Toshiba HARDRAM Battery Back-Up RAM and Permanent Swap File (78949)


The information in this article applies to:

  • Microsoft Windows 3.0
  • Microsoft Windows 3.1
  • Microsoft Windows 3.11
This article was previously published under Q78949

SUMMARY

The Toshiba HARDRAM battery back-up RAM causes the following system error when a permanent swap file has been set up on the RAM drive
Unable To Read From Drive:x
where x is the assignment for the HARDRAM drive.

The following line must be added to the [386Enh] section of the SYSTEM.INI file: 
VirtualHDIrq=off

MORE INFORMATION

The Toshiba HARDRAM is a battery-backed-up, RAM-based RAM drive. The battery backup allows information stored in the HARDRAM chips to be retained when the computer is rebooted or turned off.

The VirtualHDIrq=<Boolean> switch allows Windows in 386 enhanced mode to terminate interrupts from the hard disk controller, bypassing the ROM routine that handles these interrupts. Some hard drives might require that this setting be disabled for interrupts to be processed correctly. If this setting is disabled, the ROM routine handles the interrupts.
Modification Type:MinorLast Reviewed:7/19/2005
Keywords:KB78949
©2004 Microsoft Corporation. All rights reserved.