In the future I want to develop a redundancy system so that I can copy service data and secrets on the hard drives, like that I can take advantage of the high speeds of solid state storage where the OS is installed while still retaining some redundancy (the strategy may change in the future). At the moment the OS is running on a random SATA SSD, but I plan to buy an NVMe to PCIe adapter and buy a 1 or 2TB NVMe SSD to put in there, saving up SATA ports for hard drives.