Odd Lite-On 20A1P problem and Vista




I have had just swapped my LG Super-Multi drive for a Lite-On 20A1P drive that I have had knocking around since Christmas. I am running Vista and am now experiencing a strange problem.

The drive is recognised correctly by the BIOS and Vista, and I can see the drive both in device manager and explorer, but it doesn’t seem to want to read any pre-recorded disc’s - DVD’s CD’s, data or otherwise.

The disc is spun up and an attempt to read is made, but if I go into explorer to view, explorer just freezes. The disc continues to spin until I press the eject button, at which point explore will unfreeze.

However, blank disc (both CD’s and DVD’s) appear to be recognised and vista will pop up the standard “What do you want to do?” dialogue immediately.

I have updated the firmware to version KL0A with no difference. The drive appear to function correctly as I can boot from a bootable CD/DVD.

Anyone have any thoughts?



Some further points -

Get lot of these from the system log: -

Log Name: System
Source: cdrom
Date: 10/04/2007 12:29:04
Event ID: 11
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: Machine
The driver detected a controller error on \Device\CdRom0.
Event Xml:
<Event xmlns=“http://schemas.microsoft.com/win/2004/08/events/event”>
<Provider Name=“cdrom” />
<EventID Qualifiers=“49156”>11</EventID>
<TimeCreated SystemTime=“2007-04-10T11:29:04.831Z” />
<Security />

I tried to boot from the Vista CD and although the boot sequence started, as soon as Vista got to the graphical setup, it froze (for all intense and purposes). Same issues in safe mode.

I did notice that SOMETHING is happening. I inserted a disc with just a few files on it (3 or 4) and eventually an explorer window was displayed. However, this took a good few minutes to come up so it is impractical.


Ok, some more information.

I have now tested the CD drive when booting from the “UBCDWIN”, which starts and runs if a bit slowly and appears to show now error in the system log once you get into the Windows PE (BartPE) enviroment.

However, I also have a couple of installs of XP on this machine in different partitions. When I boot up into these systems and I put a CD/DVD into the drive, I see similar system event errors logged as with Vista, and I can’t read from the Drive.

I guess this is not just a Vista problem but more of a drive problem posibly in combination with my motherboard which is a DFI NF11 Ultra Infinity.

Has anyone seen this type of issue or could suggest a solution?


The first thing i would check is that UDMA mode is enabled in the BIOS. If it is, a 80 conductor IDE cable is required for this drive, check this and it may be worth replacing the IDE cable in any case. UDMA mode 4 is the correct mode for this drive.
Also check that the Master and Slave jumpers at the back of the drive are correctly set.
Also it’s wise to use standard MS IDE drivers in both Vista and XP.



Don’t you just hate it when you overlook the simplest of things, then you feel so stupid. I had looked at all the software setting in both the BIOS and Windows, jumper settings and driver setting. The one thing I overlooked was the inheritance of a 40 pin IDE cable that has been in this and other systems since the year dot.

This is the first drive I have come across that requires an 80 pin IDE cable to operate. Every day is a learning day!

Many thanks Dee-27 for pointing out my stupidity!