ffutsnug said:
Hello, Do they still sell 34 pin IDE hard drives? or they
obsolete?
What is the state of the art in regular IDE hard drives? What is the
pin count
to connect to a motherboard?
TIA
34 pin is a floppy disk drive interface.
http://www.interfacebus.com/PC_Floppy_Drive_PinOut.html
SASI uses 34 pins, but I've never compared the pinout
on this to a floppy interface, to see if they're the same
thing. SASI disappeared some time ago. We used these
drives at work, a long time ago. The guy who sat next to
me at work, designed a controller to talk to one
of these. I worked on some other disk flavors part
time.
http://pinouts.ru/HD/co_ST506_pinout.shtml
*******
40 pins are used for desktop (3.5") IDE. Ribbon cables can use
40 wires or 80 wires with that. The 80 wire cable have
a ground on every second wire. The 80 wire cable
has better signal integrity and supports the higher data
rates as a result. But at each end, you only see the
40 pins.
44 pin interfaces are used on 2.5" laptop drives. The
extra four pins, when compared to a desktop 3.5" drive,
are used for power. The pin spacing is different on these
as well. One connector is 0.1" center to center, and
the other is 2mm center to center. Adapters are
available, to convert a 44 pin interface to a 40 pin interface
plus a power connector.
Laptop to desktop adapter plug
http://www.newegg.com/Product/Product.aspx?Item=N82E16812196219
SATA uses 15 pin power and 7 pin data. And the connectors
come in more than one size. The "micro" connector is not
too common, and I've never seen one in person.
HTH,
Paul
