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ATA/100 vrs. ATA/66 Hard Drive purchase?
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Forum Regular
Join Date: Aug 2002
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I have a dual 1GHz mirrored door drive Mac. I already purchased a 120 GB Barracuda V UATA/100 7200rpm internal hard drive. So that makes two ATA/100's. Do I now have to purchase an ATA/66? And does it matter in which bay these drives are placed to maximize throughput. In other words should each of the 100's be running off of each bus?
Thanks for the help,
Lou
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Senior User
Join Date: Apr 2002
Location: Stockholm Sweden
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You alredy have all the hardware to support 4 IDE drives so you do not have to buy a AT PCI card, if that is what you are meaning 
You can have both drives on the same bus or one on each, it will not affect performance. However, on each bus one is set to be "Master" with those small jumpers while the other has to be "Slave" and only Masters are bootable.
So if you want to have two bootable drives you better have them on two busses otherwise use the bays that are more convenient for you 
A ATA 100 drive means that the drive support that protocoll it does not mean that the drive can give that kind of output ( www.barefeats.com has a lot of disk tests)
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Forum Regular
Join Date: Aug 2002
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Thanks,
Put more clearly, my question is can I use an ATA 100 drive in an ATA 66 bus. I believe the100's are backwards compatible. I think the only bad thing is that I will take a small performance drop by putting the 100 in the 66.
Out of curiosity, how do you match the drives to the bus? ATA 100 to the correct bus and ATA66 to the correct bus?
Thanks
Lou
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Mac Elite
Join Date: Apr 2002
Location: Here and there
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Makes absolutely no difference at all.
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"Life is not a journey to the grave with the intention of arriving safely in one
pretty and well preserved piece, but to skid across the line broadside,
thoroughly used up, worn out, leaking oil, shouting GERONIMO!"
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Grizzled Veteran
Join Date: Apr 2000
Location: New York City
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I am fairly certain I boot off my slave right now (faster drive) - is that not possible?
Lee
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iPhone 3G 16Gb
24" 2.8Ghz Core 2 Duo iMac, 4GB/320GB/256MB
12" AlBook 1Ghz/768Mb/80Gb/Combo/AX
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Dedicated MacNNer
Join Date: Jul 2002
Location: Germany
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Originally posted by DrBoar:
...and only Masters are bootable.
Hi!
Are you sure about that? I have never heard that before.
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Mac Elite
Join Date: Nov 2001
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Originally posted by louh:
I have a dual 1GHz mirrored door drive Mac. I already purchased a 120 GB Barracuda V UATA/100 7200rpm internal hard drive. So that makes two ATA/100's. Do I now have to purchase an ATA/66? And does it matter in which bay these drives are placed to maximize throughput. In other words should each of the 100's be running off of each bus?
Thanks for the help,
Lou
Yes, you'll be able to do this. However, ATA/66 has a size limit... you may be unable to use a drive larger than 120(?) GB. Or the limit may be less.
If it were me, I'd get an ATA/133 PCI card or even a SATA PCI card and hook the drives to that, rather than use the ATA/66 bus.
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Addicted to MacNN
Join Date: Oct 2001
Location: BFE
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Originally posted by Taipan:
Hi!
Are you sure about that? I have never heard that before.
That's because it is not true. You can boot off any drive in the IDE chain, either bus. We are not talking about Windows machines.
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I'm a bird. I am the 1% (of pets).
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Mac Elite
Join Date: Jun 2000
Location: If I tellz ya, then I gotsta killz ya !
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re: "A person may not cross state lines with a duck atop his head. "
What about crossing a duck with a state line atop your head ??
hehehe 
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Personally I find it hilarious that you have the hots for my gramma. Especially seeins how she is 3x your age, and makes your Brittney-Spears-wannabe 30-something wife look like a rag doll who went thru WWIII with a burning stick of dynamite up her a** :)
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Posting Junkie
Join Date: Oct 2001
Location: South of the Mason-Dixon line
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Originally posted by Eriamjh:
That's because it is not true. You can boot off any drive in the IDE chain, either bus. We are not talking about Windows machines.
Windows can boot from a drive configured as 'slave'.
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