Looks like it's a 2.5" IDE drive inside. Before I splurge on a new one (which probably won't have an OS) does anyone local have a spare I can try, and the ability to put something like Ubuntu on it?
And within minutes I found the boot menu (it's F8 I think, I tried pressing the function keys wildly during bootup), and it's starting up Ubuntu from a memory stick.
Works but doesn't seem to be able to use the WIFI, presumably because it isn't installed properly. I think this gives me confidence to buy a drive. Shouldn't be too expensive, I hope.
later still Actually it appears to be a 1.8" IDE ZIF fitting drive. Not good news, they're obsolete and expensive, and ZIF makes the choice very limited.
however it looks like I can get a 1.8" CF card adapter for