Bij Hardwareupgrade hebben ze een verhaaltje over ATA33 en ATA66. Ze hebben ook de verschillen getest tussen die twee :
The theoric explanation of the introduction of ATA-66 protocol is quite simple: the ATA-33 data transmission protocol, with a maximum transfer rate of 33 Mbytes per second, was too limited for the performance of most recent EIDE hard disks at 7,200 rpm (waiting for the introduction of models at 10,000 rpm), so the ATA-66 protocol, able to transfer 66 Mbytes per second, has be introduced. As the maximum transfer rate is achieved only in theory, that is when the disk buffer is empty moving the data directly to the EIDE controller and from it to the system memory, it is interesting to check how this interface affects the general performance.
To configure this test you need to consider many factors: first two different ATA-66 hard disks have been used with rotation speed of 5,400 and 7,200 rpm respectively; this allowed to analyse the different behaviour as the mechanic performance of the disk changed (at an higher rotation speed corresponds higher performances).
Lees hier meer.