In a message dated 8/6/03 9:39:58 AM, [EMAIL PROTECTED] writes:

<<
The PS connects to the HD via a standard 4 pin power cable and the ribbon 
cable plugs into the HD.
>>

With the exception of SCSI Zips, and drives which are powered through the 
data cable (Mac floppies, and SCA drives), all drives utilize the same AMP 
Mate-N-Lock 4-pin connector for power.

Pin 1 = +12 volts, Pin 2 = +12 volts return, Pin 3 = +5 volts return, and Pin 
4 = +5 volts.

CDs and DVDs, and especially CD-Rs and DVD-Rs, require a lot more power than 
does a modern hard disk.

35 watts should be sufficient.

An older hard drive will require about 35 watts once the spindle motor has 
accelerated, but will require about twice that power for the first several 
seconds.

Which is why some drives cannot be started successfully, even though the 
power supply appears to be sufficient for the drive's power requirements.

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