Beginner Home Server Setup: A Complete $1,204 Build

This is the cheapest complete home server that is actually finished: redundant, protected against a power cut, and backed up to a second copy. Everything on the list is a real product at a real price, and the total is about $1,204. Buy all of it and you have a working server. Buy most of it and you have an expensive single point of failure.

Before the parts list, the one number that reorders everything. The enclosure is about 20 percent of this build. The two drives are 48 percent, and the backup drive is another 23 percent. Most first-time buyers spend three weeks comparing two-bay boxes that differ by $60, then buy whichever drives are cheapest that week. That is backwards. The box is a one-time purchase; the drives are where the money goes, and they get replaced and upgraded for as long as the server exists.

What capacity do you actually end up with?

Two 8 TB IronWolf drives give 16 TB raw and 8 TB usable, because a mirror keeps one complete copy on each drive. The other 8 TB is not wasted, it is the redundancy you are buying. Your NAS will report that usable figure as 7.28 TiB.

That difference confuses more people than any other number in storage. A terabyte and a tebibyte are not the same unit. One TB is exactly 1,000,000,000,000 bytes, the decimal figure printed on the drive label. One TiB is 2 to the power of 40 bytes, or 1,099,511,627,776, which is what Windows and almost every NAS interface reports while still labelling it "TB". The ratio is a fixed 0.909495, so every capacity looks 9.05 percent smaller once the operating system gets hold of it. Nothing is missing. The TB against TiB chart has the conversion at every capacity.

On top of the units, the filesystem takes a genuine cut. Ext4 and Btrfs reserve roughly one to two percent for metadata and superblock copies, so plan on about 7.1 to 7.2 TiB of space you can actually fill. That is still a very large amount of documents and photographs, and a fairly modest amount of video.

Read that table as the honest boundary of this build. Two bays and 8 TB usable is generous for documents, photographs and computer backups, and it is not enough for a serious 4K video library. If the last two rows describe what you actually want to store, skip this tier and read the intermediate build, because you will fill this one within a year and drive-by-drive upgrades on a two-bay box are the slowest and riskiest way to grow.

Why two bays rather than four?

Four bays is more efficient per drive. With four members and one drive of parity you keep three quarters of what you buy, against half in a mirror. That efficiency is real, and it is not the right first purchase for most people, because it doubles the day-one drive bill from about $580 to about $1,160 in exchange for capacity you have not yet proved you need.

There is also a subtler argument. On a two-bay mirror, replacing both drives with larger ones later is straightforward and the intermediate steps still work. On a four-bay running RAID 5, replacing two of four drives with larger ones gains you exactly nothing until every member is upgraded, because standard RAID truncates every drive to the size of the smallest one. Synology SHR is the only consumer scheme that escapes this, and it is the main reason to pay Synology prices. Our SHR against RAID 5 comparison works through the band arithmetic, and the cross-vendor RAID calculator will show you the stranded capacity for any drive set you type in.

Why these specific drives?

Two requirements are not negotiable and one is a preference.

CMR recording, never SMR. Shingled magnetic recording overlaps tracks like roof tiles to raise density, which means rewriting a sector can require rewriting its neighbours. Under the sustained random writes of a RAID rebuild, an SMR drive can slow to a crawl and turn a rebuild that should take a day into one that takes several, during which the array has no redundancy. The IronWolf line is CMR, as are WD Red Plus and Toshiba N300. The plain WD Red line historically included SMR models, which is exactly why the Plus suffix matters.

A published workload rating. NAS drives publish a rating in terabytes written and read per year, typically 180 TB for consumer NAS drives and 300 to 550 TB for the Pro and enterprise tiers. A desktop drive with no rating is not designed to spin continuously, and its warranty often says so.

Rotational vibration sensing is the preference. It matters more as bay count rises, because drives vibrate against each other in a shared chassis. In a two-bay box it is close to irrelevant, which is one of the few places this build genuinely gets to save money. Full detail lives in how to choose NAS drives.

What can you skip?

Three things, in descending order of how comfortable you should feel about it.

The switch, for now. Your router already provides ports. A 2.5 gigabit switch at about $35 raises the ceiling from roughly 113 MB/s to roughly 280 MB/s, which you feel on every large transfer, but nothing stops working without it. It is the first thing to add, not the first thing to buy.

Extra memory. This enclosure ships with 8 GB, which is plenty for file sharing and a few containers. Memory only becomes the limit when you start running virtual machines, and if you are running virtual machines you are not building this tier.

An SSD cache. Skip it entirely at this level. A read cache helps random access patterns and does essentially nothing for the sequential streaming that a home media library consists of. See the SSD guide before spending anything here.

What you cannot skip is the second copy. If the budget only reaches four of the five lines, drop to smaller drives rather than dropping the external backup drive. A 4 TB mirror with a backup is a finished server. An 8 TB mirror without one is a single point of failure that happens to have two drives in it.

What should you upgrade first?

In this order, and the order is deliberate.

• The network, at about $35. The TP-Link 2.5GbE switch is the best value upgrade in home storage. Real throughput goes from about 113 MB/s to about 280 MB/s. See 2.5GbE against 10GbE for why 10 gigabit is the wrong next step on a two-drive array.
• A third copy, kept elsewhere, at about $225. A second external drive stored at work or with a relative turns two copies into three and covers the fire and theft cases that no amount of on-site hardware can. Size it with the 3-2-1 backup sizing calculator.
• Capacity, when you are genuinely at 80 percent. Not before. On a mirror this means replacing both drives, so it is the point at which moving to the intermediate build and keeping this box as a backup target starts to look better than buying two larger drives.

What does it cost to leave running?

Two spinning drives at 6 to 9 W idle plus an x86 board at 15 to 20 W puts this build around 30 to 38 W at idle. At 8,760 hours a year and a tariff of 17 cents per kWh that is roughly $45 to $57 a year, using W / 1000 x 8760 x tariff. Over five years the electricity is around $250, which is more than the enclosure cost and worth knowing before you leave a bigger machine running instead. Put your own tariff into the power draw calculator.

Runtime on the 650 VA UPS at that load is comfortably more than the couple of minutes a clean shutdown needs. Remember that VA is not watts: consumer units publish a power factor around 0.6 to 0.9, so a 650 VA unit delivers roughly 390 W. The UPS runtime calculator does the conversion and shows how runtime falls away faster than load rises.

Where this build sits against the others

The jump from this tier to the next is roughly $2,335 for three times the usable capacity and a second drive of parity. That is good value per terabyte and it is still $2,335, so buy it when the capacity table above says you need it, not because the specification reads better.

Related reading

• Cross-vendor RAID capacity calculator, for any drive set including mixed sizes
• Best budget NAS, the enclosure alternatives at this price
• Best NAS hard drives, where most of this budget goes
• The order to buy things in
• The 3-2-1 backup rule, because the array is only copy one
• All three complete builds compared