Cold boot data backup system

• US 5,713,024 A
• Filed: 11/08/1995
• Issued: 01/27/1998
• Est. Priority Date: 06/10/1994
• Status: Expired due to Fees

• Current Assignee: Exabyte Corporation (MidgardXXI, Inc.)
• Original Assignee: Exabyte Corporation (MidgardXXI, Inc.)
• Inventors: Halladay, Steven Michael
• Primary Examiner(s): Kriess, Kevin A.
• Assistant Examiner(s): Chavis, John Q.
• Application Number:
  US08/555,306
• Time in Patent Office: 811 Days
• Field of Search: 395/712, 395/652, 395/182.11
• US Class Current: 717/168
• CPC Class Codes: G06F 11/1438 Restarting or rejuvenating

Abstract

The cold boot data backup apparatus maintains an index of all data file activity on a computer system and stores copies of data files in a manner to enable a user to recreate the state of the computer system at any selected point in time. This apparatus automatically formats the computer system memory in response to a failure thereof and automatically restores the operating system, all application programs and every data file that is selected by the user to be monitored and preserved by this apparatus.

Claims

1. A cold boot data backup apparatus for automatically restoring data files stored in a memory of a computer system in response to a failure of said memory, using a backup media that is connected to said computer system which has stored thereon a copy of data files written in said memory, every version of data files changed by said computer system, comprising:

means for acquiring data indicative of data file activity on said computer system;

means, responsive to said acquired data file activity data, for generating data indicative of data files that have been changed by said data file activity;

means for retrieving only selected data files, identified by said generated data and user-input data file backup identification data, that have been changed by said data file activity from said memory;

means for storing in their entirety said retrieved data files, exclusive of other data files stored in said memory, on a backup media to produce a time ordered sequence on said backup media of every version of said selected data files;

means for automatically restoring said memory to include said data files, written in said memory and changed by said computer system, to a state substantially as they were prior to said failure using said backup media, the restoring means performing the functions of;

(1) automatically copying on a first storage medium the following;

(a) parameters of the computer system memory;

(b) a disk cold boot program;

(c) a resident format command program of the computer system;

(d) on a backup system identification history; and

(e) an auto_-- exec.bat file; and

then, after booting up of the computer system using the first storage medium. automatically

(2) executing the disk cold boot program wherein execution of the disk cold boot program causes;

(a) executing of the resident format command program for formatting the memory;

(b) generating a prompt to insert the backup media into a backup media device; and

, once the backup media has been inserted.

(c) using directory information read from the backup media and the backup system identification history to obtain the data files of the computer system memory at a predetermined point in time;

(d) using the data files acquired in function (2) (c) to perform a restoration of the memory.

2. The apparatus of claim 1 wherein said cold boot data backup apparatus further comprises:

means for creating a directory table of data file information indicative of all data files transmitted to said backup media during a backup operation; and

means for storing said directory table on said backup media upon completion of storage of a last data file listed in said data file change data.

3. The apparatus of claim 2 wherein said data file change data generating means comprises:

means for transmitting a segment of said data file change data to said backup media.

4. The apparatus of claim 1 wherein said automatically restoring means comprises:

means, responsive to said automatically reading means generating data that identifies application programs resident on said

backup media for writing said application programs from said backup media on to said memory.

5. The apparatus of claim 4 wherein said automatically restoring means further comprises:

means for writing directory data to said memory to identify said application programs loaded on said memory from said backup media.

6. The apparatus of claim 1 wherein said automatically restoring means comprises:

means, stored on said backup media, for automatically formatting said memory.

7. The apparatus of claim 6 wherein said auotmatically restoring means further comprises:

means for loading application programs from said backup media to said memory; and

means for writing directory data to said memory to identify said application programs loaded on to said memory from said backup media.

8. The apparatus of claim 7 wherein said auotmatically restoring means further comprises:

means for loading identified most recent versions of application program data files from dais backup media to said memory.

9. The apparatus of claim 8 wherein said auotmatically restoring means further comprises:

means for writing directory data to said memory to identify said identified most recent versions of application program data files loaded from said backup media to said memory.

10. A method of cold boot data backup for automatically restoring data files stored in a memory of a computer system in response to a failure of said memory, using a backup media that is connected to said computer system and has stored thereon a copy of data files written in said memory, every version of data files changed by said computer system, comprising the steps of:

acquiring data indicative of data file activity on said computer system;

generating, in response to said acquired data file activity data, data indicative of data files that have been changed by said data file activity;

retrieving only selected data files, identified by said generated data and user-input data file backup identification data, that have been changed by said data file activity from said memory;

storing said retrieved data files in their entirety, exclusive of other data files stored in said memory, on a backup media to produce a time ordered sequence on said backup media of every version of said selected data files; and

automatically restoring said memory to include said data files, written in said memory and changed by said computer system, to a state substantially as they were prior to said failure using said backup media, the step of restoring comprising;

(1) automatically copying on a first storage medium the following;

(a) parameters of the computer system memory;

(b) a disk cold boot program;

(c) a resident format command program of the computer system;

(d) backup system identification history; and

(e) an auto_-- exec.bat file; and

then, after booting up of the computer system using the first storage medium, automatically

(2) executing the disk cold boot program, wherein execution of the disk cold boot program causes;

(a) executing of the resident format command program for formatting the memory;

(b) generating a prompt to insert the memory into a backup media device; and

, once the backup media has been inserted,

(c) using directory information read from the backup media and the backup system identification history to obtain the data files of the computer system memory at a predetermined point in time;

(d) using the data files acquired in step (2) (c) to perform a restoration of the memory.

11. The method of claim 10 further comprising the steps of:

further comprising the steps of;

creating a directory table of data file information indicative of all data files transmitted to said backup media during a backup operation; and

transmitting said directory table to said backup media upon completion of storage of a last data file listed in said data file change data.

12. The method of claim 11 wherein said step of data file change data generating comprises:

transmitting a segment of said data file change data for storage on said backup media.

13. The method of claim 10 wherein said step of automatically restoring comprises:

generating data, in response to said step of automatically reading, that identifies application programs resident on said

backup media for writing said applications programs from said backup media on to said memory.

14. The method of claim 13 wherein said step of auotmatically restoring further comprises:

writing directory data to said memory to identify said application programs loaded on said memory from said backup media.

15. The method of claim 10 wherein said step of automatically restoring comprises:

automatically formatting said memory from said backup media.

16. The method of claim 15 wherein said step of automatically restoring further comprises:

loading application programs from said backup media to said memory; and

writing directory data to said memory to identify said application programs loaded on to said memory from said backup media.

17. The method of claim 16 wherein said step of automatically restoring further comprises:

loading identified most recent versions of application program data files from said backup media to said memory.

18. The method of claim 17 wherein said step of automatically restoring further comprises:

writing directory data to said memory to identify said identified most recent versions of application program data files loaded from said backup media to said memory.

19. A method of restoring the contents of a computer system hard disk using a set of executable instructions resident on the computer system, the method comprising:

(1) automatically copying on a first storage medium the following;

(a) parameters of the computer system hard disk;

(b) a disk cold boot program;

(c) a resident format command program of the computer system;

(d) a backup system identification history; and

(e) an auto_-- exec.bat file; and

then, after booting up of the computer system using the first storage medium, automatically

(2) executing the disk cold boot program, wherein execution of the disk cold boot program causes;

(a) executing of the resident format command program for formatting the hard disk;

(b) generating a prompt to insert a second storage medium into a second storage medium device; and

, once the second storage medium has been inserted,

(c) using directory information read from the second storage medium and the backup system identification history to obtain data reflecting state of the computer system hard disk at a predetermined point in time;

(d) using the data acquired in step (2) (c) to perform a restoration of the hard disk.

20. The method of claim 19, wherein steps (2) (c) and (2) (d) include using directory information read from the second storage medium and the backup system identification history to populate a database with data read from the second storage medium, and then using the database to perform a restoration of the hard disk.

21. The method of claim 19, wherein the first storage medium is a floppy disk.

22. The method of claim 19, wherein the second storage medium is magnetic tape.

23. The method of claim 19, wherein step (2) is automatically performed upon loading of the first storage medium into a peripheral storage device of the computer system.

24. The method of claim 19, wherein the hard disk parameters include format options and disk partition information.