Windows 7 and Windows Server 2008 R2 can't recognize TSST TS-L633B and PLDS DS-8A3S DVD drives - Hotfix available

After you install or upgrade to Windows 7 or to Windows Server 2008 R2, the DVD drive on your computer is not recognized. This problem occurs because the SATA driver (Msahci.sys) implements new power management functionality that is known as Adaptive Link Power Management (ALPM). Some optical drives do not behave correctly with ALPM enabled, […]

After you install or upgrade to Windows 7 or to Windows Server 2008 R2, the DVD drive on your computer is not recognized. This problem occurs because the SATA driver (Msahci.sys) implements new power management functionality that is known as Adaptive Link Power Management (ALPM). Some optical drives do not behave correctly with ALPM enabled, and therefore these drives may not be recognized by the computer. The following is a list of some DVD drive models that are known to exhibit this problem: TSST TS-L633B, PLDS DS-8A3S. Microsoft is not offering an update for this issue, but customers affected by this specific problem can access and implement a hotfix via Microsoft Support, revealed Microsoft via KB976187.