Superspinning during bootup?
Problem: With 48bit patched version of HDAdvance my drive spins like crazy to the point of vibrating/shaking loudly! Sounds like a vaccuum cleaner.
Software: patched 48bit HDAdvance on CD (also happens with HDLoader)
Burned several different media brands. It will sometimes give a disc read error. When the drive eventually comes down to reasonable speed and Browser appears then the HDAdvance will sometimes boot.
Kicker: put original HDadvance CDR (non 48bit) and always always boots properly and quietly.