Yes, the concern is the quality of the drive and the drive controller.
The drive controller is everything when it comes to SSD longevity. It managed the flash cells to “rotate” data is order to minimise wear.
I am aware that price is an issue it but look for a known brand
The RPI has to connect via USB. There is no SATA controller.
The type of SSD doesn’t really matter much. You can even use NFS.
I’d be more afraid of running OH and Grafana on the same RPi. I’d use a second one.
And be aware that there’s currently a number of problems with Grafana/PhantomJS. Search the forum for more info.
The speed doesn’t matter much. You are limited by the speed of USB bus, which is slower than any drive. So a m.2 drive will not give any better performance, and using a m.2 drive to achieve better speed performance won’t work.
Does graphana consume so much resources?
I just want to display temperature and humidity of three sensors. Somebody on the board told me to use influxdb and graphana.
What is a good alternative to graphana and a second Rpi?
yes - MapDB and for some items RRD. But the main persistence is a MariaDB on my NAS.
nope. I do backup regularly (only config, still trying to figure Amanda out!)=
I don’t know…
hmm… I’m not sure, I think I read sometime ago, that for spinup the HD needs a bit more power, but in “real life” it wouldn’t make much difference?
My HD-housing came with an Y-cable so I have a seperate USB-Port just for power (I could also use some PIN with 5V power. But I already use a powered USB-Hub which works fine.