ata66 and ata33 on same ide channel?

[bdog]

If for example I have an ata66 mobo with an ata66 hd and an ata33 cdrom on the same ide channel, will the hd work at ata66 or will it default to ata33?

[Ygor]

Most ata66-capable hard drives ship defaulted to ata33. You must have a newer cable for the 66 speed. This cable has 40 pins, but each conductor has its own grownd, which makes it 40 pin, 80 conductor cable.
I have an ata-66 from Western Digital and just recently got the Promise Ultra 66 to run it on. The Promise pci card came with one cable.

[Brangwen]

jbob is right. I went through the WD HD ata/66 phase, and I learned that as long as you're using the 40/80 cable and the drive is capable of (and set to run at) ata/66, it will, and the slower HD (ata/33) will run at the slower speed or transfer rate.

[bdog]

Thanks alot for the info.

[bdog]

Thanks for the info. I have the ata66 cable. What I was wondering was if I connect this cable to an ata66 drive as master, and a standard cdrom as slave, will it be possible to have the hd work in ata66 mode? or will the ata33 device(cdrom) slow the whole channel down to ata33?

[jbob]

I know that on the BE6 boards, the DMA/66 BIOS will tell you if the drive is set to 66 or 33. It will run the drive at whatever the drive is set to.