I'm considering buying a new desktop computer. With both an SSD (probably a 1Tbyte model, such as Sandisk Extreme Pro M.2 NVMe 3D SSD - 1Tbyte) and some rotating hard disk.
My desktop computer at home stays powered on 24h/24 and run some Linux distro (usually Debian/Sid). I am even sometimes remotely accessing it from office. To summarize my activities, I am mostly running intensively compiler-like software.
Sometimes, I do have a program (perhaps my bismon in a few months) which runs (conceptually) for a long time (maybe weeks of cumulated CPU time). In practice, of course I am checkpointing and restarting it (but that is an implementation detail).
I will buy some (rotating) hard disk, which will be powered on 24h/24.
What kind of hard disk is more robust for such a purpose (I don't expect intensive disk accesses - since my applications are more CPU intensive than disk intensive and run on the SSD -, but I do expect them to happen once in a while regularly, and I want my disk to last 5 years, not just one.)
Some disks are branded as NAS disks (e.g. my favorite French shop has a NAS disk topic). Is it just a commercial brand, or does it means that such disks are more reliable?
When is it worth to put a "NAS disk" inside a desktop (powered 24/24)?
The NAS disk will mostly be used for backup purposes (e.g. a
crontab job running every hour to backup a file tree from the SSD to the disk), and for files, such as downloaded ones, which are not often accessed; the main working disk -containing source code, object files, executables, and active data files- would be an SSD; That NAS disk would also have a swap partition, which in practice will never be used, because my future desktop would have a lot of RAM, at least 64Gbytes, and my programs usually won't use all of it.
Or should I ignore the "NAS" qualification and choose simply my disk on reliability (MTBF published by the disk maker) criteria? But of course I want a 7200RPM one.
More generally, what buying criteria should I have for a hard disk (of several terabytes, probably 4 to 8) which should last 5 years, in an always powered on desktop (well cooled).
PS. That disk won't be extremely active, like e.g. the disk of some RDBMS server would be.