Data processing system and data processing method

• US 20070174544A1
• Filed: 03/16/2006
• Published: 07/26/2007
• Est. Priority Date: 01/26/2006
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kurokawa, Isamu, Sakaki, Hidetoshi, Yasuda, Miyuki
• Application Number:
  US11/376,096
• Publication Number:
  US 20070174544A1
• Time in Patent Office: Days
• US Class Current: 711/112
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD

Abstract

A data processing system including a disc unit having a plurality of logical devices, a central processing unit for issuing commands with the plurality of logical devices designated as a processing range, and a disc controller for executing the commands for all of the logical devices designated as the processing range. The commands are issued by the central processing unit to the disc controller by executing an initial program load or channel path online.

Claims

1. A data processing system comprising:

a disc unit having a plurality of logical devices;

a central processing unit issuing a CTL command for routing/device checking, a CTL command for mode setting/reading, an SNS command for mode setting/reading, or a CTL/SNS command for mode setting/reading taking a plurality of logical devices as a processing range; and

a disc controller executing the commands for all of the logical devices designated as the processing range.

2. The data processing system according to claim 1, wherein, upon receiving a response to the command from the disc controller, the central processing unit checks whether the response is a response to a CTL command for routing/device checking, a response to a CTL command for mode setting/reading, a response to an SNS command for mode setting/reading, or a response to a CTL/SNS command for mode setting/reading, and carries out receipt processing for the response for all of the logical devices designated in the processing range.

3. The data processing system according to claim 1, wherein the command is issued by the central processing unit to the disc controller so as to execute an initial program load or channel path online.

4. The data processing system according to claim 1, wherein sense commands for collecting together information relating to all of the logical devices designated as the processing range for reading out from the disc controller are chained to the designated commands taking the plurality of logical devices as the processing range.

5. The data processing system according to claim 1, wherein the central processing unit comprises a unit control block for managing input and output requests to the logical devices, and for locking a plurality of unit control blocks correlating respectively to all of the logical devices designated as the processing range.

6. The data processing system according to claim 1, wherein the processing range is all logical devices belonging to the same control unit.

7. The data processing system according to claim 1, wherein information for logical paths belonging to the same path group is included in the command, and the disc controller executes the command for all of the logical paths belonging to the same path group.

8. The data processing system according to claim 1, wherein the command is a plurality of different types of commands chained together.

9. The data processing system according to claim 1, wherein the disc unit comprises a base device and a plurality of alias devices allocated to the base device, information indicating the relationship between the base device and the plurality of alias devices allocated to the base device is included as the processing range, and the disc controller processes a plurality of processing requests to the plurality of alias devices as processing requests to the base device.

10. A data processing system comprising:

a disc unit having a plurality of logical devices;

a central processing unit for a mainframe for issuing a CTL command for routing/device checking, a CTL command for mode setting/reading, an SNS command for mode setting/reading, or a CTL/SNS command for mode setting/reading with a plurality of logical devices designated as the processing range by executing by executing initial program load or channel path online; and

a disc controller executing the commands for all of the logical devices designated as the processing range.

11. The data processing system according to claim 10, wherein, upon receiving the command response from the disc controller, the central processing unit checks whether the response is a response to a CTL command for routing/device checking, a response to a CTL command for mode setting/reading, a response to an SNS command for mode setting/reading, or a response to a CTL/SNS command for mode setting/reading, and carries out receipt processing for the response for all of the logical devices designated in the processing range.

12. A data processing method comprising the steps of:

issuing a CTL command for routing/device checking, a CTL command for mode setting/reading, an SNS command for mode setting/reading, or a CTL/SNS command for mode setting/reading taking a plurality of logical devices as a processing range; and

executing the commands for all of the logical devices designated as the processing range.

13. The data processing method according to claim 12, further comprising a step of, upon receiving the command response, checking whether the response is a response to a CTL command for routing/device checking, a response to a CTL command for mode setting/reading, a response to an SNS command for mode setting/reading, or a response to a CTL/SNS command for mode setting/reading, and carries out receipt processing for the response for all of the logical devices designated in the processing range.

14. The data processing method according to claim 12, wherein the command is issued by the central processing unit to the disc controller so as to execute an initial program load or channel path online.

15. The data processing method according to claim 12, wherein sense commands for collecting together information relating to all of the logical devices designated as the processing range for reading out from the disc controller are chained to the designated commands taking the plurality of logical devices as the processing range.

16. The data processing method according to claim 12, further comprising a step of locking a plurality of unit control blocks correlating respectively to all of the logical devices designated in the processing range.

17. The data processing method according to claim 12, wherein the processing range is all logical devices belonging to the same control unit.

18. The data processing method according to claim 12, wherein information for logical paths belonging to the same path group is included in the command, and the command execution step executes the command for all of the logical paths belonging to the same path group.

19. The data processing method according to claim 12, wherein the command is a plurality of different types of commands chained together.

20. The data processing method according to claim 12, wherein information indicating the relationship between a base device and a plurality of alias devices allocated to the base device is included as the processing range, and the command execution step processes a plurality of processing requests to the plurality of alias devices as processing requests to the base device.