Tom Uban wrote:
  The mac powerbook 150 used a 2.5" IDE drive. It
was low cost 68030
 machine, circa 1994.
    
Yeah, the 150 was one of the 1st to use IDE.  The earlier ones used SCSI
2.5" drives from what I recall.  I'm not certain which the first model
was that used IDE.  Very difficult to obtain these days.  Very few
machines used SCSI 2.5" drives, but of those I know that SPARCbooks did.
There are a few SCSI to IDE bridges for low profile 2.5" drives that
hook on to the IDE drives and have a SCSI interface.  Those are lots of
fun. :-)
What I really miss is the Duo's and the DuoDock's.  I wish modern
notebooks supported something like that as cleanly.  IMHO, that was a
brilliant idea.  I still have my Duo230 somewhere in a closet + the
parts of the dock, but it's poor keyboard got sticky and no longer
works.  Was a nice little machine back in the day.