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Method-and-system-for-converting-computer-peripheral-equipment-to-SCSI-compliant-devices

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Method and system for converting computer peripheral equipment to SCSI-compliant devices

Details

Inventors: Born, Richard M.;
Assignee: LSI Logic Corporation (Milpitas, CA)
Primary Examiner: Ray; Gopal C.
Assistant Examiner:
Attorney, Agent or Firm:

A method and system for converting computer peripheral equipment to SCSI-compliant devices includes an interface controller which converts a mass storage device communicating on an ATA interface to a target device communicating in SCSI commands across an IEEE-1394 interface. The controller converts SCSI commands in CDBs in the IEEE-1394 ORBs to ATA ORBs and then directly to ATA/ATAPI commands, through a mapping function.

DETAILED DESCRIPTION The present invention is directed to a conversion apparatus attachable to a peripheral device which operates on an ATA/ATAPI communication protocol, to allow the computer peripheral device to communicate in a SCSI communication protocol with a remote host computer to which the peripheral device can be attached.
The conversion apparatus includes an input stage that delivers and receives data to and from the remote host computer in the SCSI communication protocol.
The conversion apparatus also includes a mapping stage communicating with the input stage to convert between the SCSI and ATA/ATAPI communication protocols bi-directionally.
The conversion apparatus further includes a transfer stage communicating with the mapping stage and delivering and receiving data to and from the peripheral device in the ATA/ATAPI communication protocol.
The mapping stage may include converting between SCSI CDBs and ATA commands, data, and status across an ATA interface.
The mapping stage may further include an intermediate stage of converting to ATA CDBs.
The data sent to and from the host computer may be sent across a communication link to which the input stage of the conversion apparatus is attachable, the communication link and the input stage being IEEE-1394 compliant.
The input stage may include a physical layer and a link layer.
The mapping stage may include a buffer in communication with an ATA sequencer in cooperation with a microprocessor and associated program memory.
The transfer stage may include an ATA sequencer in communication with an input/output port attachable to an ATA interface cable.
The present invention is also directed to a computer system that includes a host computer having an input/output port for communicating in a SCSI communication protocol.
The computer system also includes a communication link having at least two ends, with a first end connected to the input/output port of the host computer.
The computer system further includes a peripheral device located at a spaced apart distance from the host computer, the device having an input/output port for communicating in an ATA communication protocol

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