If you think about what's acutally going on in the guts of your computer, this makes sense.
First, the processor has to grab your data from your original Hard drive, then it has to process what to do with it, then it has to write it to your second hard drive. When transferring a small file (1MB or so) this doesn't take too long, but when you start getting into larger files it's going to take longer.
180MB still shouldn't take that long if you have your IDE cables set up to optomize data transfer. You should have 1 HD on each IDE cable, this way the processor can read from the first IDE channel and write to the 2nd one.
Give that a shot.
Its a frigging Laptop, not a Labtop!!!!