(Since this is a lot of questions, even tho they're probably easy for you guys, I'll make this post worth 250 pts. There are links to pics for all this below.)
I'm trying to connect a Fujitsu model mhv2080ah laptop EIDE HDD to my regular desktop PC's PATA hard drive data connectors. I didn't know laptop hdd's have different connectors. When I saw the difference I bought a '2.5" to 3.5" HDD adapter'. But when I tried to plug it in I saw there was an even smaller PREVIOUS adapter stuck on the connector of the laptop HD, that let it connect to the laptop. Let's call this PREVIOUS adapter the "mystery adapter", and my newer adapter a '2.5 to 3.5' adapter.
(1) Can you look at the picture (link below) of the "mystery adapter" and tell me what kind of connector the male end is called? And confirm that the female end is a '2.5" HD female connector'?
(2) Am I correct in assuming that most EIDE PATA hard drives for laptops are called '2.5" connectors' as opposed to the regular desktop HD connectors that are called 3.5"s?
(3) Does this '3.5" vs 2.5" HD' distinction apply for SATA drives as well?
(4) Most 80-pin eide / pata cables have one of the middle holes plugged. But the "2.5 to 3.5" adapter I bought does not have the missing pin. So the 3.5" male end can't work with most EIDE / PATA cables. (It needs all holes free, unplugged). Did I buy the wrong adapter?
(5) I eventually found an 80-pin EIDE PATA cable that had connectors at each end that had no plugged holes. I was able use it with the adapter + laptop HDD. (including 2 pins for power, leading to the PATA power dongle). See pic below, "3.5-to-2.5-hdd-pluggedin.
jpg") However, this setup didn't work. Any ideas why the desktop PC didn't detect the 2.5" drive? Do I need a special motherboard?
(6) I will assume that the picture called "naked 2.5-HDD-connector.jpg" shows a "2.5" male connector. When I slap the 2.5 to 3.5 converter onto this, there are approx 4 pins unused. What are they for?
Links to pictures: