Data Erasure Time Benchmark

Real-world erasure time benchmarks based on analysis of MASAMUNE erasure logs (Dec 2024 — Dec 2025). Outliers excluded using IQR method.

Erasure Time by Device Type

Device Type	Average	Median	Min	Max	Avg Speed
iPhone	18m 28s	15m 30s	26s	1h 8m	N/A
iPad	13m 56s	11m 21s	1m 20s	47m	N/A
Android	8m 11s	7m 48s	44s	25m 40s	N/A
NVMe SSD	16m 3s	15m 25s	1m 29s	39m 37s	344 MB/s
SATA SSD	25m 42s	17m 48s	2m 23s	1h 47m	344 MB/s
HDD	2h 5m	1h 34m	22m	8h 4m	116 MB/s

Erasure Method Comparison

Method	Average	Median	Min	Max
Apple iOS Erasure	20m 37s	15m 26s	2m 50s	5h 47m
Android OS Erasure	8m 21s	7m 47s	44s	1h 1m
Baseline Standard	2h 58m	20m 41s	48s	—
Secure Erase	1m 10s	1m 10s	1m 10s	1m 10s

Erasure Time by Capacity

Capacity	Average	Median
0-16GB	8m 48s	7m 18s
16-32GB	11m 45s	9m 24s
32-64GB	18m 54s	13m 33s
64-128GB	18m 48s	12m 58s
128-256GB	1h 22m	13m 12s
256-512GB	55m 37s	56m 26s
512GB-1TB	2h 3m	1h 56m
1-2TB	3h 36m	3h 31m
2-4TB	5h 28m	5h 39m

Top Storage Models

Model	Capacity	Avg Time	Avg Speed
SK hynix BC711 (NVMe)	238 GB	9m 3s	453 MB/s
SAMSUNG MZNLN256 (NVMe)	238 GB	14m 41s	299 MB/s
INTEL SSDPEKKF256 (SATA)	238 GB	14m 32s	280 MB/s
SAMSUNG MZVLQ256 (NVMe)	238 GB	17m 25s	235 MB/s
ST500DM002 (HDD)	466 GB	49m 20s	161 MB/s
WDC WD5000AZLX (HDD)	466 GB	1h 13m	126 MB/s

Analysis period: Dec 2024 — Dec 2025. Outliers excluded using 3×IQR method. Single-pass methods only.