On Wed, 2005-04-13 at 01:24 +0300, Kostas Sfakiotakis wrote:
Brian Gaynor wrote:
I have never personally seen problems with drives set to Cable Select on
a modern machine.
Could you please define the word modern in terms of technology and not years ?
What types of machines you consider modern ? i.e the 2 GHz+ ones ?
Many high-volume manufacturers (Dell and Compaq are
two I have personal experience with) have been shipping CS configured machines for 6 years or more.
Well being a home user entirely and not working with computers proffesionally
i think i only saw once a Compaq laptop otherwise i have never seen over
here a Dell/Compaq/IBM/HP machines so am tottaly unaware about what they
are doing and why the choose to do so .
If the drive marked as Cable Select or "CS" is together with a drive jumpered as Slave , then the IDE controller replaces the cable select with "Master" whereas
Brian, This is counter intuitive, and not always true. It depends upon where on the CS cable the cs drive is attached.
Hmmm , Brian was responding to a post of mine actually .
Over here i have two machines . One is a Pentium 166 MMX machine and
the other one is an AMD Athlon XP 2700+ . Both were build by combining
parts not as a computer of this or the other brand .
All i know is this . The 166 MMX CPU machine is using non UDMA
cabling and most probably non Cable Select cables .There i have both
hard disks configured with the old style by defining Master and Slave .
In the Athlon XP 2700+ i configured the drives as Master and Slave ( this one
has UDMA Cables , am unable to identify them as Cable Select ones or not ) because
that was the working recipe i knew .
Now i know for certain that my Western Digital Hard Disk was sent to me jumpered
as Cable Select . Now am tottaly unaware about the exact reason Western Digital
did that , am only certain that it did it .
IMO it would be preferable >not to use the Cable Select setting even when there is no ambiguity about what the drive realy is .
Cable select is exactly what it says, and is VERY reliable in my experience.
-Use a cable select cable -plug the drive to be used as master to the connection designated as master. -plug the drive to be used as slave to the connection designated as slave. -jumper both drives as cable select (CS)
With this config it does not matter if you have 2 drives or one, they will always be seen as master or slave depending upon where they are connected on the cable.
Of course there are a few (VERY FEW) drives that will have problems, but I think they are all also very old, and new drives will not have any problems being (single/master/slave) on the cable.
Please note that most new drive cables are UDMA and cable select as well. I can't remember when I last saw a new IDE cable that was not UDMA.
I may also note that the only time I have ever had a problem with IDE drives on a cable select cable has been when the user (customers of mine) chose to jumper the drives as master/slave and they were using a cable select cable.
Of course it happened as it was really supposed to happen . If the Master/Slave thing is defined by the Cable then it has to be that all the way. Cable select cable and cable select on the drives .
Other than that i have to thank Joel ( Posting of 13/04/2005 05:53 , possibly GMT+2 timing ) for the very usefull information on Pin 28 . I wasn't aware of such information . I bookmarked also the pcguide.com site .
Kind Regards, Kostas
