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Article ID: 124558 - Last Review: November 15, 2006 - Revision: 1.1

 
This article was previously published under Q124558

SYMPTOMS

You receive the following error messages when you run DriveSpace to perform an operation that requires full restartability:
  • Files required to manage your compressed drive(s) are missing on drive <x>. To restore these files, copy the MINI.CAB file from your Windows 95 Setup Disk 1 or CD-ROM into your Windows directory. The next time you run DriveSpace, the missing files will be restored.

    ID Number: DRVSPACE575

    -and-
  • Windows might not be able to restart this operation if it is interrupted. Check to make sure drive x is not full; you may need as much as 1.5 MB of free space to continue.

    ID Number: DRVSPACE311

CAUSE

These errors occur when the files in the hidden FAILSAFE.DRV\FAILSAFE directory on drive C (or the host for drive C) are missing and DriveSpace cannot find the MINI.CAB file in your Windows 95 SYSTEM subdirectory.

These errors can also occur if there is a file named Failsafe.drv in the root folder of drive C (or the host for drive C).

RESOLUTION

Copy the MINI.CAB file from your original Windows 95 distribution media to your Windows 95 SYSTEM subdirectory.

NOTE: MINI.CAB is located on the standard 1.44-megabyte (MB) disk 1 of the 3.5-inch distribution media format (DMF) disk set and can be copied using Windows Explorer or at an MS-DOS prompt (using EXTRACT is not necessary). On CD-ROM installation media, MINI.CAB is located in the WIN95 directory.

MORE INFORMATION

DriveSpace operations that can prevent Windows from restarting properly if interrupted by a power loss or accidental reboot are fully restartable. To ensure restartability in these cases, DriveSpace uses a mini-version of Windows (a subset of Windows 3.1 also used by Setup).

DriveSpace extracts the mini-version files (from the MINI.CAB file in your Windows 95 SYSTEM subdirectory to a hidden FAILSAFE.DRV directory on the physical boot drive) before beginning an operation that requires full restartability. This ensures that DriveSpace can complete its operation in the event of a power loss or accidental reboot.

DriveSpace requires the mini-version of Windows during the following operations:
  • Compressing an existing drive that contains Windows files (including the swap file).
  • Uncompressing a DriveSpace- or DoubleSpace-compressed drive that contains Windows files (including the swap file).
  • Changing the size of a DriveSpace- or DoubleSpace-compressed drive that contains Windows files (including the swap file).
  • Changing the estimated compression ratio (ECR) for a DriveSpace- or DoubleSpace-compressed drive that contains Windows files (including the swap file).
You should not delete the FAILSAFE.DRV directory created by DriveSpace unless you have a MINI.CAB file in your Windows SYSTEM subdirectory. DriveSpace does not delete FAILSAFE.DRV after successfully completing a restartable operation. This allows future restartable operations to be completed more quickly.

APPLIES TO
  • Microsoft Windows 95
Keywords: 
kbdiskmemory KB124558
Retired KB ArticleRetired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
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