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From: pascor on 4 Sep 2009 13:38

HDDs that are 500GB and more tend not to fare well using "Molex-to-SATA"
power connector adapter cables. Even though the SATA-300 spec *claims*
that the orange 3.3V wire is not necessary you may find that these large
drives will not spin up or operate correctly in the long term. YMMV.

Many users of large drives report the "Click of Death" and assume that
the drive has failed. They should try throwing out any Molex power
cable adapters and use only native power supply SATA power cable which
always have orange 3.3V wires in them.


From: Paul on 5 Sep 2009 01:02
pascor wrote:
> HDDs that are 500GB and more tend not to fare well using "Molex-to-SATA"
> power connector adapter cables. Even though the SATA-300 spec *claims*
> that the orange 3.3V wire is not necessary you may find that these large
> drives will not spin up or operate correctly in the long term. YMMV.
>
> Many users of large drives report the "Click of Death" and assume that
> the drive has failed. They should try throwing out any Molex power
> cable adapters and use only native power supply SATA power cable which
> always have orange 3.3V wires in them.
>

You're responding to a post from Dec 2008.

To discover the power requirements for a drive, use the manufacturer's data.

http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=3698&p_created=#jumper

That 2TB drive uses 12V and 5V rails. There are no current requirements listed
for 3.3V.

For this drive, you can click "Specifications" and then download the product
manual. Again, consumption is quoted for 5V and 12V rails (PDF page 17).

http://www.seagate.com/ww/v/index.jsp?locale=en-US&name=st32000542as-bcuda-lp-sata-2tb-hd&vgnextoid=1f70e5daa90b0210VgnVCM1000001a48090aRCRD

The manufacturer may make it difficult, but if you have a look around
the web site, you can usually discover what voltages are needed.

Paul

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