Is the data loss worse if a big drive fails?

Yes, a single big drive holds more, so one failure loses more at once. But the answer is not smaller drives, it is redundancy. RAID or RAIDZ plus an offsite backup means any single drive dying is harmless.

Should I avoid 20TB drives because they are new?

No need to avoid them, but the very newest, largest drive sometimes carries an early adopter premium. Dropping one capacity step often improves price per TB while keeping the same reliability.

Are Bigger Hard Drives Less Reliable?

Q: Are bigger hard drives less reliable than smaller ones?

Not in any meaningful way. Large-scale failure data shows high-capacity modern drives fail at rates similar to smaller ones. Reliability tracks the specific model and your cooling far more than raw capacity. Buy the capacity with the best price per TB.

Published: 23 juli 2026

Live answer · Amazon.com

Pulling live prices…

📊 As of July 25, 2026, the typical HDD (12TB+) on Amazon.com is $38.86/TB or $0.039/GB, widest choice around $26.04/TB, with some as cheap as $22.86/TB across 608 live listings.

Sourced from real discussions on r/DataHoarder and r/homelab, cross-checked against live PricePerGig listings.

Are larger hard drives more likely to fail? Short answer. No. So why does it feel like they do, why does ‘seem’ like they are more likely to fail? Ultimately if you’re a bit of a datahoarder and one of your small drives fails, the chances of that one drive having anything super important on it are reduced compared to a huge 24 or 32TB drive. When a 32TB drive fails, you’re going to ‘feel the pain’ and so this makes it a much more emotional affair.

The data proves over and over, larger drives are not more likely to fail, not less likely either, just as likely to fail. You can compare and see actual failure rates here.

The table above shows the live price per TB for hard drives of 12TB and up on your marketplace, where the big drives win on value, so it is worth knowing they are safe to buy.

What the failure data actually says

Large-scale studies track tens of thousands of drives across every capacity. They keep showing the same thing.

High-capacity modern drives fail at rates broadly similar to smaller ones.

Reliability tracks the specific model, the manufacturing batch, the workload and the cooling. It does not track raw terabytes. A well cooled 20TB drive is not living on borrowed time compared to a 4TB one.

So the instinct that bigger equals fragile just is not supported by the numbers.

The grain of truth: more eggs, one basket

There is one real point hiding in the fear, and it deserves respect.

A big drive holds more data. So if it dies, you lose more at once than if a small drive dies.

That is true. But notice what it actually argues for.

It does not argue for buying smaller drives. It argues for redundancy. The fix for any drive failure is RAID or RAIDZ plus a backup, not crippling your value by buying tiny disks.

Protect the data with parity, not by hobbling your capacity.

Why small drives are the false comfort

Here is the trap people fall into.

Buying lots of small drives feels safer. It is not.

More drives means more motors, more power, more heat, more cables, and more individual things that can fail. You have spread your risk across more failure points, not fewer, and paid a worse price per TB for the privilege.

A few big drives with redundancy is both cheaper and simpler than a wall of small ones. Look at the live table and the value gap is obvious.

How to buy big with confidence

The sensible approach.

Pick the capacity with the best price per TB on the live table above.
Maybe step down from the very newest, largest drive if it carries an early adopter premium.
Run redundancy so any single failure is a non event.
Keep an offsite backup of the irreplaceable stuff.

Do that and big drives are a pure win, value and safety both.

The bottom line

Bigger hard drives are not meaningfully less reliable. A failure loses more at once, but the answer is redundancy, not smaller drives.

Buy the best price per TB on the live table above, usually a big drive, run RAID or RAIDZ, keep a backup, and store fearlessly. The big drives are where the value is, and they are perfectly safe to trust when you back them up right.

So no, large hard drives are not more likely to fail, but you are for sure more likely to feel the pain, so make sure you backup and pick up some high capacity drives.

What the failure data actually says

The grain of truth: more eggs, one basket

Why small drives are the false comfort

How to buy big with confidence

The bottom line

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