Recovering a system that has experienced a fault

• US 7,089,449 B1
• Filed: 11/06/2000
• Issued: 08/08/2006
• Est. Priority Date: 11/06/2000
• Status: Expired due to Term

• Current Assignee: Micron Technology, Inc.
• Original Assignee: Micron Technology, Inc.
• Inventors: Thorn, Raymond W., Cluff, Scott A.
• Primary Examiner(s): Baderman, Scott
• Assistant Examiner(s): CHU, GABRIEL L
• Application Number:
  US09/706,960
• Time in Patent Office: 2,101 Days
• Field of Search: 714 5- 7, 714/15, 711/162
• US Class Current: 714/15
• CPC Class Codes: G06F 11/1417 Boot up procedures
• CPC Class Codes: G06F 11/1456 Hardware arrangements for backup
• CPC Class Codes: G06F 11/1464 for networked environments
• CPC Class Codes: G06F 11/1469 Backup restoration techniques

Abstract

A method and system of recovering a system that has experienced a fault includes a backup device to enable access of a network through the interface in response to the fault. The system includes a main operational portion that controls operation of the system under normal conditions. However, if a fault occurs, then the backup device can be selected to take over control of the system so that data can be retrieved from a backup storage to recover the system. The backup device includes software and/or hardware components to enable the system to access a network even though the main operational portion may not be functioning properly.

Claims

1. A system comprising:

an interface to a network;

a first operational element to perform one or more tasks in the system;

a storage element containing a flag to indicate if a fault has occurred with the first operational element; and

a backup device to enable access of the network through the interface in response to the flag indicating failure of the first operational element.

2. The system of claim 1, wherein the first operational element comprises a disk drive.

3. The system of claim 1, wherein the interface comprises a network stack having an Internet Protocol (IP) layer, wherein the backup device comprises a backup storage element containing a backup routine adapted to perform communications through the network stack including the IP layer to the network.

4. The system of claim 3, wherein the backup routine comprises a browser.

5. The system of claim 3, wherein the first operational element comprises a first disk drive, and wherein the backup storage element comprises a second disk drive separate from the first disk drive.

6. The system of claim 5, wherein the second disk drive has a smaller storage capacity than the first disk drive.

7. The system of claim 3, wherein the backup storage element comprises non-volatile memory.

8. The system of claim 3, wherein the backup device is adapted to retrieve an image containing user data and operating system software over the network in response to the flag.

9. The system of claim 1, wherein the first operational element comprises a disk drive having plural partitions, and wherein the backup device comprises one of the partitions.

10. The system of claim 1, wherein the backup device comprises a removable disk drive.

11. The system of claim 1, the backup device to retrieve user data and software over the network to recover the system.

12. The system of claim 11, wherein the software comprises operating system software.

13. The system of claim 1, wherein the first operational element comprises a storage element, the backup device to retrieve an image of the storage element to recover the storage element to its operational state.

14. The system of claim 1, further comprising a BIOS routine to detect a state of the flag, the BIOS routine to access the backup device in response to detecting that the flag indicates the fault.

15. A method of performing error recovery in a system, comprising:

detecting if an operating portion of the system has experienced a fault;

accessing a backup device to enable communication through a network stack including an Internet Protocol (IP) layer over a network;

retrieving data through the network stack including the IP layer over the network, the data comprising an image containing user data and an operating system;

recovering the system using the image; and

loading a backup software routine from the backup device,

wherein the backup software routine comprises a browser, the method further comprising executing the browser to access the network through the network stack including the IP layer to retrieve the data.

16. A method of performing recovery in a system having a main storage device and a backup storage device, comprising:

booting from a backup storage device instead of the main storage device if the system has experienced a fault;

using the backup storage device to enable communications through a network stack including an Internet Protocol (IP) layer over a network to retrieve an image to recover the system, wherein the image comprises user data and an operating system; and

loading a routine from the backup storage device to enable the network communication through the network stack including the IP layer,

wherein loading the routine comprises loading a browser.

17. An article comprising at least one storage medium containing instructions that when executed cause a system to:

detect if an operating portion of the system has experienced a fault;

access a backup device to enable communication over a network;

retrieve data to recover the system over the network;

in response to the fault, scan a storage device to identify portions of the storage device that are defective;

store the retrieved data in portions of the storage device other than the portions that are identified to be defective by the scan,

wherein retrieving the data comprises retrieving an image containing user data and operating system software;

set a flag in response to the fault, the flag to indicate that the system has experienced the fault;

load a BIOS routine to detect whether the flag is set; and

cause the BIOS routine to load a second routine in response to detecting the flag is set, the second routine to retrieve the data to recover the system over the network.

18. The article of claim 17, wherein storing the retrieved data comprises storing the retrieved image containing the user data and operating system software in the portions of the storage device other than the portions that are identified to be defective by the scan.