Client/server system and computer system

A computer system having software installed in hardware, and being connectable with a network with which another computer is connected, comprising:

• backup data holding means for holding backup data of an operating environment of its own including said hardware and software;
• system information holding means for holding an information of the operating environment of its own of the normal state;
• diagnosing means for, at a predetermined time, diagnosing the operating environment of its own by comparing it with the information of the normal state held by said system information holding means;
• and
• self-maintaining means for self-recovering the operating environment according to the content of said backup data holding means when said diagnosing means judges that an abnormality has occurred in the software, and said system is not connected with said network.

A computer system, comprising:

• backup data holding means for holding backup data of its own operating environment;
• system information holding means for holding an information of its own operating environment of the normal state;
• diagnosing means for, at an optional time, diagnosing the operating environment of its own by comparing it with the information held by said system information holding means;
• and
• self-maintaining means for self-recovering the operating environment according to the content of said backup data holding means applicable only to the part of abnormality when said diagnosing means judges that the abnormality has occurred.

A computer system having software installed in hardware, comprising:

• software holding means for holding said software;
• backup data holding means for holding backup data of an operating environment of its own including said hardware and software;
• system information holding means for holding an information of the operating environment of its own;
• diagnosing means for, at an optional time, diagnosing the operating environment on its own by comparing it with the information held by said system information holding means;
• selecting means for selecting either the not updated state or the after-updated state when said diagnosing means diagnoses that the software is updated;
• and
• self-maintaining means for updating the contents of said system file information holding means according to the contents of said software holding means, and updating the contents of said backup data holding means to meet the contents of the updated operating environment when updating of the software is selected by said selecting means, and for self-recovering the operating environment according to the content of said backup data holding means when updating of the system file is not selected by said selecting means.

A computer system having software installed in hardware, comprising:

• software holding means for holding said software;
• backup data holding means for holding backup data of an operating environment of its own including said hardware and software;
• system information holding means for holding an information of the operating environment of its own;
• diagnosing means for, at an optional time, diagnosing whether or not abnormality has occurred by comparing the operating environment of its own with the information held by said system information holding means, and whether the software is updated or not;
• selecting means for selecting either the not updated state or the after-updated state when said diagnosing means diagnoses that the software is updated;
• and
• self-maintenance means for updating the contents of said system file information holding means according to the contents of said software holding means, and updating the contents of said backup data holding means to meet the contents of said updated operating environment when updating of the software is selected by said selecting means and said diagnosing means diagnoses that abnormality has occurred, and for self-recovering the operating environment according to the content of said backup data holding means applicable only to the part which necessitates recovering when the updating of said system file is not selected by said selecting means and said diagnosing means diagnoses that abnormality has occurred.