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Windows 7: DVD Drive disappeared - Windows 7 64bit

05 Sep 2010   #11
madcat75

windows 7
 
 

I have this exact same problem! I dunno wtf is going on!


My System SpecsSystem Spec
.
30 Dec 2010   #12
soulrebel

Windows 7 Ultimate x64
 
 
Dvd drive [acer tsst ts-l633b] disappears in windows 7 explorer

Check out my post [soulrebel]: Acer Aspire 4736..it didnt detect DVD-RW driver on 7?

ACER TSST TS-L633B
I had the same problem with an ACER TSST TS-L633B DVD+/-RW [SAMSUNG] which took me months to find the answer.

PROBLEMS
- Drive disappears in Windows Explorer;
- Drive reappears when tray opens or closes;
- Have to reboot computer to see drive.

CAUSE
This problem occurs because the SATA driver (Msahci.sys) implements new power management functionality that is known as Adaptive Link Power Management (ALPM). ALPM is a feature that puts a hardware device into sleep state after 100 ms of idle time. This is a power-saving feature. Some optical drives do not behave correctly with ALPM enabled, and therefore these drives may not be recognised by the computer. The following is a list of some DVD drive models that are known to exhibit this problem:

TSST TS-L633B DVD+/-RW [SAMSUNG]
SONY BC-5100S DVD
SONY BC-5600S DVD
PLDS DS-8A3S [DELL]


FIXES
METHOD 1. Update the DVD firmware;
METHOD 2. Manually turn off ALPM.
My System SpecsSystem Spec
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 DVD Drive disappeared - Windows 7 64bit




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