From: Baldwin_James at domain emc.com
Date: Fri 22 Jun 2001 - 10:51:52 IST
Darragh, yer right :)
The cable is 80-Way, not 80-Pin...the extra 40 wires are grounded to -5V pin
improve signal attenuation and create a magnetic shield from interference
between each 'active' wire.
But, don't bother buying a 40-Way cable as the 80-way are
You dont need to make any changes in your BIOS, as the chipset will negoiate
the proper DMA speed-setting, just make sure U/DMA 33 is set on in your BIOS
and not PIO Mode/4. All ATA-66/ATA-100 drives are backward compatible to
CS is Cable Select, if the HD is the only IDE device on that cable, then it
will default to master..in any case, if it is on the primary IDE channel and
is the only HD on that cable, it will be detected as /dev/hda for linux
From: lbedford at domain lbedford.org [mailto:lbedford at domain lbedford.org]
Sent: Thursday, June 21, 2001 10:50 PM
To: ilug at domain linux.ie
Subject: Re: [ILUG] Ultra DMA
On Thu, Jun 21, 2001 at 10:06:15PM +0100, Darragh Rogan came forth with:
> You're right - tis a 440BX Intel Motherboard - ultra dma 33 - is that 33
> a second? I'm currently looking at getting a new hd in eager anticipation
> dsl, and I don't think the maxtor 30 gigi yke on dabs is capable of much
> more than that!
> Where do I get the 80 pin cable - read up on maxtors site last night - the
> extra 40 are grounding or something.
any hardware shop will sell them.. I've seen them in ITDirect for definite..
you don't need it for UDMA 33 though, only for 66+
> Also, where do I change the setting for ultra dma - I know that I've to
> the HDs to CS, but do I have to play with BIOS?
The BIOS probably sets it up okay, you can run hdparm with the arguments
gave to make it happier...
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