On my WIN box, format a: /s is no longer supported. So I either format it with system files or I create a rescue disk!

I tried formatting with system files from a WIN95 box and tried booting on a WIN98 machine. This did not work as the c: was not found. I think this is because it was missing io.sys and msdos.sys.

So, I tried formatting with system files from the WIN98 box and everything now works with only the following files on the DOS doot disk:

autoexec.bat
command.com
io.sys
msdos.sys
drvspace.bin

What is drvsapce.bin???

TIA,