Changing Minimum Disk Space Requirements

If you change the files installed by Setup, it is a good idea to change the minimum disk space requirement as well. If the disk space requirement is too large, Setup will request more free disk space than necessary, and you might not be able to install on computers that really do have enough disk space. If the disk space requirement is too small, Setup may fail when trying to copy files to a full hard disk.

First, modify the DOSNET.INF file by changing the value for NtDrive in the [SpaceRequirements] section, as follows:

[SpaceRequirements]
BootDrive = 1048576
# NtDrive   = 89128960 NOTE: Commented out original disk space requirement.
NtDrive   = 76000000

NtDrive specifies the number of bytes required on the drive where Windows NT is to be installed. Change this number as appropriate. For example, if you exclude 3 megabytes of files that were included in the original Windows NT installation, subtract 3 megabytes from the NtDrive number. If you add 3 megabytes of files to the Windows NT installation, add 3 megabytes to the NtDrive number. Do not change the value for BootDrive.

Also, change the values for FreeDiskSpace and UpgradeFreeDiskSpace in the [SetupData] section of the TXTSETUP.SIF file.