(Additionally I first reported this issue running the same HD in a Dell XPS M1330 ; I then replaced my computer but just dropped my existing Samsung HD in my new Toshiba machine. Although the Toshiba BIOS behaves completely differently from the Dell one [read : not as well] and especially on power management issues, however the HD behaviour, withe respect to hdparm -B, has remained exactly the same.)
(Additionally I first reported this issue running the same HD in a Dell XPS M1330 ; I then replaced my computer but just dropped my existing Samsung HD in my new Toshiba machine. Although the Toshiba BIOS behaves completely differently from the Dell one [read : not as well] and especially on power management issues, however the HD behaviour, withe respect to hdparm -B, has remained exactly the same.)