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Trying to figure out how to drop my energy requirements and still keep ~100TB running.
Right now it’s 12x 10TB drives in a RAID 6 with ~8TB still available; it might be time to bite the bullet and upgrade to 20TB drives. Problem is, if my calculations are correct, I’d still need 7 drives - 5 X 20TB=100TB and then two more drives for “parity”.
The server I have lined up already has a PERC in it.
Do you actually need 100TB instantly available? Could a portion of that be cold storage that can be booted quickly from a WOL packet from the always-on machine when needed? With some tweaking, you could probably set up an alpine-based NAS to boot in <10 seconds, especially if you picked something that supported coreboot and could avoid that long bios post time.
Don’t need the 100TB instantly. Most of the Linux ISOs are more for archival reasons.
Talk to me more about this NAS with WOL. :-)
Most motherboards support wake packets sent over Ethernet. They only work on your lan, but they will start a machine or wake it from sleep. Sending a packet from another machine is fairly simple, it’s old tech. I’ve seen simple web servers that have a “send wake” button, but you could probably trigger it from a variety of things
The WoL part I’ve got.
It’s the NAS with ~10 second boot time that can house enough drives for 80TB of data which would be triggered and accessible to a plex server when needed that I’m more interested in.
Alpine Linux can boot in a few seconds. Stick to something extremely simple like nfs or samba and nothing else in the boot. Or use suspend to ram with your regular OS.
Last question; how would I get it to wake when someone’s trying to access a file on it?
You would have to script something based on whatever service is actually being used, or maybe node red? In the past, way back, I used something like this that is just a simple web page that the user has to click a button to start the machine - there are a bunch of these https://github.com/Trugamr/wol - the web server is on the lan with the NAS so can send the magic packet, but the page can obviously be served over the internet.
So, realistically, I’m probably looking for a commercial NAS that’ll spin the drives down when nothing is accessing them and spin them up once something attempts access.
Because I can’t think of another way to do this.
Maybe you could just spin down/turn off the disks? That will reduce power consumption a lot and they'll get up once requested.
So more like a commercial NAS box and less like a repurposed Dell server.
Why?
Power consumption.
Plus, I don’t think an enterprise grade server is designed to spin down the disks when they’re not in use.
You can just do that yourself regardless of what the server was intended to do, with a cronjob for example. You can also set an idle time after which it spins down with hdparm but that doesn't always work for different reasons.
How do I set a cronjob on a Hyper-V host?
No idea, does it pass the drives through?
Not with a RAID controller, no.
IDK if these support IT mode or the like, but yes, hardware RAID makes this hard.
Usually not, no. With that in mind, it seems I’m looking for something more like a commercial NAS box and less like a repurposed Dell server.
What are you doing with that much space?
Storing Linux ISOs, like everyone else.