I've started a new thread (old thread click here) as my question has changed a little.
I have just installed a new Western Digital 250GB HDD. The new drive is set as master while my old 80GB Samsung SV8004H is set as slave. My old 80GB drive was partitioned in roughly 2 equal sizes a couple of years ago using Acronis TrueImage Deluxe. For some reason my PC is only showing this drive now as only 31.4GB. Even in the BIOS it only shows as 33822MB, although if I revert the old drive back to master the BIOS shows the correct size (80GB)
Also - you could try both drives on Cable Select - if you do that, change the jumpers on both of them, and ensure the drive you want as Master is at the END of the cable, and the Slave on the MIDDLE connector.
In this mode it's the position on the cable that determines whether they're Master or Slave - not the jumpers.
Probably its because its hidden. If you have left the Operating system on the old 80GB drive and not reformatted the drive then windows will hide this primary partition on the slave. As you stated that the drive was originally partitioned into two partitions then this is the likely problem. If you reformat the slave 80GB drive then it should show as normal.
OK guys, I am assuming the grovelling position ie. Down on my knees, hands clasped tightly in front of me, begging forgiveness.
I've had a play with the jumpers, every possible combination, and now... eureka! I have a fully working 80GB spare drive, which I have partitioned and formatted.
The 2 jumpers have to be set horizontally in line. In my defence, nowhere on the Samsung site does it show this setting. On the drive case there is a tiny jumper diagram, which, even with a magnifying glass is so faint it can't be read.