Toshiba HDWF180 8 TB failure rate and reliability

– Not graded: too little data

Backblaze logged 202 drive-years on the Toshiba HDWF180 from Q1 2023 to Q3 2026, with 47 in service at the end of that period. In that time 10 drives failed, an annualised failure rate of 4.95%.

That is too little running time to grade: we require 100,000 drive-days, and this model has 73,746. Treat the rate as a rough indication only.

Failures have fallen: 1.88% over the latest 8 quarters against 8.35% before.

Failure rate / year: 4.95%
Average, all drives: 1.52%
Drives in use: 47
Drive-years: 202
Failures: 10
Capacity: 8 TB
Type: HDD
Model number: HDWF180

Failure rate by quarter

Quarter	Drive-days	Failures	Failure rate / year
Q1 2023	2,186	0	0.00%
Q2 2023	5,577	3	19.63%
Q3 2023	5,594	1	6.52%
Q4 2023	5,532	1	6.60%
Q1 2024	5,409	1	6.75%
Q2 2024	5,365	0	0.00%
Q3 2024	5,314	2	13.74%
Q4 2024	5,216	2	14.00%
Q1 2025	4,939	0	0.00%
Q2 2025	4,990	0	0.00%
Q3 2025	5,052	0	0.00%
Q4 2025	5,050	0	0.00%
Q1 2026	4,759	0	0.00%
Q2 2026	4,369	0	0.00%
Q3 2026	4,394	0	0.00%

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

All 8 TB hard drives compared

Grade	Model	Type	Size	Failure rate / year	Drives in use	Drive-years	Failures
A	Seagate ST8000NM000A	HDD	8 TB	0.37%	229	806	3
D	Seagate ST8000DM002	HDD	8 TB	2.15%	5,927	32,297	694
D	HGST HUH728080ALE600	HDD	8 TB	2.39%	101	3,554	85
D	Seagate ST8000NM0055	HDD	8 TB	2.85%	12,700	50,867	1,449
F	HGST HUH728080ALE604	HDD	8 TB	5.53%	68	308	17
–	Toshiba HDWF180	HDD	8 TB	4.95%	47	202	10
–	Seagate ST8000DM005	HDD	8 TB	1.16%	15	86	1
–	HGST HUS728T8TALE6L4	HDD	8 TB	1.39%	18	72	1