hosting your server. This allows you to run your own operating system. This keeps your data more secure than some other forms of virtualization.

Our SAN is SSD accelerated. SSD is the fastest form of data storage.
Its too expensive though for all your data.
We use SSD to store common accessed data for fast read access, which is up to 100 times faster.
We use a pair of mirrored (RAID) SSD to stage writes. Then the data is slowly written out to the real disks when there is free time.

What if the SSD wears out ?. For the read cache SSD, there is checksums on all the data, if the checksum match fails, we read directly from the real disks.
There is a minor performance hit, but no failure.
For the write SSDs, we again compare the checksum. If the checksum fails, we read the mirror device. If the SSDs fail too often, we can remove them from service, and write directly to the raw disk.
There is a minor performance hit, but no failure.

All content stored with checksums. Your data is stored with BOTH checksums and redundant storage.
So this checksum is additional to the normal RAID redundancy.
When reading the data, if the checksum fails, it reads the data from the redundant mirror copy.

If that fails, it returns an error to your application.
All other RAID storage, from other providers, would have returned the first read, that was wrong, and your application would accept the response. This is silent corruption occuring. You dont get silent corruption with our storage.