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Are there different IDE cable speeds?

post #1 of 8
Thread Starter 
Using HD tune, I tested out the transfer rates of my secondary HD, and it averaged around 30 MBps. My primary drive averaged around 50MBps. Then I switched the cables and the secondary drive went faster while the main drive went slower.

So obviously one of the IDE cables is faster the other. How can I tell and when I go to buy a new cable, which one should I be looking for? They're both IDE hard drives.

Thanks!
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post #2 of 8
The CDROM (or an older hard drive) on the second cable slows down everything else attached to it.
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post #3 of 8
yep, there are different cables:
http://www.pcguide.com/ref/hdd/if/id...Cable80-c.html

You probably have a 40-conductor and a 80-conductor cable. Makes quite a difference

Check article for differences.
    
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post #4 of 8
Generally, when your computer is posting it will tell you if you are using an IDE 40 cable nowadays.
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post #5 of 8
Thread Starter 
I just took a look in the case and yep, the faster cable is an 80 pin, while the slower one is 40. Thanks!
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post #6 of 8
Quote:
Originally Posted by Manyak View Post
The CDROM (or an older hard drive) on the second cable slows down everything else attached to it.
Not necessarily. If the CD rom is idle, there will be no performance difference (or little).
    
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post #7 of 8
Quote:
Originally Posted by Chozart View Post
Not necessarily. If the CD rom is idle, there will be no performance difference (or little).
I'll admit I havent worked much with IDE since SATA came out, but back then if you had a really old device that ran on an older ATA spec it would slow the entire bus down to its speed.

So like, if the hard drive was Ultra-ATA/100 and the CDROM was ATAPI-4 (33MB/s), the bus would be limited and the hard drive would be brought down to ATA/33.

If they managed to finally fix that stupid problem, I'd love to know
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post #8 of 8
Ok so i did some research, and apparently they fixed that "feature" not too long before SATA.

Good to know.
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