Problem: ArcInfo only creates pre-70 coverage workspaces without .adf coverage file suffixes and with a .\info\arcdr9 file
When an ArcInfo Workstation command creates a new workspace, it creates a pre-70 workspace. In pre-70 workspaces, the info directory has an arcdr9 file, and many coverage directory files lack a .adf suffix.
The sysgen directory in the ArcInfo Workstation install directory contains a file named no8.3. The presence or absence of a file called 'no8.3' in $ARCHOME/sysgen controls which workspace format ARC/INFO uses. If the file exists, workspaces will be created in the pre-7.0 format. If the file does not exist (the default condition), then new workspaces will be created in the 7.0 format. The no8.3 file is a simple ASCII file containing dummy characters.
Solution or Workaround
Delete the %ARCHOME%\sysgen\no8.3 file.
For additional information on the no8.3 file, see the command documentation for the ARC CREATEWORKSPACE.
For additional information on the difference between a pre-70 and a 70 style workspace, see the command documentation for CONVERTWORKSPACE and the help topic 'What is an ArcInfo workspace?'.