When organizing today, I found that the first disk has indicated that the second one might have errors.
0.2 FIXCHGLN -- Command for handling errors on the second disk
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During the installation process, some machines may not correctly detect the change of disks. A typical situation is an error when installing the second disk. If this happens, please follow these steps to install:
1) Put the SETUP disk into drive A, then press CTRL+ALT+DEL to restart.
2) When prompted whether to install PC DOS, type N.
3) At the DOS command prompt, type FIXCHGLN and press ENTER.
4) At the DOS command prompt, type AUTOEXEC and press ENTER.
5) When prompted whether to install PC DOS, type Y to install.
If this still doesn't solve the problem, then it must be that the disk itself is faulty.