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Seagate Exos X24 vs WD Ultrastar DC HC590 24TB

There's nothing clear-cut between them on paper, so buy whichever's cheaper on the day.

Compared on 10 specs from the makers' datasheets and Backblaze's failure data, and a group only gets a winner when the gap between the two is clear-cut.

Side by side

SpecSeagate Exos X24WD Ultrastar DC HC590
Reliability Only the Seagate Exos X24 is in Backblaze's data
Backblaze failure rateLifetime, 95% interval in brackets 3.03% (2.70%–3.39%) No data
Warranty and workload Level
Warranty 5 years 5 years
Workload ratingReads and writes a year 550 TB/yr 550 TB/yr
Where it fits Level
Line Data-centre Data-centre
Rated NAS bays Not stated Not stated
Recording CMR CMR
Noise and speed Level
Spindle speedFaster reads quicker, slower is quieter 7,200 rpm 7,200 rpm
Noise on the datasheetIdle / seeking, the maker's figure 28 / 32 dB 25 / 32 dB
Power The WD Ultrastar DC HC590 draws less at idle
Power at idleMaker's average 6.3 W 5.6 W (better)
Power in useMaker's average Not published 8.4 W

The Backblaze figures are lifetime annualised failure rates (Source: Backblaze), and we only call reliability when the two 95% intervals don't overlap.