Re: Difference between IDE and SCSI ??

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Nigel Henry wrote:

Sorry for the delay in asking this, but what is the difference between using 40 pin 40 wire, and 40 pin 80 wire IDE cables?

I ask because on one of my machines I have a fixed harddrive, and also a harddrive caddy that uses one of the 5 ¼ slots, and is where I plug my various drives in, that have various multiboot installs on them. With a standard 80 wire ribbon cable it's impossible to connect both drives, so I used the end connector for the fixed data drive, and used an extension cable from the middle connector to reach the harddrive caddy. The only extension cables I could find were 40 wire ones. I started to notice that there were some bootup problems showing up, when booting some distros, so changed the cables over, so that the 80 wire end connection was now connected to the harddrive caddy that dealt with the OS's, and the 40 wire extension was connected to the fixed data drive.

This has resolved the bootup problems I was seeing.

As far as I understand this, an 80 wire cable with alternate wires grounded physically separates the wires carrying data, and results in a better data transfer to or from the harddrive. Please correct me if I'm wrong here.

That's correct - the extra wires are just grounds to prevent crosstalk at the speeds faster than the old 30Mhz speed that worked ok on 40 wires.

I've tried to find 80 wire extension cables without success. Anyone living in France know where I can find them?

No, but if you are looking to replace the setup, there are some nifty trayless SATA cages around that let you hot-swap bare drives.

--
  Les Mikesell
   lesmikesell@xxxxxxxxx


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