scsi&ide

I don't quite follow the question. But I do know that if you are talking hard drives when you say IDE, then that must be your boot disk. Mixing ide qwith scsi is not a good option in my opinion for what it is worth.

Yes, you can have both SCSI and IDE drives.
For the SCSI drives, you need a seperate plug in card, unless your motherboard has built-in SCSI.
I have seen very few with built-in SCSI.

Then, you need to decide what drive will be the boot drive.
If you want to boot off of the SCSI drive, you need to set the appropriate options in the boot section in BIOS settings.
This is also where you setup to boot off of any plug-in drive controller card.

I have an ASUS A7A, it does not have built-in SCSI, it does have a built-in Promise ATA100 IDE controller.
I have my hard drives on the Promise controller, and the BIOS set to use SCSI, with ATA100 before SCSI.
I had problems placing a CD drive as the master on the primary IDE channel. With only 1 CD drive on the primary, set to slave, things work fine.

Chas

As in answer1&2 you can have both IDE and SCSI HDD in your system but you can boot only from IDE HDD.
In this situation the SCSI HDD (which is expensive) will not be used efficient and don't give you all it performance.

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