Problem: USB hard dks disconnect

[mp3ireland2]

Hi,
I am running alhpa 5 and have a usb hub (Model: HCO-32). At random times during a film it will say "Unsafe device removal" and the hard disk then unmounts and remounts. When it remounts then it always is mapped to a dferent usn port (initally 0, then 1, then 2 if it keeps happeinig). I think this just started happening in alpha 5 as I don't remeber it before ( I cam from alpha 1 or 2 up to 5 a couple of weeks back). Happens with two different hard drives, so not a hard drive issue.

Should this usb hub be able to power two hard drives? I have 2 1tb portable drives but when both are plugged in, most of the time only one of them will work.

Thanks,
Chris