Diagnostic operations within a switched fibre channel arbitrated loop system

• US 7,661,017 B2
• Filed: 01/30/2007
• Issued: 02/09/2010
• Est. Priority Date: 01/30/2007
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Cagno, Brian James, Smith, Donald Scott, Qiu, Kenny Nian Gan
• Primary Examiner(s): Iqbal; Nadeem
• Application Number:
  US11/668,879
• Publication Number:
  US 20080184074A1
• Time in Patent Office: 1,106 Days
• Field of Search: 714 2- 8, 714/13, 714/15, 714/20, 714/37, 714/38, 714/42, 714/43, 714/54
• US Class Current: 714/5.11
• CPC Class Codes: G06F 11/0727 in a storage system, e.g. in a DASD or network based storage system drivers for digital recording or reproducing units G06F3/06; circuits for error detection or correction within digital recording or reproducing units G11B20/18; for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS], H04L67/1097
• CPC Class Codes: G06F 11/079 Root cause analysis, i.e. error or fault diagnosis in a hardware test environment G06F11/22; in a software test environment G06F11/36

Abstract

Provided are a method, system, and article of manufacture wherein at least a first zone is maintained in a fibre channel arbitrated loop system, and wherein a plurality of storage devices is included in the first zone. A determination is made that diagnostic operations have to be performed on a storage device that is included in the plurality of storage devices. A second zone is generated, wherein the second zone includes the storage device on which the diagnostic operations have to be performed, and wherein the storage device is removed from the plurality of storage devices in the first zone leaving a remaining set of storage devices in the first zone. Diagnostic operations are performed on the storage device in the second zone while other operations are performed on the remaining set of storage devices in the first zone.

Claims

1. A method, comprising:

maintaining at least a first zone in a fibre channel arbitrated loop system, wherein a plurality of storage devices is included in the first zone;

determining that diagnostic operations have to be performed on a storage device that is included in the plurality of storage devices;

generating a second zone that includes the storage device on which the diagnostic operations have to be performed, wherein the storage device is removed from the plurality of storage devices in the first zone leaving a remaining set of storage devices in the first zone; and

performing diagnostic operations on the storage device in the second zone while other operations are performed on the remaining set of storage devices in the first zone, wherein the fibre channel arbitrated loop system is comprised of;

a host system;

a storage controller in communication with the host system;

a plurality of fibre channel arbitrated loop switches in communication with the storage controller, wherein the plurality of storage devices is coupled to the plurality of fibre channel arbitrated loop switches; and

a plurality of local processors coupled to the plurality of fibre channel arbitrated loop switches, wherein at least one local processor communicates with at least one storage device via at least one fibre channel arbitrate loop switch that couples the at least one local processor to the at least one storage device.

2. The method of claim 1, wherein the storage device in the second zone is a first storage device, wherein the remaining set of storage devices in the first zone includes a second storage device, the method further comprising:

maintaining a local processor of the plurality of local processors coupled to the first storage device in the second zone and a second storage device in the first zone;

performing the diagnostic operations on the first storage device via the local processor; and

performing selected operations from the other operations on the second storage device via the local processor.

3. The method of claim 1, wherein the first zone and the second zone include a fibre channel arbitrated loop switch that allows fibre channel zoning, wherein the fibre channel zoning permits the fibre channel arbitrated loop switch to be a member of at least two overlapping fibre channel zones.

4. The method of claim 1, wherein the plurality of storage devices are configured to be in a loop in the fibre channel arbitrated loop system.

5. A fibre channel arbitrated loop system, comprising:

a memory;

a plurality of storage devices coupled to the memory; and

processor coupled to the memory, wherein the processor performs operations, the operations comprising;

(i) maintaining at least a first zone in the fibre channel arbitrated loop system, wherein the plurality of storage devices is included in the first zone;

(ii) determining that diagnostic operations have to be performed on a storage device that is included in the plurality of storage devices;

(iii) generating a second zone that includes the storage device on which the diagnostic operations have to be performed, wherein the storage device is removed from the plurality of storage devices in the first zone leaving a remaining set of storage devices in the first zone; and

(iv) performing diagnostic operations on the storage device in the second zone while other operations are performed on the remaining set of storage devices in the first zone, wherein the fibre channel arbitrated loop system further comprises;

a host system;

a storage controller in communication with the host system;

a plurality of fibre channel arbitrated loop switches in communication with the storage controller, wherein the plurality of storage devices is coupled to the plurality of fibre channel arbitrated loop switches; and

a plurality of local processors coupled to the plurality of fibre channel arbitrated loop switches, wherein at least one local processor communicates with at least one storage device via at least one fibre channel arbitrate loop switch that couples the at least one local processor to the at least one storage device.

6. The fibre channel arbitrated loop system of claim 5, wherein the storage device in the second zone is a first storage device, wherein the remaining set of storage devices in the first zone includes a second storage device, the fibre channel arbitrated loop system further comprising:

a local processor of the plurality of local processors coupled to the first storage device in the second zone and a second storage device in the first zone, wherein the diagnostic operations are performed on the first storage device via the local processor, and wherein selected operations from the other operations on the second storage device via the local processor.

7. The fibre channel arbitrated loop system of claim 5, wherein the first zone and the second zone include a fibre channel arbitrated loop switch that allows fibre channel zoning, wherein the fibre channel zoning permits the fibre channel arbitrated loop switch to be a member of at least two overlapping fibre channel zones.

8. The fibre channel arbitrated loop system of claim 5, wherein the plurality of storage devices are configured to be in a loop in the fibre channel arbitrated loop system.

9. An article of manufacture, wherein the article of manufacture performs operations on a computer, the operations comprising:

maintaining at least a first zone in a fibre channel arbitrated loop system, wherein a plurality of storage devices is included in the first zone;

determining that diagnostic operations have to be performed on a storage device that is included in the plurality of storage devices;

generating a second zone that includes the storage device on which the diagnostic operations have to be performed, wherein the storage device is removed from the plurality of storage devices in the first zone leaving a remaining set of storage devices in the first zone; and

performing diagnostic operations on the storage device in the second zone while other operations are performed on the remaining set of storage devices in the first zone, wherein the fibre channel arbitrated loop system is comprised of;

a host system;

a storage controller in communication with the host system;

a plurality of fibre channel arbitrated loop switches in communication with the storage controller, wherein the plurality of storage devices is coupled to the plurality of fibre channel arbitrated loop switches; and

a plurality of local processors coupled to the plurality of fibre channel arbitrated loop switches, wherein at least one local processor communicates with at least one storage device via at least one fibre channel arbitrate loop switch that couples the at least one local processor to the at least one storage device.

10. The article of manufacture of claim 9, wherein the storage device in the second zone is a first storage device, wherein the remaining set of storage devices in the first zone includes a second storage device, the operations farther comprising:

maintaining a local processor of the plurality of local processors coupled to the first storage device in the second zone and a second storage device in the first zone;

performing the diagnostic operations on the first storage device via the local processor; and

performing selected operations from the other operations on the second storage device via the local processor.

11. The article of manufacture of claim 9, wherein the first zone and the second zone include a fibre channel arbitrated loop switch that allows fibre channel zoning, wherein the fibre channel zoning permits the fibre channel arbitrated loop switch to be a member of at least two overlapping fibre channel zones.

12. The article of manufacture of claim 9, wherein the plurality of storage devices are configured to be in a loop in the fibre channel arbitrated loop system.

13. A method for deploying computing infrastructure, comprising integrating computer-readable code stored in a tangible storage medium into a computer, wherein the code in combination with the computer is capable of performing:

maintaining at least a first zone in a fibre channel arbitrated loop system, wherein a plurality of storage devices is included in the first zone;

determining that diagnostic operations have to be performed on a storage device that is included in the plurality of storage devices;

generating a second zone that includes the storage device on which the diagnostic operations have to be performed, wherein the storage device is removed from the plurality of storage devices in the first zone leaving a remaining set of storage devices in the first zone; and

performing diagnostic operations on the storage device in the second zone while other operations are performed on the remaining set of storage devices in the first zone, wherein the fibre channel arbitrated loop system is comprised of;

a host system;

a storage controller in communication with the host system;

a plurality of fibre channel arbitrated loop switches in communication with the storage controller, wherein the plurality of storage devices is coupled to the plurality of fibre channel arbitrated loop switches; and

a plurality of local processors coupled to the plurality of fibre channel arbitrated loop switches, wherein at least one local processor communicates with at least one storage device via at least one fibre channel arbitrate loop switch that couples the at least one local processor to the at least one storage device.

14. The method for deploying computing infrastructure of claim 13, wherein the storage device in the second zone is a first storage device, wherein the remaining set of storage devices in the first zone includes a second storage device, wherein the code in combination with the computer is further capable of performing:

maintaining a local processor of the plurality of local processors coupled to the first storage device in the second zone and a second storage device in the first zone;

performing the diagnostic operations on the first storage device via the local processor; and

performing selected operations from the other operations on the second storage device via the local processor.

15. The method for deploying computing infrastructure of claim 13, wherein the first zone and the second zone include a fibre channel arbitrated loop switch that allows fibre channel zoning, wherein the fibre channel zoning permits the fibre channel arbitrated loop switch to be a member of at least two overlapping fibre channel zones.

16. The method for deploying computing infrastructure of claim 13, wherein the plurality of storage devices are configured to be in a loop in the fibre channel arbitrated loop system.