Who knows, the quantum in my LC II worked last time I tried. I suspect it got light use, but only time will tell when it will fail. As for modern hard drives I'd be inclined to stick to western digital (wd), especially since my web server is running on an old 9GB Western Digital drive. I half-expect it to die any time now, but it's been working fine for the last 10 years maybe and before that it was in the family computer for probably a couple years.