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| Re: UDMA mode 5 [message #274654 is a reply to message #274653] |
Mon, 01 December 2014 20:10   |
Bruce Johnson
Messages: 319
Registered: August 2012
Karma: 0
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Senior Member |
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On Dec 1, 2014, at 4:58 PM, Robert H. Baucom <rbtbcm@owc.net> 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'?
--
Bruce Johnson
"Wherever you go, there you are." B. Banzai, PhD
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| Re: UDMA mode 5 [message #274661 is a reply to message #274654] |
Mon, 01 December 2014 21:56 |
peterhaas
Messages: 80
Registered: September 2012
Karma: 0
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Member |
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> 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>
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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