IDE disk problem
Jeff Vian
jvian10 at charter.net
Wed Apr 13 00:06:50 UTC 2005
On Wed, 2005-04-13 at 01:24 +0300, Kostas Sfakiotakis wrote:
> Brian Gaynor wrote:
> > On Mon, 2005-04-11 at 16:36 -0700, Rick Stevens wrote:
> >
> >
> >>Personally, I NEVER TRUST THE "CS" SETTING! It is totally unreliable.
> >>Jumper one drive as "MA" (ideally, the one you're using now) and the
> >>other as "SL" and you should be fine.
> >
One persons opinion, but not true across the board. Otherwise why would
ALL new systems and drives be delivered as CS.?
> >
> > I have never personally seen problems with drives set to Cable Select on
> > a modern machine. 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.
>
> 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.
> if the drive marked as Cable Select is together with another one marked
> as Master
> then the Cable Select is considered as "Slave" . Special Care is needed
> in case
> the Cable Select is alone . At that point am not certain that the
> Controller can replace
> the Cable Select setting with "Single".
It does that flawlessly for me, and I have never had a problem since I
began using exclusively CS jumpering on the drive and a cable select
cable.
> I know for certain that my 160
> GB Western Digital
> hard disk has different jumper positions if it alone "Master w/o Slave"
> or Master if a slave
> disk is present . By the way this very disk ( 160 GB WD ) was originally
> shipped to me as
> Cable Select , probably because the shop didn't new my hard disk
> configuration and
> so it had the most "compatible" position .
Default jumpering from all manufacturers I have used in the last 5
years, since all new systems being built use the cable select cable.
> 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. They got intermittent errors due to the jumpering
conflicts. The permanent fix ---- rejumper the drive to CS.
(Really easy to fix.)
> Kind Regards,
> Kostas
>
>
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