Hard drive as slave on same cable as ATAPI master?

On Mon, 28 Jul 2003 13:32:05 +1000, Tony Roe
wrote:

Hi,

My new PC has an Intel D875PBZ motherboard, which has only two IDE ports. I'll
be booting from a SATA drive, with a DVD-ROM and CD-RW on the IDE channels, and
I expected to also add UDMA100 removable drive caddies, so I can plug in
whatever other slave drive(s) I need (as I have on all previous PCs).

BUT the Intel mobo manual says, on p86 - "Do not connect an ATA device as a
slave on the same IDE cable as an ATAPI master device. For example, do not
connect an ATA hard drive as a slave to an ATAPI CD-ROM drive."

Can anyone suggest if this is correct, and why?

Regards,
Tony (remove "_" from email address to reply)

The cable defaults to the speed of the slowest device. So that would
be really bad in your case.
______________
French invasion:
http://www.metrospy.com/boycott_brands.htm

AJ wrote:

On Mon, 28 Jul 2003 13:32:05 +1000, Tony Roe
wrote:


Hi,

My new PC has an Intel D875PBZ motherboard, which has only two IDE ports. I'll
be booting from a SATA drive, with a DVD-ROM and CD-RW on the IDE channels, and
I expected to also add UDMA100 removable drive caddies, so I can plug in
whatever other slave drive(s) I need (as I have on all previous PCs).

BUT the Intel mobo manual says, on p86 - "Do not connect an ATA device as a
slave on the same IDE cable as an ATAPI master device. For example, do not
connect an ATA hard drive as a slave to an ATAPI CD-ROM drive."

Can anyone suggest if this is correct, and why?

Regards,
Tony (remove "_" from email address to reply)


The cable defaults to the speed of the slowest device.


A slower IDE device (not ATAPI device) will not cause a faster IDE
device on the same channel to default to the slower speed since the
advent of independent device timing common on harddisk controller
chipsets since 1995 provided the hardrive is not pio 0 (very old).
http://www.pcguide.com/ref/hdd/if/id...ormance-c.html
However, a CD drive on the same channel as a harddrive can slow down
that hard drive.

Tom

So that would
be really bad in your case.
______________
French invasion:
http://www.metrospy.com/boycott_brands.htm