Re: Sata cabling

007

Can I drag you back to the topic of the thread? What has been your
experience with regard to the reliability of the connectors / cabling?


--


Gerry
~~~~
FCA
Stourport, England
Enquire, plan and execute
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M.I.5¾ wrote:
"JS" <@> wrote in message
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JS
http://www.pagestart.com


"M.I.5¾" <no.one@xxxxxxxxxxxxxxxxxxxxxx> wrote in message
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"JS" <@> wrote in message
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Well you know the width of a SATA cable.
Serial data transfer right.

Take 4 SATA cables in parallel to a Hard Drive
that has four SATA connectors. What do you
have ... parallel data transfer (4 wide SATA).


Excellent idea. Call the individual paths 'express lanes'. You
could have (say) 16 of them paralleled up to give unprecidented
data transfer speed.

Hang on it's already been done.

Now the data xfer rate should be 4 times faster
than a single SATA cable and the cable width
would be no wider than a PATA cable.

Now I know this is a design stretch, but if you
have a hard drive with Integrated SATA Electronics,
how hard could it be to repeat the circuit design 3 more
times to get what I'll call a SATA IIx4 interface.


Not hard at all. Alternatively design the existing serial data
link to operate 4 times faster. Result: a cheaper drive as the
connectors are cheaper.

Commodore Computers were the first to realise this when they
converted the parallel IEE-488 interface which used a very
expensive connector into a serial interface which could use a
standard 'DIN' connector which cost just a few cents. It took them
several incarnations to get anywhere near the data rate though.

Problem is I doubt the current level of a Hard Drive's
mechanical rotation, read/write data rates and buffer
size would be able to feed a 4 wide SATA connection.


Well they are going for the 4 times faster option. SATA III is in
the pipeline (which means that SATA IV is in development). But you
are right, in that, the 6 Gb/s only represent a burst data rate
which is essentially the speed they can shift the on drive cache



IEEE-488 can be daisy chained or Star configuration.
In addition an IEEE-488 cable could be removed from
the hard drive in the middle of transferring a file and then
attached again and the file xfer would complete with no
data lost, this was possible over 25 years ago, try that
with SATA or PATA!


[Top posting corrected - AGAIN]

Although PATA is not hot puggable, SATA is. I haven't tried pulling
the plug in the middle of a transfer, but I can't think of anything
that would prevent the completion of the transfer.

The fact that I can't think of anything, don't make it so though.


.

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