You may know this, but for over 25 years hard disk drive manufacturers made use of zoned recording (more sectors on the outer tracks and fewer on the inner tracks) to maximize media recording density, but the inner tracks are slower as a result.
For a piece of custom test equipment I am building (which would stream long patterns stored on the drive), a 500GB 2.5" drive was split into four partitions: the first 40% for 70-80 MB/sec, 20% for 60-70 MB/sec, 20% for 50-60 MB/sec and the rest for 40-50 MB/sec.
Have you considered such partitioning?
For a piece of custom test equipment I am building (which would stream long patterns stored on the drive), a 500GB 2.5" drive was split into four partitions: the first 40% for 70-80 MB/sec, 20% for 60-70 MB/sec, 20% for 50-60 MB/sec and the rest for 40-50 MB/sec.
Have you considered such partitioning?
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