China DOS Union

Symptoms: HP hard drive 210M, the computer can boot from floppy. When using A:\FORMAT C:/S to format the hard drive,
the following prompts appear:
checking existing disk format
saving unformat information
drive c error insufficent memory to read all system info
there was an error creating the format recovery file
this disk cannot be unformatted
If I force-format the hard drive, then command.com gets changed to mommand.com, and at the same time
a file named C is generated, with a size of 0 bytes. Before this, the hard drive had already been low-level formatted. Used fdisk to partition and activate
the master boot sector

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