Poor Performance Reading Video CD in IDE CD-ROM Drive (149564)
The information in this article applies to:
This article was previously published under Q149564 SYMPTOMS
Data transfer can occur very slowly when you are reading a video CD in an
IDE CD-ROM drive if the following conditions are true:
- The IDE CD-ROM drive is configured as the slave device on an IDE
channel, with another device (such as a hard disk) configured
as the master device on the chain.
- You are using protected-mode drivers to access the IDE devices,
including the CD-ROM drive.
For example, playing an MPEG file from a video CD can cause the computer
to seem to stop responding (hang) due to the very slow rate at which data
is being read from the CD.
CAUSE
There is a problem in the Ios.vxd file that causes excessive seeks on data
requests from the CD-ROM drive under these conditions. This results in
degradation in the rate of data transfer from the drive.
RESOLUTION
Microsoft has released an updated version of the Ios.vxd file that
corrects this problem. The file is:
IOS.VXD version 4.00.953 (3/19/96, 68,825 bytes) and later
To install the updated Ios.vxd file, follow these steps:
- Download the IOSUPD.EXE file from one of the online services listed
below to an empty folder.
- In My Computer or Windows Explorer, double-click the IOSUPD.EXE file
you downloaded in step 1.
- Follow the instructions on your screen.
The following file is available for download from the Microsoft Download Center:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
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| Modification Type: | Minor | Last Reviewed: | 9/23/2005 |
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| Keywords: | kbHotfixServer kbQFE kbdownload kbDiskMemory kbfile kbgraphxlinkcritical KB149564 |
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