[QUOTE=Millennium12;2499422]I don’t like the blue curve - fall is too steep meaning this drive, in the outer zone, is performing at only half speed coming close the the performance of a DVD drive.[/QUOTE]
[QUOTE=Millennium12;2499437]looking here http://en.wikipedia.org/wiki/Hard_disk_platter
sector 0 is next to the spindle (inner zone) with highest transfer rate while the last sector is at the outer end of the platter with the lowest transfer due to a longer seek timing. The graph clearly shows highest transfer rate at 0 GB. Therefore 73MB position is at the outer end of the platter (1GB position), not inner.
you think me wrong?
btw, my DVD has a burst rate of 75 MB/s[/QUOTE]
Actually, the “75 MB/s” burst speed from your DVD drive is only from its SATA interface connection (between the drive’s cache buffer and the motherboard’s controller) - in most cases, that would be the speed of the drive’s cache memory buffer itself. Physically, no current DVD drive can read or write any faster than 24x (or just slightly over 30 MB/s) due to rotational speed issues (the DVD drive requires at least 25,000 RPM - more than fast enough to cause any optical media to physically shatter into trillions of pieces, since even the most robust optical media can only withstand rotational speeds up to just over 10,000 RPM - in order to physically read or write at 75 MB/s even on the outer tracks). The blue curve in HD Tune refers to the physical sequential transfer speed of the tested hard drive. That’s the big difference between the two.
And as I stated, modern hard drives actually read from the outer edge inwards - not from the inner hub outwards. And today’s hard drive read/write technology is very different from what was the case back in the late 1980s and early 1990s: Those early drives wrote the exact same amount of data per track regardless of the linear speed of each track. But today’s drives write the same amount of data per linear inch of a track, which results in the outer tracks holding much more data than the inner tracks per rotational circumference.