Mirroring computer data

• US 6,460,123 B1
• Filed: 12/03/1996
• Issued: 10/01/2002
• Est. Priority Date: 12/03/1996
• Status: Expired due to Term

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: EMC Corporation (Dell Technologies Inc.)
• Inventors: Blumenau, Steven M.
• Primary Examiner(s): Hudspeth, David
• Assistant Examiner(s): TZENG, FRED
• Application Number:
  US08/757,123
• Time in Patent Office: 2,128 Days
• Field of Search: 395/200.52, 395/200.33, 395/712, 395/829, 395/182.04, 395/500, 395/280, 711/162, 711/114, 711/1
• US Class Current: 711/162
• CPC Class Codes: G06F 11/1464 for networked environments
• CPC Class Codes: G06F 11/2071 using a plurality of controllers

Abstract

A computer including an interpreter that maps logical user write requests to physical block level write requests, a host storage driver having a disk driver interface for receiving block level write requests, a host storage disk connected to be controlled by disk control signals of the host storage driver, and a mirror system having a disk driver interface to the interpreter and a remote procedure call interface to a remote archive repository, the mirror system sending write requests and data to be written from the interpreter to the host storage driver and to the remote archive repository.

Claims

1. A computer having capabilities for backing up data to a remote archive repository, said computer comprising

an interpreter that maps logical user write requests to physical block level write requests,

a host storage driver having a disk driver interface for receiving block level write requests, said host storage driver generating disk control signals to write blocks of data to disk in response to block level write requests,

a host storage disk connected to be controlled by said disk control signals of said host storage driver, and

a mirror system having a disk driver interface to said interpreter and a remote procedure call interface to a remote archive repository, said mirror system sending write requests and data to be written from said interpreter to said host storage driver and to said remote archive repository.

2. The computer of claim 1 wherein said interpreter comprises a file system of an operating system of said computer.

3. The computer of claim 1 wherein said interpreter comprises a database server application.

4. The computer of claim 1 wherein said mirror system includes a mirror driver and an archive media system, said mirror driver providing said disk driver interface and also having an operating system device driver application programming interface to said archive media system, said archive media system being implemented in the user space of said computer and communicating with said remote archive repository.

5. A computer system comprising

a network,

a remote archive repository connected to said network, and

a plurality of computers that are connected to said network and have backup capabilities for mirroring data on respective host storage disks of said computers to said remote archive repository, each said computer comprising

an interpreter that maps logical user write requests to physical block level write requests,

a host storage driver having a disk driver interface for receiving block level write requests, said host storage driver generating disk control signals to write blocks of data to disk in response to block level write requests,

a host storage disk connected to be controlled by said disk control signals of said host storage driver, and

a mirror system having a disk driver interface to said interpreter and a remote procedure call interface to said remote archive repository, said mirror system passing write requests and data to be written from said interpreter to said host storage driver and to said remote archive repository.

6. The computer system of claim 5 wherein at least one said interpreter of a said computer comprises a file system of an operating system of said computer.

7. The computer system of claim 5 wherein at least one said interpreter of a said computer comprises a database server application.

8. The computer system of claim 5 wherein at least one said mirror system of a said computer includes a mirror driver and an archive media system, said mirror driver providing said disk driver interface and also having an operating system device driver application programming interface to said archive media system, said archive media system being implemented in the user space of said computer and communicating with said remote archive repository.

9. The computer system of claim 5 wherein said remote archive repository includes a control program and disk storage.

10. The computer system of claim 9 wherein said remote archive repository includes a tape library.

11. A computer implemented method of backing up data written on a host storage disk of a computer to a remote archive repository, said method comprising

mapping logical user write requests to physical block level write requests at an interpreter of said computer,

receiving said physical block level write requests at a mirror system of said computer having a disk driver interface to said interpreter and a remote procedure call interface to a remote archive repository, and

sending said write requests and data to be written from said mirror system to a host storage driver of said computer for writing on said host storage disk and to said remote archive repository.

12. The method of claim 11 wherein said interpreter of said computer comprises a file system of an operating system of said computer.

13. The method of claim 11 wherein said interpreter of said computer comprises a database server application.

14. The method of claim 11 wherein said mirror system of said computer includes a mirror driver and an archive media system, said mirror driver providing said disk driver interface and also having an operating system device driver application programming interface to said archive media system, said archive media system being implemented in the user space of said computer and communicating with said remote archive repository.

15. The method of claim 11 wherein said remote archive repository includes a control program and disk storage.

16. The method of claim 15 wherein said remote archive repository includes a tape library.

17. A computer program for implementation on a computer to back up data to a remote archive repository, said computer program residing on a computer-readable medium, said computer comprising

an interpreter that maps logical user write requests to physical block level write requests,

a host storage driver having a disk driver interface for receiving block level write requests, said host storage driver generating disk control signals to write blocks of data to disk in response to block level write requests, and

a host storage disk connected to be controlled by said disk control signals of said host storage driver,

said computer program comprising instructions causing said computer to create a mirror system having a disk driver interface to said interpreter and a remote procedure call interface to a remote archive repository, said mirror system sending write requests and data to be written from said interpreter to said host storage driver and to said remote archive repository.

18. The computer program of claim 17 wherein said mirror system includes a mirror driver and an archive media system, said mirror driver providing said disk driver interface and also having an operating system device driver application programming interface to said archive media system, said archive media system being implemented in the user space of said computer and communicating with said remote archive repository.