IDE, UDMA-32, ATA-66, ATA-100 compatibility

Larry,
If I have an ATA-66 hard drive connected with the proper ATA-66 cable set up as the master hard drive can I connect an old IDE or an UDMA-32 hard drive to the same cable as a slave even though the ATA-66 cable has so many more wires in it?

1. RE: IDE, UDMA-32, ATA-66, ATA-100 compatibility
lbyard Mar-27-01 04:18 PM
In response to message 0

LAST EDITED ON Mar-27-01 AT 04:22 PM (GMT)
Yes, but it may slow down the ATA/66/100 drive. 40 (or around that number) of those wires are ground wires. The plug has 39 holes like an ATA/33 cable. Consider putting it on the secondary IDE cable with the CD-ROM, if that is an option. Larry

2. RE: IDE, UDMA-32, ATA-66, ATA-100 compatibility
deerslayer Mar-27-01 04:53 PM
In response to message 1

I have an older western digital udma 33 5400rpm 13 gig hard drive as my master. I have a Maxtor ata 66 7200 rpm 30 gig as the slave. They are plugged into IDE 3 for ata 33,66, and 100. ( they do not recommend cd rom devices on ide 3 and 4.) they are running in mode 4 with 5 being the highest for ata 100.According to my mobo book you can hook up legacy drives to the ata 100 ide's and it will boost performance up to 99mb/sec. I ran a few benchmarks and it was cruising along @ 90 mb/sec in the test.
While on the subject of hard drives. Larry, if I get another ata 66 7200 rpm 30 gig from Maxtor can I run this in raid configuration?? Abit book doesnt really say ( just says 100).I was thinking since the 66 uses the same ide cable as 100 it would work. I have heard from many people that the ata 100's have very little performance increases from the 66's. I would rather get 1 66 than 2 100's.
thanks!
633 Celeron @1055, Abit bx-133, 384 Kingmax pc 133 @ cas 2-2-2, ATI radeon 64 mb DDR 16 fans

3. RE: IDE, UDMA-32, ATA-66, ATA-100 compatibility
lbyard Mar-27-01 05:11 PM
In response to message 2

I haven't done it, but I would think that you could. The Maxtor drive is really quite; I have one in my machine. Larry