Why does exporting a quicktime movie take so long?

I'm exporting an 88-minute-long HDV movie as a self-contained quicktime without recompressing. The media is all on one ESATA drive and the target disk is a second ESATA drive. It takes five hours and uses >150% of my CPU during the export. It seems to me like it shouldn't take nearly that long, nor should it use so much CPU since basically all it's doing is copying data from one disk to another, right? Any idea why it's taking so long and using so much CPU? Thanks.

No, wrong. It is creating a completely new GOP structure for your MPEG2 based edit.
Ah.
This is one of the drawbacks of working/delivering in HDV ... With that in mind, is there any special reason you are creating an HDV self contained master?
I'm making it self contained so I can put the whole thing on my MBP's internal hard drive and show it to people without having to carry terabytes of media around. I'm staying in HDV because I started out working in Final Cut Express, which converts everything to AIC, and had very bad results: my media files grew by a factor of three, everything was ridiculously slow, and my machine crashed regularly, particularly during captures, which was unbelievably frustrating because that meant I had to babysit the machine throughout the entire capture process (and often through multiple iterations of the capture process interleaved with machine reboots). In fact, the only reason I started using FCP instead of FCE is so I wouldn't have to transcode.

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