Re: UDMA mode 5

[peterhaas]

> The drives should work just fine, although they'll be limited to the
> throughput of the ATA adapter on the motherboard, which, iirc is ATA-100
> not 133, which is what the UDMA spec is talking about:
> 

The interface was carefully designed so that any drive which is connected
using 40-pin/40-wire cables is limited to 33 MB/sec (16.67 MB/sec on
Beiges) and any drive which is connected using 40-pin/80-wire cables is
limited to 133 MB/sec, with 66, 100 or 133 being possibilities, depending
upon the lowest performance interface (host or drive).



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Re: UDMA mode 5

[Bruce Johnson]

On Dec 1, 2014, at 4:58 PM, Robert H. Baucom  wrote:

> The HDD’s in my Quicksilver G4 are acting crazy. I have two new 
> MAXTOR  ATA HDD
> 160GB PATA 133 HDD 
> MODEL: 6L 160PS 
> SER# L30H7CVH
> 
> But reading a Hard Drive installation Paper it says: For your drive to run in 
> this mode, you need the following:
> • A computer that supports UDMA mode 5
> 
> Will my G4 with an Apple 933GHz board and running Leopard 10.5.8 run UDMA 
> MODE 5?

The drives should work just fine, although they'll be limited to the throughput 
of the ATA adapter on the motherboard, which, iirc is ATA-100 not 133, which is 
what the UDMA spec is talking about: <http://en.wikipedia.org/wiki/UDMA>

What do you mean 'acting crazy'?


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Bruce Johnson

"Wherever you go, there you are." B. Banzai, PhD

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UDMA mode 5

[Robert H. Baucom]

The HDD’s in my Quicksilver G4 are acting crazy. I have two new 
MAXTOR  ATA HDD
160GB PATA 133 HDD 
MODEL: 6L 160PS 
SER# L30H7CVH

But reading a Hard Drive installation Paper it says: For your drive to run in 
this mode, you need the following:
• A computer that supports UDMA mode 5

Will my G4 with an Apple 933GHz board and running Leopard 10.5.8 run UDMA MODE 
5?

RHB

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