Korbin is a Linux system administrator who spends most of his time in a terminal figuring out how things actually work. Over the last decade he's written hundreds of articles about Linux configuration, troubleshooting weird problems, and using open-source tools in the real world.
He also works a lot with Windows systems and networking, especially in mixed environments where things don't always behave the way the documentation says they should. Writing things down is how he makes sense of it all and hopefully saves someone else a few hours.
When I first got into home storage, I assumed that I would need to pick up a NAS. You know, one of those sleek little towers from a manufacturer like QNAP or Synology. They come with bays where hard drives slide in easily, plus a full-fledged app store tailored to storage devices.
Technically, though, any system can be turned into a NAS. Even one that started out with a totally different purpose. My current NAS served me well as an office PC for a few years before I transitioned it to its current role. I figured, why buy a new machine to house a few hard drives, when I have a PC right here that I'm ready to retire, anyway? So, I stuffed four drives inside, and it's been serving storage to my whole network ever since.
The first obstacle was fitting the drives inside
I came up with a creative solution to that problem
My Dell OptiPlex is a mini tower that has two internal 3.5" drive bays and two external 5.25" bays. I could fit an additional hard drive, but I'd have to yank out the optical drive to expand beyond that. I can't remember the last time I used any optical media, so I didn't mind letting go of the DVD drive. Then I bought two 5.25" to 3.5" bay adapters off Amazon so I could turn those bays into slots for regular hard drives.
The motherboard already had four SATA ports, so I got lucky. But if it hadn't, it'd be a prime candidate for an HBA card. My power supply didn't have enough connectors for the two new drives, but I easily fixed that with a SATA power splitter.
Once the tower was fitted with four 8TB drives, there was only one more problem to tackle. I wanted to use all those hard drives in a RAIDZ1 pool, but that meant I needed another drive just for the OS. Since I was already using all the SATA ports, I decided to run TrueNAS from a flash drive.
I didn't want to plug the flash drive into the case itself, so I plugged it into one of the motherboard's internal USB headers. That required yet another adapter to go from a header plug to USB-A female, but it worked, and it seemed more elegant than plugging an external drive into the case. TrueNAS is remarkably lightweight anyway, so it doesn't need much to run.
This setup beats buying a new system
And it works just as well as a NAS appliance
I'd understand if someone thought using an office PC as a NAS was just a budget-friendly compromise instead of buying an actual appliance. But I assure you, that's not the case. If anything, I like this setup better, because many dedicated NAS systems come with energy-efficient (read: underpowered) CPUs and just enough RAM for file serving.
My transformed office PC, on the other hand, has plenty of extra RAM for Docker containers and the occasional virtual machine. Its x86 CPU, even though it's considered old now, is enough for some Plex transcoding or other demanding tasks that would tax a lot NAS appliances far above what they're built to handle.
Even if those advantages weren't convincing enough, I was ready to go the DIY route for the price difference alone. I already owned all the hardware I needed, except for the hard drives and the few inexpensive adapters I bought. NAS appliances are sleek and small, but you pay a premium for that design and convenience.
Consumer NAS systems keep selling for a reason
They're easier to use than a modified PC
NAS brands like Synology and QNAP have a solid reputation overall. Their hardware is tailored for an always-on storage device, with hot-swappable disk bays in a low-noise chassis. Their software keeps everything simple, too, so any normal consumer can buy one of these devices off the shelf and have a NAS serving their whole network within an afternoon. For a lot of people, I'd recommend these systems.
On the other hand, I'd recommend against them for the home-lab and self-hosting crowd, or really anyone technically inclined who already has spare hardware lying around. If you don't need the convenience a NAS appliance offers, it's better to live without the inherent ceiling it comes with. You have more options with your own tower. Plus, a repurposed desktop is more powerful and more upgradeable.
From desktop PC to network backbone
It's funny to think that my NAS did nothing more than office tasks and web browsing a few years ago, and now it stores every photo, document, and file I care about. You wouldn't know it from the outdated PC tower in the corner of my office, but that system is the best NAS I've ever had.