Microsoft KB Archive/112364

= OFF: Not Enough Disk Space Installing to Compressed Drive =

Article ID: 112364

Article Last Modified on 8/16/2005

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APPLIES TO


 * Microsoft Office 97 Standard Edition
 * Microsoft Office 95 Standard Edition
 * Microsoft Office 4.0 Standard Edition
 * Microsoft Office 4.2 Standard Edition
 * Microsoft Project 4.0 Standard Edition
 * Microsoft Works 3.0 Standard Edition

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This article was previously published under Q112364



SYMPTOMS
When you install a program to a compressed drive, you may receive a "disk full" error message. This behavior may occur after the Setup program indicates (at the beginning of the installation) that you have sufficient disk space to install all of the desired components.



CAUSE
When you install to a compressed drive, the amount of disk space reported as being available may be misleading depending on the types of files that are on the compressed drive and how effective the disk compression technology is when you compress different types of data. Because this number may be incorrect, you may need significantly more disk space than is reported as being required by setup.



MORE INFORMATION
You are most likely to run into this problem if the types of files that are being installed to the compressed drive are files that cannot be effectively compressed by the disk compression method being used.

For example, the clip art files that come with PowerPoint version 4.0 for Windows are in a special PictureStore format (*.pcs) that is so highly compressed that they cannot be compressed any more. If your compression technology is assuming an average compression ratio of 2:1, this means that for each 1 megabyte (MB) of *.pcs files that you choose to install, you would actually need to have 2 MB of compressed drive space available. PowerPoint includes over 5 MB of *.pcs files, so when you install to a 2:1 compressed drive, you will need 5 MB more available disk space than setup says is required.



STATUS
Microsoft is researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: buglist pp4bug 1.0 1.00 5.00 6.00 8.00 97 ppt95 ppt97 off97 macppt winppt

Keywords: kbsetup KB112364

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