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Seagate ST8000DM002 8 TB failure rate and reliability

D Grade D: Below average

Backblaze logged 32,297 drive-years on the Seagate ST8000DM002 from Q1 2023 to Q3 2026, with 5,927 in service at the end of that period. In that time 694 drives failed, an annualised failure rate of 2.15%.

That is 41% higher than the 1.52% average across every drive in the same data, which earns it grade D (below average).

Among the 5 graded 8 TB hard drives it ranks 2 of 5 for reliability.

The rate has been steady: 1.87% over the latest 8 quarters against 2.43% before.

Failure rate / year

2.15%

Average, all drives

1.52%

Drives in use

5,927

Drive-years

32,297

Failures

694

Capacity

8 TB

Type

HDD

Model number

ST8000DM002

Failure rate by quarter

Single quarters with few drive-days swing widely; the overall figure above is the dependable one.

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