Michael George <[EMAIL PROTECTED]> wrote:
>I have a new system with RH7.0 and an ASUS A7Vmb. It seems that there are 4
>connectors for IDE drives - two for UDMA33/66 and two for DMA100.
>
>Does that mean there are 2 ATA controllers on-board - each controls two
>connectors with each of 2 drives on them? Meaning that the hardware is
>already set up to handle up to 8 drives?
>
>Or can one use either set of connectors, but not both?
There are indeed two controllers. The one built into the chipset is
UDMA/66 and is controllable from the motherboard BIOS. That's the
connectors nearest the floppy connector. The other one is a Promise
UDMA/100. It is a separate controller mounted on the motherboard and
you'll see its separate BIOS probe for drives on a separate screen
during bootup.
The built-in IDE supports hda, hdb, hdc, and hdd. The Promise supports
hde, hdf, hdg, and hdh.
There doesn't appear to be any reason that the system won't support all
eight drives simultaneously if you have the appropriate cabling.
>I've been working with Linux a long time, but I'm not much of a
>hardware-head... I already have the two ATA66 controllers used (one for the
>HDD, the other for the CD-ROM and Zip250). I might be interested in putting in
>an ATA100 drive, but I'm not positive how those other two connectors work...
Note that the 2.2.x kernels require a patch to support the Promise in
UDMA/100 mode. The 2.4.x kernels have support built in.
Matthew Saltzman
Clemson University Math Sciences
[EMAIL PROTECTED]
http://www.math.clemson.edu/~mjs
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