Western Digital Blue SA510 2.5 250GB 250 GB failure rate and reliability

F Grade F: Poor

Backblaze logged 417 drive-years on the Western Digital Blue SA510 2.5 250GB from Q1 2023 to Q3 2026, with 140 in service at the end of that period. In that time 20 drives failed, an annualised failure rate of 4.80%.

That is 216% higher than the 1.52% average across every drive in the same data, which earns it grade F (poor).

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

Failures have fallen: 0.00% over the latest 8 quarters against 14.46% before.

Failure rate / year: 4.80%
Average, all drives: 1.52%
Drives in use: 140
Drive-years: 417
Failures: 20
Capacity: 250 GB
Type: SSD
Model number: Blue SA510 2.5 250GB

Failure rate by quarter

Quarter	Drive-days	Failures	Failure rate / year
Q1 2023	291	1	125.43%
Q2 2023	3,323	4	43.94%
Q3 2023	7,137	5	25.57%
Q4 2023	9,919	4	14.72%
Q1 2024	10,213	3	10.72%
Q2 2024	9,644	1	3.78%
Q3 2024	9,951	2	7.34%
Q4 2024	11,513	0	0.00%
Q1 2025	11,874	0	0.00%
Q2 2025	12,797	0	0.00%
Q3 2025	13,323	0	0.00%
Q4 2025	13,239	0	0.00%
Q1 2026	12,829	0	0.00%
Q2 2026	13,042	0	0.00%
Q3 2026	12,976	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