Silicon Image EIDE Card and UDMA Mode vs Multi-word

vbimport

#1

Greetings.

I currently have a Plextor PX-708A and a PX-W4012A. I had both of these drives connected to the secondary IDE channel of my NForce2 board (using the Microsoft IDE driver) and they were both working happily in Ultra DMA mode.

I have since acquired a Silicon Imaged Si0680 based EIDE card and attached each of the writers to this card, one per channel, each as a master. The card is interfacing with them on Multi-word DMA Mode 2.

Why won’t it work on UDMA2? Both the drives and the card support it!

I am using the appropriate 80 pin 18-inch IDE cables for the interfacing, and the drives are the only things on their IDE channels on the EIDE card.


#2

I can’t find any detail on that card right now, but do you know for sure it’s capable of handling ATAPI devices? This is a known problem with PCI IDE cards.

MultiWord DMA should be fast enough for your optical drives btw…


#3

Originally posted by Dee-ehn
[B]I can’t find any detail on that card right now, but do you know for sure it’s capable of handling ATAPI devices? This is a known problem with PCI IDE cards.

MultiWord DMA should be fast enough for your optical drives btw… [/B]

This is the card I have. It certainly handles ATAPI devices as shown in the specifications.

Also I just noticed that all of a sudden, my writers are being detected as SCSI devices. For example, the Windows device manger says “PLEXTOR DVDR PX-708A SCSI CdRom Device” .

I don’t think that this is correct because these are in fact IDE drives.



#4

What happens if you enforce UDMA?
//Danne


#5

Im not sure if this is still true, but wasn’t a CDRom device on an extrenal ATA controller a good idea?

I have the same card (works fine and performs RAID and it was cheap when ATA 133 was still relatively new)…only HD’s on it…CD’s are connected to the Motherboard.


#6

Originally posted by DiiZzY
What happens if you enforce UDMA?
//Danne

You can’t. There’s no option for selecting the data transfer mode. It just shows you what the hardware selected.