  
PSS ID Number: Q119072
Article last modified on 12-04-1995
PSS database name: MSDOS
 
6.00 6.20 6.22
 
MS-DOS

DoubleSpace/DriveSpace Limits on 1028MB to 1153MB Partitions. 

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The information in this article applies to:
 
 - Microsoft MS-DOS operating system versions 6.0, 6.2, 6.22
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This information applies to both Microsoft DoubleSpace and Microsoft
DriveSpace. For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands
and filenames.
 
SYMPTOMS
========
 
When you are compressing a disk using DriveSpace or DoubleSpace, you
receive the following error message:
 
   DriveSpace ran out of free space and some files were left on the newly
   created drive.
 
CAUSE
=====
 
If you run DoubleSpace or DriveSpace on a disk with a partition size
between 1028 megabytes (MB) and 1153 MB, you cannot create compressed
drives that reach the standard limit of 512 MB.
 
WORKAROUND
==========
 
To work around this situation, you must change the partition size to less
than 1 gigabyte before you run DoubleSpace or DriveSpace.
 
STATUS
======
 
Microsoft has confirmed this to be a problem in DoubleSpace and DriveSpace.
We are researching this problem and will post new information here in the
Microsoft Knowledge Base as it becomes available.
 
MORE INFORMATION
================
 
Compressed volume files (CVFs) that are created on partitions between 1028
MB and 1153 MB cannot be increased. Additionally, the maximum estimated
compression ratio (ECR) that can be entered is 1.5 to 1. You can usually
make the CVF smaller and decrease the ECR.
 
If all the data cannot be compressed, it remains available on the host
drive.
 
Following are examples of the maximum size of the CVF for a number of
partition sizes between 1028 MB and 1153 MB:
 
   Partition   CVF
   ---------------
    1028      11
    1034      16
    1030      33
    1040      50
    1050      88
    1070     145
    1080     168
    1090     184
    1144     341
 
NOTE: All values are in megabytes.
 
For more information about CVF size limits, query on the following words
in the Microsoft Knowledge Base:
 
   dblspace and limitation and size
 
For more information about partitioning drives, refer to the Application
Note PD0771. For information about obtaining this Application Note, query
on the following words in the Microsoft Knowledge Base:
 
   pd0771 and appnote
 
KBCategory: kbtool kbfile kbappnote kberrmsg
KBSubcategory: msdos
Additional reference words: appnote 6.00 6.20 1.1GB max logical limitation
resize
eide lba 1gb
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Copyright Microsoft Corporation 1995.


 
