Seagate Exos X20 20TB vs Western Digital WD Ultrastar DC HC560 20TB
The site holds no current price for at least one of these, so what follows compares specifications alone.
| Specification | SeagateExos X20 20TB | Western DigitalWD Ultrastar DC HC560 20TB |
|---|---|---|
| Capacity (GB) | 20000 | 20000 |
| Current best price | 719,99 €at Amazon.es · captured 2026-09-12 | — |
| Price per TB | 36,00 € | — |
| RPM | 7200 | 7200 |
| Cache (MB) | 256 | 512better |
| Form factor | 3.5-inch | 3.5-inch |
| Warranty (years) | 5 | 5 |
How these two compare
Sequential throughput
Western Digital WD Ultrastar DC HC560 20TB holds the higher sequential rate. Seagate Exos X20 20TB is rated 285 MB/s read and 285 MB/s write, Western Digital WD Ultrastar DC HC560 20TB 291 MB/s read and 291 MB/s write; a spinning disk's throughput rises with platter speed and density and barely differs between reading and writing.
Spindle speed
Both turn at 7200 RPM. Spindle speed sets how quickly the head reaches data and how much power and noise the drive makes, and at an identical RPM the two land in the same place on all of it.
Cache
Seagate Exos X20 20TB carries 256 MB of onboard cache and Western Digital WD Ultrastar DC HC560 20TB carries 512 MB — the buffer the drive uses to absorb bursts of writes and hold recently read data, smoothing over the mechanical delay of moving the head. More cache helps most under bursty, mixed workloads; for one long sequential transfer it barely matters.
Warranty
Seagate Exos X20 20TB carries a 5-year warranty and Western Digital WD Ultrastar DC HC560 20TB a 5-year one — how long the maker will replace a failed drive, and a rough read on the confidence it has in the mechanism.
Which to buy
With a price missing for at least one side, there is no cost verdict to give. What separates two otherwise-similar drives is up in the sections above — how fast the platters spin, how much cache each carries, the form factor and the warranty — so weigh those against what your build needs.
Common questions about this pair
- Which is faster, Seagate Exos X20 20TB or Western Digital WD Ultrastar DC HC560 20TB?
- Western Digital WD Ultrastar DC HC560 20TB holds the higher sequential rate. Seagate Exos X20 20TB is rated 285 MB/s read and 285 MB/s write, Western Digital WD Ultrastar DC HC560 20TB 291 MB/s read and 291 MB/s write; a spinning disk's throughput rises with platter speed and density and barely differs between reading and writing.
- Should you buy Seagate Exos X20 20TB or Western Digital WD Ultrastar DC HC560 20TB?
- With a price missing for at least one side, there is no cost verdict to give. What separates two otherwise-similar drives is up in the sections above — how fast the platters spin, how much cache each carries, the form factor and the warranty — so weigh those against what your build needs.