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New HDD, has corrupted Data - AGAIN



 
 
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Old December 17th 17, 08:02 PM posted to microsoft.public.win98.gen_discussion,microsoft.public.windowsxp.general
Paul[_6_]
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Posts: 41
Default New HDD, has corrupted Data - AGAIN

J. P. Gilliver (John) wrote:

No, as the article explains, if you only have one drive, and it was
connected to the middle connector, you'd have an unterminated stub of
cable, which isn't good electrically (reflections and so on). Apparently
for the 40 as opposed to 80 cables that _was_ the case, as they just
left out line 28 to the second connector (i. e. master was on the middle
connector).


I like to draw pictures for people.

For a single IDE drive, it *always* goes on the end, like this.

Mobo
X --------------+--------+
| |
Master
Cable_Select (if 80 wire, CS is allowed)

When you add a second drive, it can be like this. Or,
you can run CS on both drives, if you are using an
80 wire cable (with that twist in it). I didn't want to junk
up the diagram, by adding CS to the table for both drives.

Mobo
X --------------+--------+
| |
Slave Master
Master with Slave (some brands have a
distinction on the jumpers)

Do *not* do this, as the end of the cable constitutes a
stub and causes excess reflections and corrupted data.

Mobo
X --------------+--------+
| |
Oopsy
ULooz

Even in the best of circumstances, the signals on that
cable look horrible. The signals look more horrible
in that last case.

One of the things that SATA does, is banish those bad
design ideas... to the pit. With point to point SATA,
there are no more simulation nightmares for engineers
to look at. Someone (of course) can still make a SATA
cable out-of-spec, but the field reports seem to be
pretty good. Almost as if most of the rolls of raw cables
come from one cable plant, and that helps keep the
process "honest".

You should not bend a SATA cable until it kinks, as
that causes unpredictable results to your data. You could
get away with it, or not. Don't crush the excess SATA
cable and tightly wrap duct tape around it. Bad. If you
have too much SATA cable, buy a shorter one from the
store and try again.

HTH,
Paul
 




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