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CRYMER
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Joined: Apr 07, 2004
Posts: 17
Location: Leeds, West Yorkshire, England.
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 Posted: Sat Apr 17, 2004 6:45 am Post subject: ATA33/66-Ulra DMA?? |
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H I
I a m n e w t o t h i s f o r u m an d I a m s t u d y in g f o r A + on t h e M C S E T r a c k .
I h a d a q u e s t i on on a m o c k t e s t r e c en t l y an d i t w a s a s k in g m e w h a t d i f f e r en c e s t h e r e w e r e on an A T A 3 3 t o A T A 6 6 c a b l e . T h e c h o i c e s w e r e
1 . M o r e P in s
2 . M o r e c a b l e s
3 . D M A
4 . B l u e S t r i p e d o wn t h e c a b l e .
I h a v e r e a d t h r o u g h t h e A + S y b e x b o o k , a s I c o u l dn ' t f o r t h e l i f e o f m e r e m e m b e r r e a d in g a b o u t t h i s . ( a l s o m a k in g m e t h in k t h e S Y B E X b o o k i s F $ % £ & in g r u b b i s h ) an d I a m s t i l l h a v in g t r o u b l e f in d in g o u t w h a t t h e r i g h t an s w e r i s .
F r o m m y o wn g u e s s w o r k I p i c k e d 1 & 2 . T h e r e a s on b i en g t h a t i t j u s t m a d e s en s e a s A T A 6 6 m u s t b e n e w e r t h an A T A 3 3 s o m u s t h a v e h i g h e r s p e c , w h i c h c o u l d p o s i b l y r e q u i r e m o r e c a b l e s . m o r e c a b l e s = m o r e p in s .
T h en I r e a d t h a t an A T A 6 6 c a b l e i s s t i l l a 4 0 p in c on n e c t o r ( b a c k w a r d s c o m p a t a b i l i t y w i t h A T A 3 3 b u t h a s 8 0 c a b l e s ? ?
S o t h i s m u s t m e an t h e an s w e r t o t h e q u e s t i on i s 1 & 3 a s N o . 4 t h e b l u e s t r i p e m u s t b e a l o a d o f c r a p . ( H a v e I j u s t an s w e r e d m y q u e s t i on )
M a b y e n o t b u t an y on e w h o kn o w s w o u l d m a k e m e a h a p p y A + s t u d y in g g i m p .
h a s an y on e e l s e t r i e d t o s t u d y f o r t h e A + w h en n o t r e a l l y w o r k in g in t h e f i e l d , w i t h o u t m a s s i v e P C s k i l l s . ( H o w d i d t h e y d o ? )
I w o r k in D T P s o h a v e a l o t o f e x p e r i en c e on M a c s an d n o t s o m u c h n e e d t o w o r k on P C s , s o s t u d y f o r t h e A + i s a c h a l l en g e a d i f f i c u l t t o g r a s p a t t i m e s .
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Dave
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| Posted: Sat Apr 17, 2004 11:13 am Post subject: |
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n o p e w on t b e m o r e p in s o r c a b l e s .
in f a c t , e v en w i t h u l t r a A T A 2 6 6 , t h e p in c o un t an d c a b l e s a r e t h e s a m e .
a c t u a l l y t h e an s w e r w o u l d b e t h e D M A i w o u l d t h in k . a l t h o u g h t h e t r u e c a p a b i l i t y i s d e t e r m in e d b y t h e c h i p s e t p r o g r a m m in g an d B I O S s e t t in g s .
a l l p a r a l l e l A T A s t an d a r d s w i l l s t i l l u s e t h e 4 0 p in f l a t r i b b on c a b l e . s o t h e d i f f e r en c e s w i l l b e d e t e r m in e d b y c h i p s e t a d v an c e s an d n o t h in g on t h e h a r d w a r e en d .
t h a t i s un t i l y o u r e a c h A T A 1 0 0 . ( o o p s , d i dn t r e a d a l l y o u r p o s t , o k t h en A T A 6 6 ) in o r d e r t o t r an s m i t p a r a l l e l s i gn a l s a t t h a t h i g h o f a r a t e , w e n e e d t o i s o l a t e t h e s i gn a l t o r e d u c e o u t s i d e in t e r f e r en c e . t o d o t h i s , t h e 8 0 W I R E c a b l e w a s in t r o d u c e d . n o w t h e r e i s s t i l l 4 0 p in s ( a c t u a l l y t h e r e i s on l y 3 9 p in s s in c e p in 1 9 w a s r e m o v e d f o r a l i gn m en t p u r p o s e s )
y o u s e e , w h en a s i gn a l t r a v e l s a l on g an y w i r e , t h e r e i s s o m e r e s i s t an c e . t h a t r e s i s t an c e c r e a t e s a m a gn e t i c f i e l d t h a t s u r r o un d s t h e w i r e . w h en t h i s o c c u r s an d t h e f i e l d i s l a r g e r t h an t h e w i r e , i t c r e a t e s d i s t o r t i on in s i gn a l s c r o s s in g i t s p a t h . t h e f a s t e r t h e s i gn a l t r a v e l s d o wn t h e w i r e t h e s t r on g e r t h e in t e r f e r en c e .
w h en t h e s i gn a l s p e e d o f h a r d d r i v e s a p p r o a c h e d 1 0 0 M b / s , t h e s t r en g t h o f t h e d i s t o r t i on s t a r t e d c o r r u p t in g d a t a f o r c in g t h e i m f o r m a t i on t o b e r e s en t r e s u l t in g in l o s in g m o s t o f t h e s p e e d a d v an t a g e .
s o t h e 8 0 w i r e c a b l e w a s in t r o d u c e d w i t h a l t e rn a t in g c on n e c t in g w i r e s . E v e r y o t h e r w i r e w a s n o t c on n e c t e d t o an y t h in g . b u t t h e un c on n e c t e d w i r e a c t s a s a c o l l e c t i on p o in t f o r t h e in t e r f e r in g m a gn e t i c f i e l d . t h i s en a b l e s s i gn a l s t o t r a v e l a t m u c h g r e a t e r s p e e d en a b l in g t h e b l in d in g f a s t t r an s f e r s p e e d s o f t o d a y s h a r d d r i v e s .
R e c en t l y , h a r d d r i v e m an u f a c t u r e r s t o o k a p a g e f r o m t h e F i r e w i r e s t an d a r d an d s t a r t e d u s in g S e r i a l A T A t r an s f e r m e t h o d . L i k e F i r e w i r e , in f o r m a t i on i s t r an s m i t t e d s e r i a l l y o r on e b i t a t a t i m e in s t e a d o f l i k e p a r a l l e l A T A w h i c h t r an s m i t s 8 o r 1 6 b i t s a t a t i m e .
T h e S e r i a l A T A ( S A T A ) in t e r f a c e i s a 7 p in c on n e c t o r . a l t h o u g h t h e r e a r e l e s s s i gn a l s g o in g a t on e t i m e , b e c a u s e in t e r f e r en c e o r C R O S S T A L K i s n o l on g e r a m a j o r c on c e rn , H U G E in c r e a s e s in s p e e d a r e p o s s i b l e .
T h e r e a r e o t h e r a d v an t a g e s t o S A T A h a r d d r i v e s t o o . In s t e a d o f u s in g t h a t b i g w i d e f l a t c a b l e , S A T A c a b l e s a r e r o un d an d v e r y s m a l l en a b l in g e a s i e r r o u t in g o f t h e c a b l e in m u c h s m a l l e r s p a c e s . A l s o , w i t h t h e n e w e r P en t i u m 4 ' s an d t h e i r c r i t i c a l c o o l in g r e q u i r e m en t s , d e s i gn e r s h a v e f o un d r o u t in g t h e l a r g e r 4 0 p in c a b l e s d i f f i c u l t . f r e q u en t l y t h e c a b l e s a r e b l o c k in g d i r e c t a i r c i r c u l a t i on on t o t h e p r o c e s s o r . S A T A c a b l e s d o n o t h a v e t h a t p r o b l e m .
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CRYMER
Ensign
Joined: Apr 07, 2004
Posts: 17
Location: Leeds, West Yorkshire, England.
Status: Offline
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| Posted: Mon Apr 19, 2004 2:39 am Post subject: |
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T h an k s f o r t h e r e p l i e s . 
S o m e f o o d f o r t h o u g h t f o r m e an d m a y b e I ' l l h a v e t o b u y a n e w s t u d y g u i d e .
I a l s o h a v e an o l d w in 3 . 1 m a c h in e w h i c h I p l an t o d i s e m b o w e l in t h e n o t t o o d i s t an t f u t u r e . J u s t t o l e l a rn a b o u t t h e l e g a c y s t u f f t h a t I w i l l h o p e f u l l y n o t h a v e t o d e a l w i t h .
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Dave
Moderator
Joined: Apr 07, 2004
Posts: 311
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| Posted: Mon Apr 19, 2004 12:50 pm Post subject: |
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g r e a t i d e a ! !
t e a r in g a p a r t a w o r k in g c o m p u t e r ( y e a i t s g o t t a w o r k o t h e r w i s e i t a in t g on n a h e l p y a ) t h en p u t t in g i t b a c k t o g e t h e r w i l l g i v e y o u in v a l u a b l e e x p e r i en c e . ( t h e r e a s on w h y i t n e e d s t o w o r k i s t h a t y o u c an t t e s t y o u r r e a s s e m b l y s k i l l s i f y o u c an t t u rn i t on t o v e r i f y y o u d i d a g o o d j o b ! )
t h e s y s t e m i s o l d , b u t y o u d on t r e a l l y w an t t o u s e y o u r g o o d c o m p u t e r f o r y o u r f i r s t t r y d o y o u ? ? i d on t b l a m e y a . . .
b u t t h e r e a r e s t i l l m an y t h in g s t h a t a r e t h e s a m e , an d m o s t o f a l l , i t g i v e s y o u t h e c h an c e t o p r a c t i c e t h e s k i l l s an d t e c hn i q u e s y o u w i l l n e e d n o m a t t e r w h a t y o u a r e d o in g .
a l l c o m p u t e r s c an b e t a k en a p a r t an d a l l c an b e r e a s s e m b l e d , n o m a t t e r h o w o l d t h e y a r e . an d b e l i e v e m e , i f y o u m a k e a m i s t a k e , i t w on t m a t t e r i f i t s a 3 8 6 o r a b r an k s p an k in g n e w P - 4 , i t p r o b a b l y s t i l l w on t w o r k ! !
t e a r i t a p a r t t h e f i r s t t i m e an d w r i t e d o wn w h e r e e v e r y t h in g w a s c on n e c t e d an d w h e r e t h e j u m p e r s a r e e t c .
p a y a t t en t i on t o t h e l a b e l in g on t h e M B a l s o . t h en k e e p d o in g i t un t i l y o u n o l on g e r n e e d t o l o o k a t t h e p a p e r . t h en a f t e r y o u h a v e t o rn a p a r t a f e w d i f f e r en t c o m p u t e r s y o u w i l l s t a r t t o n o t i c e a p a t t e rn o f a s s e m b l y .
t h in g s l i k e p in 1 on m o s t m o t h e r b o a r d s a r e o r i en t e d t h e s a m e w a y . a l s o p in 1 a l s o h a s a s q u a r e s o l d e r a s o p p o s e d t o t h e r o un d s o l d e r s o f a l l t h e o t h e r p in s .
t r u s t m e , in t h i s c a s e , p r a c t i c e d o e s m a k e p e r f e c t . s o on y o u w i l l h a v e t o c on f i d en c e t o t e a r a p a r t y o u r g o o d c o m p u t e r . i t h in k y o u w i l l f in d t h a t a f t e r y o u l e a rn h o w t o d o i t an d b e c o m e c on f i d en t in d o in g i t , i f y o u a r e l i k e t h e r e s t o f u s , y o u w i l l f in d s o m e e x c u s e t o t e a r y o u r g o o d c o m p u t e r a p a r t t o a d d s o m e t h in g , c l e an s o m e t h in g , o r j u s t t o l o o k a r o un d .
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Derek
Lieutenant
Joined: Apr 06, 2004
Posts: 50
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| Posted: Mon Apr 19, 2004 6:56 pm Post subject: |
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| Q u o t e : | | h a s an y on e e l s e t r i e d t o s t u d y f o r t h e A + w h en n o t r e a l l y w o r k in g in t h e f i e l d , w i t h o u t m a s s i v e P C s k i l l s . |
M e t o o . I m e s s e d w i t h c o m p u t e r s a l i t t l e w h en I w a s y o un g e r . I h a d a b o u t a 1 5 y e a r h i a t u s f r o m c o m p u t e r s un t i l a b o u t 3 y e a r s a g o . B a s i c a l l y I w o u l d b e t h e t y p e o f p e r s on t h a t i s t r y in g t o en t i r e t h e I T f i e l d f r o m a t r u c k d r i v in g b a c k g r o un d ( t h o u g h I ' m r e a l l y an u p h o l s t e r e r in a f u rn i t u r e f a c t o r y an d a c l o s e t n e r d ) .
On e t h in g t h a t m i g h t h e l p y o u i s t o o b t a in t h e d i f f e r en t W in d o w s o p e r a t in g s y s t e m s an d l o a d t h e m on a s e p a r a t e h a r d d r i v e . E b a y i s kn o wn f o r h a v in g un o p en O S ' s b u t y o u s h o u l d d e f in i t e l y c h e c k o u t t h e s e l l e r ' s r a t in g . Y o u w i l l a l s o b e a b l e t o p r a c t i c e p a r t i t i on in g an d f o r m a t t in g h a r d d r i v e s . H an d s on e x p e r i en c e i s p r o b a b l y g o in g t o h e l p u s r e m e m b e r t h i s s t u f f m o r e t h an an y t h in g .
I m y s e l f a m p l an n in g on b u i l d in g a c o m p u t e r t h i s w in t e r . B u y in g an o l d c o m p u t e r an d m e s s in g w i t h i t w o u l d p r o b a b l y b e j u s t a s g o o d . F r o m a l l t h e b o o k s an d o t h e r A + m e d i a i t s e e m s t h e r e a r e s t i l l a l o t o f e x a m q u e s t i on s on o l d e r h a r d w a r e an d o p e r a t in g s y s t e m s .
D e r e k
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CRYMER
Ensign
Joined: Apr 07, 2004
Posts: 17
Location: Leeds, West Yorkshire, England.
Status: Offline
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| Posted: Tue Apr 20, 2004 5:37 am Post subject: |
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T h an k f o r t h e e c o u r a g e m en t t h in k I ' l l t a k e t h e m a c h in e h o m e t on i g h t . . .
I w o u l d l i k e t o g e t h o l d o f s o m e d i f e r en t O S ' s t h a t m a y b e s o m e t h in g e l s e I s h o u l d l o o k a t .
T h an k s A g a in . . .
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