How reliable/realistic is to use a laptop as a remote file backup server?

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Just make sure any power saving features are disabled. That is, if the 3000km journey to wiggle the mouse is not on your bucket list.

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The battery turning into a Spicy pillow is always a Concern for using laptop as an always powered on server. So even though you will be away from it, make sure that there is a way for someone to keep an eye on it, once every week or two.

That said, I have been using a dell laptop as a desk workstation (and remote use) with an uptime of 2.5 years at this point.

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fine.

I've been using two laptops als "servers" for years.
well, the first one died after about 6 years of use.

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It'll probably work. Biggest issue will be recovery after power failure as laptops generally stay off.

Next most likely is CPU fan failure, exacerbated if CPU usage causes the fans to run high and nobody is there to blow the dust out.

Other than that I've had multiple laptops that run as servers over the years and generally they're fine. (streaming audio for our community radio station, or shoved behind wall mounted TV's for updateable PowerPoint displays.

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This is a good point actually. I will need to check the laptop can run without battery at all (back in the day I remember this was possible, nowadays I am not sure)

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Thanks for the pointer. Indeed I should probably see first the homelab communities as well

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For sure not :D. I will be installing something such as ubuntu server, so I do not expect this issue (I don't remember if the laptop has power saving via bios, but need to check)

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You are not wrong with the vps. Although I am quite worried that my data stays with me no matter what. Not that I have state secrets or anything, but my stuff is my stuff. And to avoid issues with encryption and such, your own device most of the times is king

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At a later stage I will have to design a strategy to access and make sure is OK. Probably I am going to stick to talescale and make sure no matter what both talescale and ssh always start. Sure there can be issues but if minimal services can be guaranteed then it should mostly ok

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If you’re 3 thousand kilometers away from it I’d make it into a headless machine by unplugging the internal display and getting a kvm for it. Or just make sure you have contact with someone who can type in commands for you when anything goes really sideways

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I am planning after installing Ubuntu server and get some setup done, to actually sit it out and understand how much the fan is going and how I expect this to be an issue. Since my backups are probably going to be once in a week or so, I do not expect the laptop to have a lot of work (for now is just for file backup, no other services in there except tailscale)

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Yeah, what they said.

OP, invest in a UPS - cheap or less cheap - you can get them as big as your bank account, and they're worth it. I tend to like Cyberpower for price, because they're common enough that one never found a model that nuts didn't already know about, and they tend to have replaceable batteries. As parent said, the nightmare is if power for out, and even though the laptop has a battery, you're buying yourself extra time. Plus extra surge protection and all that.

I'm not probably saying anything you don't already know, OP, but I fell there's a general under-valuing of UPSes when I hear about people's set-ups. They may mention a surge protector, but rarely do I see folks taking about their UPSes.

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I actually have contingencies for this. There is a ups around that I can use. It is good advice for sure, specifically for countries with fluctuations on the electric grid

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I've got an old HP laptop which I've been running a Jenkins server on for years. The fan died back in like 2018, and I just kept putting off buying a replacement, so it has been running with no fan for 7 years now. Remarkably it still works fine, although a but slower than it used to thanks to thermal throttling

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Absolutely fair.

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If you can't access the hardware physically and you don't have someone on site who can work on it, just drop the idea and get a VPS or whatever cloud based. No matter what hardware you plan to use. Anything and everything can happen. Broken memory module, odd power surge, rodents or bugs messing up with the system, moisture or straight up water leak corroding something, fan failure overheating the thing and so on.

There's only one single fact on the business that I've learned over 20something years I've been working with IT: All hardware fails. No exceptions. The only question is 'when'. And when the time comes you need someone to have physical access to the stuff.

I mean, sure, your laptop might run just fine for several years without problems or it might have shipping damage over that 3000km and it'll break in a week. In either case, unless you have someone hands on the machine, it's not going to do much.

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Buy a KVM that you can wire to the power button if you can. Pikvm, nanokvm, Jetkvm, etc. Will save you when the device needs a reboot or a bios tweak.

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It's a laptop... One of the benefits is that it already has a battery, no?

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It would be nice if there was firmware available for the charge controller that turned the laptop's own battery into a UPS, avoiding the whole "spicy pillow" debacle.

One can dream...

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That is true, however there are 2 things

battery of this machine is toast (holds up for half an hour or less)
as someone mentioned in another comment: unattended laptops with batteries can be actually bad. Batteries on certain cases can leak and cause fires, so for me, if it can work without it great, otherwise I have to drop the idea

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How reliable/realistic is to use a laptop as a remote file backup server?