The ECS P6STP-FL motherboard uses IDE (PATA) harddrives, and optical drives. (CD/DVD drive)
IDE 1 is for the Harddrive.
IDE 1 is the 40-pin connector that is closest to the Ram Memory slots.
(Only 39-pin are used, however)
IDE 2 is used for the optical drive/s.
IDE 2 is next to IDE 1, and is further away from the Ram Memory slots.
The IDE connectors on the motherboard, have a Cut-Out on one side. A small square cut-out.
This is for the Locating Lug, on the flat IDE ribbon cable's, connector.
This makes sure that Pin 1 in the motherboard connector, is lined up with Wire 1 in the flat IDE ribbon cable.http://en.wikipedia.org/wiki/File:PATA-cable.jpg
The Locating Lug shown in this example, is two 'ridges' that are separated. Some designs just use one solid block.
IF, there is no Locating Lug;
Look for the faint Red stripe, on the side of the flat IDE ribbon cable,http://en.wikipedia.org/wiki/File:Nappe.svg
This stripe denotes the side, that number 1 wire is on.
Motherboard installed in computer case, the red stripe on that flat IDE ribbon cable, goes DOWN.
Down towards the Bottom of the motherboard.
When connecting to the Harddrive, and there is no Locating Lug on flat IDE ribbon cable, the Red stripe goes towards the power cable connection.
This applies to the optical drive (CD/DVD drive), and Floppy Disk Drive.
(34-pins for a Floppy Disk Drive. Cable is smaller in width)
Now, there is a different method of connecting a Harddrive, or optical drive, in relation to the flat IDE ribbon cable.
Depends on if the flat IDE ribbon cable is a 40-wire cable, or an 80-wire cable. You can use Cable Select setting on Harddrive/Optical drive; OR you can just connect the Harddrive, or Optical drive the correct way,http://mikeshardware.com/howtos/howto_connect_ide_hd.html
Is the Harddrive recognized in BIOS Setup?
If your question relates that the Harddrive is not recognized, post back in a Comment.
Also post the manufacturer ID information off of the Harddrive's label.
Example for one type of Western Digital harddrive;
Western Digital 80 GB harddrive, and IDE (PATA)
With this information I can find the Cylinders, Heads, and Sectors.
Then guide you in entering it in BIOS Setup, IF needed.
"Press DEL to run Setup"
Press the Delete key to enter BIOS Setup.
AS SOON AS you press the Power On button, start tapping on the DELete key.
Tap in 2 second intervals.
You will hear beeps. These are Stuck Key Error Code beeps, and it is YOU that is doing it. Ignore the beeps.
Best method for entering BIO Setup.
(The window of opportunity for entering BIOS Setup, goes by F-A-S-T! The above method will get you in)
Your problem statement leaves a hole in the time/space continuum.
Does not exactly state what your problem is
For additional questions please post in a Comment.