Look, there’s 2 things here:
- NAS - meaning storage
and
- NAS - meaning a virtualisation / container server that’s doing lots of fairly random disk access
Which are you wanting?
For the first, just consider capacity (you’ll fill it) and noise (spinning away all night)
For the 2nd, really really consider SSDs as they’re silent and fast.
RAID1 is just a convenience factor, so whatever you do, don’t get too caught up in the drive mechanics as you’ll have a full backup (right?) and can restore your data at a moment’s notice.
Honestly, honestly, just go for something large & quiet and you’ll be fine.
And yes, SSD for the OS
I agree, the acronym NAS does indeed mean that.
But would you call a Hypervisor a NAS?
When I say NAS, I mean NAS. Bulk storage remotely accessible on the network.
When someone starts talking about all their VMs/Containers, I understand that to mean something else… I’d prefer to use a generic term like “server” instead.