[Duo2400] Re: Barracuda ST15150N

[Leonard T. Coco]

  The pin block you are referring to is to set SCSI ID (lower four pair 
- first pair for wide only) and upper 7 pair set  several drive 
parameters - parity, delay motor start, write protect, led,  etc. The 
"ribbon" cable was likely from the case it was originally mounted to set 
these functions. The six pin block sets termination - enables 
termination, ternmination power from drive, termination power to drive 
and bus, and termination to or from pin 26 dedending on how jumper(s) 
are set (defauft is 4&6 right most top pins - jumpered for termination 
power from drive.) the seagate website has complete diagrams.

Milton Lukins wrote:

>on 5/20/03 2:01 PM, Ivan Drucker at ivanxqz at yahoo.com wrote:
>
>  
>
>>I don't know what the ribbon cable you're referring to is, where is it
>>attached to the drive?
>>    
>>
>
>I was hoping the model number would tip you off as to exactly what I have.
>Just above where the four pin power connector goes and perpendicular to it
>along the edge of the drive is a double row of small pins (eleven high, 22
>pins total) to which is attached a ribbon cable about 3 inches long and a
>half inch wide.  Just to the left and perpendicular to that (like forming
>the number seven) are six pins (three vertical rows of two) with one jumper
>connecting two of the pins.
>  
>
>>If you use a newer (i.e. wide) drive, you may need a 68-pin to 50-pin
>>adapter, or an 80-pin to 50-pin adapter if it has an SCA connector. I
>>would avoid a drive with an SCA connector, since they just complicate
>>things.  (SCA drives integrate the 68-pin connector, the SCSI id pins, and
>>the power connector, into a single connector.) Newer narrow drives may
>>also require a 50-pin HD to 50-pin
>>IDC adapter if you plan to use them on the inside of an older Mac.
>>    
>>
>
>My local hard drive purveyor (MDB Wholesale Products-ebay store) seems to
>have drives ending in WC and 80 to 50 pin adapters.  Are these to be
>avoided?
>  
>
>>    
>>
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