Seagate SSD 250 GB failure rate and reliability

C Grade C: Average

Backblaze logged 377 drive-years on the Seagate SSD from Q1 2023 to Q3 2026, with 97 in service at the end of that period. In that time 5 drives failed, an annualised failure rate of 1.33%.

That is close to the 1.52% average across every drive in the same data, which earns it grade C (average).

Among the 7 graded 250 GB SSDs it ranks 6 of 7 for reliability.

Failures have fallen: 0.51% over the latest 8 quarters against 2.22% before.

Failure rate / year: 1.33%
Average, all drives: 1.52%
Drives in use: 97
Drive-years: 377
Failures: 5
Capacity: 250 GB
Type: SSD
Model number: SSD

Failure rate by quarter

Quarter	Drive-days	Failures	Failure rate / year
Q1 2023	9,456	0	0.00%
Q2 2023	9,438	0	0.00%
Q3 2023	9,535	3	11.48%
Q4 2023	9,384	0	0.00%
Q1 2024	9,282	0	0.00%
Q2 2024	9,273	1	3.94%
Q3 2024	9,292	0	0.00%
Q4 2024	9,235	1	3.95%
Q1 2025	8,996	0	0.00%
Q2 2025	8,932	0	0.00%
Q3 2025	9,105	0	0.00%
Q4 2025	9,099	0	0.00%
Q1 2026	8,809	0	0.00%
Q2 2026	8,759	0	0.00%
Q3 2026	8,901	0	0.00%

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

All 250 GB SSDs compared

Grade	Model	Type	Size	Failure rate / year	Drives in use	Drive-years	Failures
A	Seagate IronWolf ZA250NM10002	SSD	250 GB	0.00%	201	510	0
A	Seagate BarraCuda 120 SSD ZA250CM10003	SSD	250 GB	0.20%	1,072	4,095	8
A	Western Digital WDS250G2B0A	SSD	250 GB	0.35%	170	576	2
A	Crucial CT250MX500SSD1	SSD	250 GB	0.36%	683	2,475	9
B	Seagate BarraCuda SSD ZA250CM10002	SSD	250 GB	0.74%	458	1,889	14
C	Seagate SSD	SSD	250 GB	1.33%	97	377	5
F	Western Digital Blue SA510 2.5 250GB	SSD	250 GB	4.80%	140	417	20