ATA66 CD-Burners?

[RLT65]

I cannot see why a burner would need to be ATA66 being that the fastest ones now write at 12X or 1800kb/sec. Why would it need the 66mb/sec burst speed? I just bought a new Ricoh that is only a PIO mode 4 not even ATA33, it works great.

[Dave2]

If you have 2 devices sharing the same IDE cable, such as a ATA 66 hard drive and a PIO 4 CD-ROM, the ATA 66 hard drive will slow down to PIO 4 speed. The fastest device on the IDE cable can only go as fast as the slowest device. My HP 9150i Burner is ATA 33 but does not run any faster than a PIO 4 Burner.

[Anakhonda]

A guy I work with just told me that there are CD Burners that can take advantage of ATA66 controllers. I thought ATA66 was only supported by hard drives (other IDE devices COULD run on these controllers, but would only run at their normal rate).

Are there really burners out there that can do this? Or is this guy just plain wrong?

[otheos]

Here we go again....

only non DMA devices slow down the bus!

So
ATA3+ATA4 on same bus -> each works at its speed

ATA3/4+ATA5 on same bus -> each works at its speed

PIO1/2/3/4+ATA2/3/4/5 on same bus -> all work at lowest PIO device mode!!

The reason new CD's and CDR/W's come in ATA3 is to avoid slowing down new ATA3/4/5 devices on the same bus. There is no reason to have ATA4 (UDMA66) CD/R/W's cause they do not need the burst speed and they do not slow down devices on the same bus if they are ATA3 anyway.

[NDC]

LOL, hello, Otheos. http://sysopt.earthweb.com/forum/smile.gif

Actually, I have no DMA33 or lower HDD's on any of my systems anymore so I have no concern for this issue anymore, but I still can't agree with you on what you're saying even to this day. I know that it says that on the site that you put a link for me a while back, and your system keeps both IDE channels at maximum burst rate from your testing and experience, but that just hasn't been the case for me on ALL the systems that I have. Don't get me wrong now! I'm not saying that I don't believe you! http://sysopt.earthweb.com/forum/smile.gif I'm just saying that it doesn't seem to apply for all DMA66 capable M/B's.

[NDC]

Just got me thinking...... Do you think it has anything to do with the chipset?

[This message has been edited by NDC (edited 11-16-2000).]

[otheos]

I have to be more conservative with my statements. http://sysopt.earthweb.com/forum/smile.gif
If it has not worked for you then experience is above sepcifications. My exeprience happens to prove the specification right, yours doesn't. I think someone with professional knowledge on the subject can enlighten us all.

[Dave2]

I had experience connecting my Zip 250 PIO Mode 3 drive on the same IDE cable as my ATA66 Hard drive. My hard drive slowed down from 4.5MB/s to 3MB/s uncached in Wintune 1.0.42. At Post it said the my Hard drive was still running at UDMA2 even though I had my Zip connected as a Slave on the same cable. I'm sure my hard drive was running at PIO Mode 3 because Wintune Disk uncached score slowed down significantly. It would be nice if CD-ROMs, DVD, Burners, and Zip drives had ATA 100 capablitity programmed in them so someone with an ATA100 hard drive wouldn't have to worry about slow down if they have one of these devices connected on the same IDE cable as the ATA100 hard drive.