Difference between IDE and SCSI ??

Markku Kolkka markkuk at tuubi.net
Tue Feb 5 18:31:35 UTC 2008

William Case kirjoitti viestissään (lähetysaika tiistai, 5. 
helmikuuta 2008):
> The schematics in the manual that came with my ASUS M2NPV-VM
> motherboard show the Southbridge chip as nForce 430MCP.  I
> assume this has been replaced by or contains a MCP51 IDE chip
> or configuration or something, that is identified by my
> Hardware browser (hwbrowser).

The Southbridge is a multifunction chip that shows up as several 
different peripherals in hwbrowser or lspci listings.
> I further assume that the MCP51 
> is the controller for the SCSI bus.

No. There's no SCSI bus in the nForce 430/MCP51.

> However, if that is true 
> why is it called MCP51 IDE.

Because it's an IDE controller, not SCSI.

> When I look on the bottom of an old drive (from a 4-5 year old
> machine -- not one of the Maxtors mentioned above, but a
> Maxtor nonetheless), there are several chips.  One of those
> chips, I assume,  contains the SCSI programm, protocol,
> commands, that interface with the SCSI bus or SCSI bus
> controller.

Yes, if it's a SCSI disk. No, if it's a SATA or ATA/IDE disk.

 Markku Kolkka
 markku.kolkka at iki.fi

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