Seagate Exos X20 20TB vs Western Digital WD Ultrastar DC HC560 20TB
Seagate Exos X20 20TB and Western Digital WD Ultrastar DC HC560 20TB each win something the other does not — the choice is which of those you want.
| Specification | SeagateExos X20 20TB | Western DigitalWD Ultrastar DC HC560 20TB |
|---|---|---|
| Capacity (GB) | 20000 | 20000 |
| Current best price | 619,00 €betterat Amazon.de · captured 2026-09-09 | 1.077,26 €at Amazon.de · captured 2026-09-13 |
| Price per TB | 30,95 €better | 53,86 € |
| 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.
Price
Seagate Exos X20 20TB lists at 619,00 €, or 30,95 € per TB; Western Digital WD Ultrastar DC HC560 20TB at 1.077,26 €, or 53,86 € per TB.
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
There is no outright answer — each takes something the other gives up. Decide which of those advantages matters for your build; the comparison above lays out both sides.
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.
- Which costs less per terabyte, Seagate Exos X20 20TB or Western Digital WD Ultrastar DC HC560 20TB?
- Seagate Exos X20 20TB lists at 619,00 €, or 30,95 € per TB; Western Digital WD Ultrastar DC HC560 20TB at 1.077,26 €, or 53,86 € per TB.
- Should you buy Seagate Exos X20 20TB or Western Digital WD Ultrastar DC HC560 20TB?
- There is no outright answer — each takes something the other gives up. Decide which of those advantages matters for your build; the comparison above lays out both sides.