fallocate -l 50G testfile.sparse To force real allocation:
$out = new-object byte[] 53687091200 (New-Object Random).NextBytes($out) [System.IO.File]::WriteAllBytes('C:\test\50GB.bin', $out) Warning: This will consume 50 GB of RAM temporarily – not recommended on systems with <64 GB RAM. 50 gb test file
: Generate your own 50 GB test file today using the dd or fsutil commands above. Run a sustained write test on your primary drive. You might be surprised how quickly the advertised speeds vanish – and that’s the first step toward fixing them. Have questions about generating or using a 50 GB test file? Leave a comment below or reach out to our benchmarking community. And remember: always delete the test file after your benchmarks – 50 GB of disk space is too precious to waste. Word count: ~2,100 (expanded easily by adding tables of benchmark results from real drives or step-by-step screenshots of each method). fallocate -l 50G testfile