No, I haven't. I've just re-opened the player, and the 10gig works fine without the 48. the 48works fine without the 10 AND they work both fine together, OUTSIDE of the unit. Which does make me suspect more & more it's a heat issue. the fact that the player works fine otherwise is probably due to the fact that the drives are most of the time spun down while playing.

I will reassemble the player now and see if the error pops back up again. If it doesn then I'll perform a ramtest.

though I am now convinced it's a heat issue, I'm still puzzled as to why it worked for over 12hrs without a problem and then started to act up...

Update : I've been contacted by David from tech support who claims it's probably a faulty IDE cable. This is very well possible. He'll send me a new cable so I can solve this.
I'll get back to you guys with the result.

Riocar 58gig (48gig + 10gig IBM travelstar) S/N : 10101747 red