Why is my CD-Rom crazy slow?!?!

[imported_wazoo]

Ok... I'm stumped on this one.

I've got a Toshiba DVD-Rom drive that, when working correctly, Sandra shows at 22x.

For some unknown reason, however, it suddenly goes REAL slow and when I test it, comes out at 4x CD-Rom speed.

I checked the IDE channel (it is on the primary) and it shows it is using Ultra DMA Mode 2.

Nothing else is on the channel with the drive (I have two other devices on the secondary and one SATA drive).

I can't figure out why this is happening.


TIA,

Wazoo

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Athlon64 FX-53
ASUS A8V w/ Bios 1005 Beta 21
Raptor 74gig 10k SATA HD
Gainward 6800 Ultra 256mb
Audigy 2 ZS
1gb Corsair Twinx1024 3200XLPro 2-2-2-5
Koolance PC2-650 Watercooled case (CPU & GPU)
Sony 24" W900 CRT
Win XP Pro SP1

 

[Thegonagle]

Are you running the test on a full CD (650-700 MB), or a partially full one? A CD is only read at maximum speed at the outer edge of the disc. (CDs are read from center to edge.)

Also, most CD/DVD readers/writers back off on the speed if it detects that the disc is off balance.

Try running the test with different CDs (both pressed and burned). You'll see varied results depending on the test disc.

 

[Abhi]

Delete the ide channel and disk drive from the devic manager and let windows re install it ... It might help.