I've been attempting to upgrade from D6 to D7 for over a year. I keep getting closer. I thought in January I was actually going to be able to pull it off, but I keep finding these... things... that get in my way.
One of the latest and more serious ones is that my images disappear AFTER I convert them from the D6 field types to the D7 field types. Was wondering if any of you have run across this.
Here's what happens:
1. I take my d6 installation on my test site, disable all the plugins, switch to d7 and upgrade the d6 database.
2. The upgrade process takes a long time, but it works without any reported errors.
3. At this point, the images on my site (which used a cck-provided field) don't display because that field type isn't a proper d7 field type.
4. No worries, D7 provides a tool that lets you do the conversions! So I run the tool, select all the unconverted d6 field types and convert them to d7. The process reports no errors whatsoever.
5. Huzzah! I have images in my content again.
6. Now I go about enabling all the D7 equivalents of the D6 plugins I used. I successfully enable them.
7. Huzzah! I now have all my plugins. And the images are still there.