Reinstall the system without an optical drive

Recently, many games have been installed on a single computer, resulting in a very slow system. To improve this situation, we plan to format the hard disk and reinstall the system. But the trouble is that the drive and drive are damaged and cannot be used, and the driver cannot be found. Fortunately, the machine has two 4 GB hard disks (each with only one partition), including Hardisk0 and Harddisk1, And the BIOS is set to start from Hardisk0 (drive C, hardisk0 is installed with Windows 98 (the system we are about to reinstall), and there is a Windows 98 installer backup on Hardisk1 (D Drive). That's all.

First, back up the graphics card driver file from C: windowssystem to the d disk. But in this case, neither the C drive nor the D drive can be formatted from the MS-DOS mode of Windows 98 or from the MS-DOS mode. What should I do?

We thought of the SYS doscommand and used "SYS c: d:" To pass the system of drive c (Hardisk0) to drive d (Hardisk1). The operation was successful. Then modify the BIOS settings to start from Hardisk1. After restart, Hardisk1 is changed to drive C, and Hardisk0 is changed to drive D. Use the doscommand "Format d:/s" to Format the disk (Hardisk0) with the system. The operation is successful. Modify the BIOS settings again to the original boot from Hardisk0. the startup is successful. Double-click the Windows 98 installation program backed up on disk D (Hardisk1) to install it. Soon the system is ready, and the video card driver is installed from the file we backed up. Everything is OK. In the absence of an optical drive, not only the hard disk is formatted, but also the system is reinstalled.