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A host library controller and a medium changer library and communication method for the same

A host library and controller technology, applied to the input/output process of instruments, data processing, input/output to record carriers, etc., can solve the problem of medium changer command timeout, inability to know the operating status of the medium changer library 20, and errors Restoration procedures etc.

Inactive Publication Date: 2010-06-23
INT BUSINESS MASCH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Given the fact that the host library controller cannot predict how long it will take the ICU 40 to complete the transfer of issued media changer commands to the media changer library 20, and given the fact that the host library controller has no knowledge of the operation of the media changer library 20 state (unless an exact error is reported), known in the art host library controllers will likely prematurely time out a medium changer command, which causes known host library controllers to unnecessarily perform error recovery procedures

Method used

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  • A host library controller and a medium changer library and communication method for the same
  • A host library controller and a medium changer library and communication method for the same
  • A host library controller and a medium changer library and communication method for the same

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Embodiment Construction

[0020] figure 1 A host library controller 30 of the present invention is shown with X ports 31 (eg, a maximum of 16 ports 31 ). Under the inventive principles of the present invention, the host library controller 30 improves The probability of receiving an ICU response that successfully communicates a media changer command issued by the host library controller 30 to the medium changer library 20 is given.

[0021] For this, as figure 2 As shown in, one embodiment of the host library controller 30 uses a processor 32 and a memory 33 storing instructions executable in the processor 32 to implement image 3 The medium changer command communication method of the present invention is represented by the flowchart 50 shown in FIG. The premise of the medium changer command method of the present invention is that each ICU 40 uses figure 2 A queue 41, a specified number of threads 42 (eg, 3 threads), and a device driver 43 are shown in . Upon receiving the most recently issued me...

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Abstract

A host library controller employs a plurality of ports for establishing a plurality of communication paths from the host library controller to a medium changer library. The host library controller further employs a processor and a memory storing instructions for the processor to issue a command from a medium changer command set, and to select one or more of the ports for communicating the medium changer command to the medium changer library depending on a command processing status of each port.

Description

technical field [0001] The present invention generally relates to various techniques for facilitating communication between a host library controller and a medium changer library (ie, any library that uses a medium changer as one of its functional features). Specifically, the present invention relates to efficient techniques for facilitating communication between an enterprise library controller and a Small Computer System Interface ("SCSI") media changer library. Background technique [0002] figure 1 Y library devices 21 (eg, 16 library devices) using X intermediate control units ("ICUs") 40 (eg, 16 ICUs 40 ) with each ICU 40 physically connected to a medium changer library 20 are shown library system. A host library controller (not shown) known in the art includes X ports and each port is physically connected to an associated ICU 40, whereby the known host library controller systematically or randomly selects one of the ports. A port to communicate issued commands from...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06
CPCG06F3/061G06F3/0659G06F3/0686
Inventor L·A·布里安J·A·菲舍尔R·A·詹姆斯K·R·肖特韦尔
Owner INT BUSINESS MASCH CORP