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hd and cdrom to same ide

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hd and cdrom to same ide

Postby durul on Tue Oct 28, 2003 5:31 am

Hi,

I recently upgraded my system. Now i have an udma 100 hd, a cdrom drive and a cd-writer. In my old system my old hd(udma 33) and cdrom drive were in one ide port and cd-writer was on the second ide in order to copy cds on the fly. I want to copy cds on the fly with my new system also but i know that it is not recommended to connect cdrom drive together with udma 100 hd. Anyway, if i connect hd and cdrom drive to the same ide port with 80 pin cable what will be the result? Will it slow down the hd? What can i do to copy cds on the fly safely?

Thanks
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Postby Scour on Tue Oct 28, 2003 7:22 am

Hello!

The most important things is that the CD-Rom and CD-writer are not connected on the same IDE-port.

I recommend to use a 80-pin-cable for the HDD; but some CD/DVD-drives don´t like this, you have to test it.

If you have a UDMA33 and UDMA100-drives at one cable, it only slows the 100-device down when the 33-device works
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Postby Nerva on Tue Oct 28, 2003 12:04 pm

Scour wrote:The most important things is that the CD-Rom and CD-writer are not connected on the same IDE-port.


Why? i have such connections and every works fine
HD - master on ide0
DVD/CD-RW - master on ide1
CD-ROM - slave on ide1

im copyn' on fly and so on and nothing bad occured
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Postby CDRecorder on Tue Oct 28, 2003 1:08 pm

On a modern system, it really shouldn't matter how you hook up the drives. Try hooking up the CD-RW and the CD-ROM to the secondary IDE channel with the hard drive on the primary channel. Since your system is new, on-the-fly copying should work fine that way.
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Postby mrk1283 on Tue Oct 28, 2003 6:42 pm

optical drives can be on any port it does not matter. I had my pioneer dvd 106/s (ATA66) on sec master and my liteon 52327s (ATA33) on sec slave, both being seen prperly and their correct types and my hd (ATA133) as pri master, I could eaisly have the pioneer on pri slave and it would run at ata66 while my hd is at ata133 and all would be fine, the important thing is that you do not have a for example ata100 and an ata66 hdd on the same cable otherwise both will default to ata66 (the slowest)
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Postby CDRecorder on Wed Oct 29, 2003 1:16 am

mrk1283 wrote:the important thing is that you do not have a for example ata100 and an ata66 hdd on the same cable otherwise both will default to ata66 (the slowest)


I don't think this applies to modern computers; each drive runs at the maximum speed that it supports (assuming the IDE controller supports that speed). However, when transferring data from one drive to another, the slowest drive will limit the transfer rate.
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Postby rdgrimes on Wed Oct 29, 2003 1:50 am

However, when transferring data from one drive to another, the slowest drive will limit the transfer rate.

Given the same spindle speed and other general similarities, an ATA66 and an ATA100 will run at the same speed anyway. A common misconception is that a UDMA100/133 drive is faster than UDMA66. Not true. The UDMA rating is for the interface, not the drive itself. Very few, if any, UDMA100/133 drives will ever exceed 66 MB/Sec transfer speed. More like 45-55.
In any case, you can mix and match as you like on any current MB.
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Postby mrk1283 on Wed Oct 29, 2003 2:13 am

Yup, I was aware of that physical factor of xfer speeds etc

My maxtor can maintain 57MB/sec in normal reading and 70MB/sec in sustained burst mode
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Postby TCAS on Wed Oct 29, 2003 2:22 am

Scour Wrote:

The most important things is that the CD-Rom and CD-writer are not connected on the same IDE-port.

If you read any CD-RW Manufacturer installation manual or instllation advisory, they all recommand that both CD-ROM and CD-RW drives can be installed at the same IDE Ctroller with CD-ROM as Primary and CD-RW as Secondry. You can even reverse the configuration backward.
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