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Computer with Ultra DMA IDE Controller May Hang
Article ID: 171353 - View products that this article applies to.
This article was previously published under Q171353
When you are running Windows 95 on a computer with an IDE (ATA) hard disk and controller that support Ultra DMA mode, the computer may stop responding (hang) while the hard disk is being accessed.
This problem can occur if there is a hardware error while data is being read from the hard disk. When such an error occurs in Ultra DMA mode, the Windows device driver does not successfully recover from the error and retry the operation.
Microsoft has confirmed this to be a problem in Microsoft Windows 95 OEM Service Release 2 (OSR2). An update to address this problem is now available, but is not fully regression-tested and should be applied only to computers experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft does not recommend implementing this update at this time.
This issue is resolved by the following updated file for Windows 95 OSR2:
To install this update, follow these steps:
Esdi_506.pdr version 4.00.1116 (dated 8/25/97) and later
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
Download Remideup.exe now
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119591Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
(http://support.microsoft.com/kb/119591/EN-US/ )How to Obtain Microsoft Support Files from Online Services
The following files are installed by Remideup.exe:
NOTE: The Voltrack.vxd file is installed on Windows 95 computers only. This file is not installed on computers running OSR2.
File name Version Date/Time Size Destination folder ------------------------------------------------------------------------ Esdi_506.pdr 4.00.1116 8/25/97 11:16a 24,426 Windows\System\Iosubsys Voltrack.vxd 4.00.954 3/6/96 9:54a 18,518 Windows\System\Iosubsys
Ultra DMA, also known as Ultra DMA/33, is an extension of the ATA hard disk interface that allows burst data transfer rates of 33.3 MB per second (double the ATA-2/ATA-3 standard of 16.6 MB per second).
This new standard is supported by controller chip sets such as the Intel PIIX4 chip set.
For additional information about issues resolved by updates to this component, please see the following articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/161642/EN-US/ )Auto Insert Notification May Prevent Automatic Suspend
(http://support.microsoft.com/kb/160800/EN-US/ )"Fatal Exception Error" with Iomega IDE Zip Drives
(http://support.microsoft.com/kb/154976/EN-US/ )Error Message Running Jet Database Engine Stress Test
(http://support.microsoft.com/kb/154436/EN-US/ )Errors Accessing Hard Disk with Spin-Down Enabled
(http://support.microsoft.com/kb/154435/EN-US/ )Windows 95 IDE Support for SMART, DMA, and ATAPI Tape Drives
(http://support.microsoft.com/kb/153471/EN-US/ )Problems with Removable IDE Drives in Windows 95
Article ID: 171353 - Last Review: June 5, 2006 - Revision: 3.3