Method of and system for using device drivers to couple the communication and data storage of remote computer systems

• US 4,982,324 A
• Filed: 12/19/1988
• Issued: 01/01/1991
• Est. Priority Date: 12/19/1988
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: McConaughy, John M., Pancoast, Steven T.
• Primary Examiner(s): Zache, Raulfe B.
• Application Number:
  US07/287,752
• Time in Patent Office: 743 Days
• Field of Search: 364/200, 364/300, 364/900
• US Class Current: 709/222
• CPC Class Codes: G06F 2003/0697 device management, e.g. handlers, drivers, I/O schedulers
• CPC Class Codes: G06F 3/0601 Interfaces specially adapted for storage systems

Abstract

This invention relates to assigning disk drives associated with both a host computer and a remote computer coupled together by a communication link using normal DOS driver letters. DOS initialization of the host computer is postponed until a remote session is established with the remote computer and the remote computer provides information regarding the disk drives associated therewith. Upon receiving the disk drive information from the remote computer, the host completes its initialization and assigns drive letters associated with diskette drives associated with the host computer to diskette drives associated with the remote computer. Thus, host diskette drives are logically replaced by remote diskette drives. Any hard disk drives associated with the remote computer are assigned the next available drive letter on the host computer. Thus, the host computer and the remote computers become tightly coupled in that a user of the remote system has access to the diskette drives and any hard disk drives on the remote computer and any hard disk drives on the host computer.

Claims

1. A method of interlocking first and second computer systems coupled by a communication link, said first and said second computer systems each configured with at least one disk drive associated therewith, said method comprises the steps of:

activating an initialization of a first computer system;

transmitting disk drive information by a second computer system to said first computer system;

assigning logical drive assignments to disk drives of said first and second computer systems; and

interlocking said first and second computer systems such that said at least one disk drive of said second computer system performs as if said at least one disk drive is directly attached to said first computer system.

2. The method as recited in claim 1 further includes the step of establishing a session between said first and second computer systems.

3. The method as recited in claim 2 further includes the step of building block device configuration information for said at least one disk drive of said second computer system.

4. The method as recited in claim 3 further includes the step of modifying an autoexec file in said first computer system.

5. The method as recited in claim 4 wherein said first computer includes an operating system program being executed thereon and further includes the step of passing said device configuration information to said operating system program to complete the initialization of said first computer system.

6. The method as recited in claim 5 further includes the steps of:

transmitting display commands to said second computer system by said first computer system; and

receiving keystroke commands by said first computer system from said second computer system.

7. The method as recited in claim 1 wherein said first computer and said second computer each include a plurality of diskette and/or hard disk drives and wherein the assigning step includes the steps of:

assigning letter designations attributable to each diskette drive of said first computer to each respective diskette drive of said second computer;

assigning a next available letter designation of said first computer to each hard disk drive of said second computer; and

transmitting all of said letter designations of said disk drives to said second computer.

8. A system for interlocking first and second computer systems coupled by a communication link, said first and said second computer systems each configured with at least one disk drive, said system comprises:

means for activating an initialization of a first computer system;

means for transmitting disk drive information by a second computer system to said first computer system;

means for assigning responsive to said transmitted disk drive information logical drive assignments to disk drives of said first and second computer systems; and

means for interlocking said first and second computer systems responsive to said logical drive assignments such that said at least one disk drive of said second computer system performs as if said at least one disk drive is directly attached to said first computer system.

9. The system as recited in claim 8 further includes means for establishing a session between said first and second computer systems.

10. The system as recited in claim 9 further includes means for building block device configuration information for said at least one disk drive of said second computer system.

11. The system as recited in claim 10 further includes means for modifying an autoexec file in said first computer system.

12. The system as recited in claim 11 wherein said first computer includes an operating system program being executed thereon and further includes means for passing said block device configuration information to said operating system program to complete the initialization of said first computer system.

13. The method as recited in claim 12 further includes:

means for transmitting display commands to said second computer system by said first computer system; and

means for receiving keystroke commands by said first computer system from said second computer system.

14. The system as recited in claim 8 wherein said first computer and said second computer each include a plurality of diskette and/or hard disk drives and wherein the assigning means includes:

means for assigning letter designations attributable to each diskette disk drive of said first computer to each respective diskette drive of said second computer;

means responsive to assigned letter designations for assigning a next available letter designation of said first computer to each hard disk drive of said second computer; and

means responsive to all assigned letter designations for transmitting all of said letter designations of said disk drives to said second computer.