Hi Marc,

you’ve got answers on the SCSI ID jumper but one miss:

you cannot use two times the same SCSI ID; so before installing the new Hard Disk drive, run SCSIProbe and not the used SCSI IDs;
then you know the available IDs.


Also, internal drives have internal "chips" set and external have them removed (or was it the reverse ?) To be sure _and_ if you
have a genuine external Hard Disk drive, look at its logic board for those "chips"...


What are those things I call "chips" ? Simple, but I do not know the English name for that. Think it is internal "terminators". 


In fact calling the little SCSI block hardware "Terminator" is false ... this is an "impedence adaptator"... inside the piece of
hardware, they are “resistances”.


A little drawing of what I call "chips" above:

  -------------
  |           |
  -------------
  | | | | | | |  <-- this part is plugged in the Hard Disk drive logic board.

These were three of those in old Apple Hard Disk drives...


Again, you may reach better explanation on Quantum www site.


HTH,

Emile

________________________________________________________

Marc, il faut vérifier la présence ou l’absence d’adaptateurs d’impédence sur la carte logique du disque dur. Ils ont la forme
dessinée ci-dessus et sont au nombre de trois dans les disques dur utilisés par Apple il y a environ dix ans et plus. Ils sont
situés à l’extrémité de la carte logique près de la nappe SCSI. Pour les voir il faut probablement dévisser le support du disque.

Emile

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