Leonard
On Sat, 5 Dec 1998, Alan Cox wrote:
> > 1. Some hard disk manufactures are using same disk drive (physically) to
> > make SCSI and ATA. They only change the PCB board.
> >
> > 2. SCSI-1 and SCSI-2 have 8 bit data bus, while ATA have 16 bit data bus.
> >
> > 3. ATA got disk cache built in as well.
> >
> > 4. Some low end of SCSI host card is only 8 Bit card.
> >
> > Compare by yourself.
>
> I have done several times. On my Cyrix MII box the IDE drive wins on bulk
> data (ie hdparm tests). It seems to be slightly lower CPU load than the
> SCSI controller too. When it comes to doing real work building a kernel
> with /usr/src on SCSI is about 20% faster than on IDE - this is a 5400rpm
> IBM scsi drive (DCAS-34330) on a buslogic 946 (ie fast not even ultra
> scsi) and narrow not wide.
>
> Most of my drives are still IDE, because I don't build kernels on them all..
>
> Alan
>
>
>
>
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