IDE transfer speed adjustment in XP

  • Thread starter Thread starter Dan Grant
  • Start date Start date
D

Dan Grant

I recently upgraded to a P4 2.6Ghz with 1Gb of RAM
running XP Home. My drives are dual 80GB (not SATA)

One of our tech support people asked if i'd changed the
IDE transfer speed. He hold me that he 'understands'
that XP defaults to a lower speed than modern
motherboards and drives are capable of....he seemed to
think it defaults to 66 when it could be 100. He also
indicated that there is a registry entry that has to be
changed to adjust this. Is this true? Can anyone give
me some guidance on this?

Thanks
 
Hi, new one on me, XP usually only defaults to a lower speed when it
perceives a hardrive problem or when the correct drivers aren't
installed....
Chris C
 
What he's talking about is that XP does not, by default, turn on support for
UDMA66 hard drives, it defaults to UDMA33. You will have to edit the
registry to fix the problem; assuming you have ATA66 or 100 hard drives.

Locate
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class\{4D36E96A-E325-11C
E-BFC1-08002BE10318}\0000. Right-click to create a new DWORD value,
EnableUDMA66, and give it a value of 1.
 
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