SMS: INVDOS Reports 2 GB Space on FAT32 Drives Larger Than 2 GB (193031)


The information in this article applies to:

  • Microsoft Systems Management Server 1.2
This article was previously published under Q193031

SYMPTOMS

Microsoft Windows 95 OEM Service Release 2 (OSR2) and later versions of Windows (including Microsoft Windows 98) have the ability to create partitions of type FAT32. These partitions store files more efficiently by using smaller cluster sizes. However, if a FAT32 partition is greater than 2 GB, INVDOS incorrectly reports the drive as having only 2 GB of space.

CAUSE

The problem is due to a limitation of the int 21 36h call made to get the drive space information from the operating system. On these large partitions using smaller cluster sizes, the 16-bit registers will overflow, and an incorrect number is returned from the operating system.

RESOLUTION

A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Systems Management Server service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

This fix has been recently updated. Please use the new versions of the hotfix files. The NEW English version of the fix should have the following file attributes or later: 
   Date       Time               Size      File name    Platform
   -------------------------------------------------------------

   5/11/99   9:04am            118,960   95Getdsk.exe   x86
   5/11/99   9:05am             80,652     Invdos.exe   x86
   5/11/99   9:06am             58,068    Getdisk.exe   x86
NOTE: Due to file dependencies, the most recent hotfix or feature that contains the above files may also contain additional files.

For comparison purposes, the ORIGINAL English version of this fix had the following file attributes: 
   Date       Time                Size      File name   Platform
   -------------------------------------------------------------

   08/12/98   5:18pm             22,884    Getdisk.exe   x86
   08/12/98   5:38pm            117,920   95Getdsk.exe   x86

STATUS

Microsoft has confirmed this to be a problem in Systems Management Server version 1.2.

MORE INFORMATION

To install the fix, perform the following steps on the site server:
  1. Replace the Getdisk.exe, 95Getdsk.exe, and Invdos.exe files in the SMS_root\Site.srv\Maincfg.box\Client.src\X86.bin directory with the versions obtained from the hotfix.
  2. If you had not previously installed the ORIGINAL fix for this issue, you will also need to make changes to the System.map file to ensure that the 95Getdsk.exe file is copied to your clients. Note that this should be done after the updated files have been copied to the Systems Management Server site server.

    WARNING: This method involves making changes to the System.map file. Editing the System.map file incorrectly can damage your site installation, and should only be done according to this specific procedure or at the direction of Systems Management Server Support.

    To update the System.map file, perform the following steps:

    1. Use a text editor such as Notepad to open the System.map file and search for Getdisk.exe.
    2. Do a copy and a paste of the complete Getdisk.exe section. This should produce two identical Getdisk.exe sections.
    3. Replace all references to GETDISK with 95GETDSK for the second section of Getdisk.exe. Also, change the size to 118960.
    4. Save the file and close the text editor. When you are done, the System.map entry should look like the following:
               "GETDISK.EXE", SIZE(1, 16548, 16548),  "GETDISK.EXE",
         "GETDISK.EX_", REMOTE=YES,   COPYLISTS("WIN95:STANDARD" = "SMS",
         "WIN16:STANDARD" = "SMS", "DOS:STANDARD" = "SMS"), COMPRESS=NO,
         FLAGS = 5

         "95GETDSK.EXE", SIZE(1, 118960, 118960),  "95GETDSK.EXE",
         "95GETDSK.EX_", REMOTE=YES,   COPYLISTS("WIN95:STANDARD" = "SMS",
         "WIN16:STANDARD" = "SMS", "DOS:STANDARD" = "SMS"), COMPRESS=NO,
         FLAGS = 5
  3. The files will be replicated at the next Maintenance Manager work cycle to all Systems Management Server logon servers to the SMS\Logon.srv\X86.bin directory. When that occurs, you can update the clients.

    To update the clients, either manually run Upgrade.bat on each client or follow the instructions in the following article in the Microsoft Knowledge Base:

    166771 SMS: How to Force Site-Wide Client Updates

Modification Type:MajorLast Reviewed:4/7/2006
Keywords:kbQFE KBHotfixServer kbBug kbfix kbInventory KB193031
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