`
`(19) JAPANESE
`PATENT OFFICE
`(JP)
`(51) Int. Cl.5:
`G06F 3/06
`
`
`
`Identification Codes:
`301 Z
`
`(12) KOKAI TOKUYO PATENT
`JOURNAL (A)
`
`(11) PATENT APPLICATION PUBLICATION
`NO. HEI 5[1993]-181609
`(43) Publication Date: July 23, 1993
`Sequence Nos. for Office Use:
`FI
`Technical Disclosure Section
`7165-5B
`
`
`Examination Request: Not filed
`(21) Filing No.: Hei 4[1992]-333
`
`(22) Filing Date: January 6, 1992
`
`(71) Applicant:
`
`
`
`(72) Inventor:
`
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`(74) Agent:
`
`No. of Claims: 1 (Total of 4 pages)
`000004237
`NEC Corporation
`5-7-1 Minato-ku shiba, Tokyo
`
`Hideo Hirai
`NEC Corporation
`5-7-1 Minato-ku shiba, Tokyo
`
`Tadashi Wakabayashi, patent attorney
`
`(54) Title: PERSONAL COMPUTER SYSTEM
`(57) Abstract
`Objective
`
`To offer a personal computer system that
`allows sharing of multiple magnetic disk devices by
`multiple personal computers.
`
`Structure
`
`It has a magnetic disk sharing device 3
`equipped with a magnetic disk controlling
`mechanism 6 that controls multiple magnetic disk
`devices 8-12 by considering them as 1 virtual
`magnetic disk device with all of their memory
`regions as a memory region, and a partition control
`table 7 that manages and specifies the access right
`of the respective personal computers 1, 2, ···for
`each partition in the memory region of the virtual
`magnetic disk device, and each computer accesses
`the virtual magnetic disk device according to its
`respective access right.
`
`
`[Figure is translated at the end of the document.]
`
`
`
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`
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`Oracle-Huawei-NetApp Ex. 1008, pg. 1
`SUBSTITUTE
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`2
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`Claim
`1. A personal computer system, which is a personal computer system that includes
`
`multiple personal computers and multiple magnetic disk devices, characterized in that
`
`it has a magnetic disk sharing device equipped with a magnetic disk device controlling
`means that controls the aforementioned multiple magnetic disk devices by considering them as 1
`virtual magnetic disk device with all of the memory regions of said multiple magnetic disk
`devices as its memory region, and a security management means that manages the access right of
`the respective aforementioned multiple personal computers in the memory region in said virtual
`magnetic disk device,
`
`and the aforementioned multiple personal computers access the aforementioned virtual
`magnetic disk device according to the aforementioned respective access right.
`
`Detailed explanation of the invention
`[0001]
`Industrial application field
`
`This invention pertains to a personal computer system that includes multiple personal
`computers and multiple magnetic disk devices.
`
`[0002]
`Prior art
`
`A magnetic disk controlling device in a conventional personal computer system can place
`in correspondence only 1 physical magnetic disk device with 1 logical magnetic disk device, and
`this is also true with regard to magnetic disk management of the host software (operation
`system).
`
`[0003]
`
`
`[0004]
`Problems to be solved by the invention
`
`The conventional magnetic disk controlling device described above has a specification
`where only 1 physical magnetic disk device can be placed in correspondence with 1 logical
`magnetic disk device, and there is a disadvantage that an amount of data that exceeds the
`capacity of 1 magnetic disk cannot be handled. There also is a disadvantage that a magnetic disk
`device cannot be shared by multiple personal computers.
`
`
`Magnetic disk devices also cannot be shared by multiple personal computers.
`
`Oracle-Huawei-NetApp Ex. 1008, pg. 2
`SUBSTITUTE
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`3
`
`[0005]
`The objective of this invention is to offer a microcomputer system that has a magnetic
`
`disk controlling device that allows sharing of multiple magnetic disk devices by multiple
`microcomputers by handling data of a size that exceeds the capacity of one magnetic disk device
`by accessing all the memory regions of multiple magnetic disk devices as if the multiple memory
`regions were the memory region in 1 magnetic disk device from individual personal computers
`and managing the access right of individual personal computers.
`
`[0006]
`Means to solve the problems
`
`The personal computer system in this invention has a magnetic disk sharing device
`equipped with a magnetic disk device controlling means that controls multiple magnetic disk
`devices by considering them as 1 virtual magnetic disk device with all of the memory regions of
`these multiple magnetic disk devices as its memory region, and a security management means
`that manages the access right of the respective multiple personal computers in the memory
`region in that virtual magnetic disk device, and multiple personal computers access the virtual
`magnetic disk device according to the respective access right.
`
`[0007]
`Operation
`
`This allows individual personal computers to access all of the memory regions of
`multiple magnetic disk devices as if the memory regions were a memory region of 1 magnetic
`disk device, and the respective access right of the multiple personal computers for that memory
`region in 1 virtual magnetic disk device is specified and managed for each microcomputer.
`
`[0008]
`Application examples
`
`Next, an application example of this invention will be explained while referring to
`figures.
`
`[0009]
`Figure 1 is a block diagram that shows the structure of an application example of a
`
`personal computer system that includes the magnetic disk sharing device in this invention.
`
`
`Oracle-Huawei-NetApp Ex. 1008, pg. 3
`SUBSTITUTE
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`4
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`[0010]
`In Figure 1, personal computers main bodies 1, 2, ···are connected to a magnetic disk
`
`sharing device 3 through interface boards 4, 5, ···. The magnetic disk sharing device 3 is also
`connected to magnetic disk devices 8-12. The magnetic disk sharing device 3 comprises a
`magnetic disk controlling mechanism 6 and a partition control table 7.
`
`[0011]
`An access request from the personal computers 1, 2, ···to the magnetic disk devices 8-12
`
`is notified to the magnetic disk controlling mechanism 6 through the magnetic disk interface
`boards 4, 5, ···, and it is converted to an access request to a virtual magnetic disk device that
`extends over the magnetic disk devices 8-12 in the magnetic disk controlling mechanism 6.
`Through the process above, the magnetic disk devices 8-12 can be handled from the personal
`computer main body as 1 virtual magnetic disk device with all of the memory regions of the
`magnetic disk devices 8-12 as its own [memory] region.
`
`[0012]
`The security management divides the memory region of the virtual magnetic disk device
`
`described above, sets up the access right for each personal computer in each divided part (will be
`referred to as partition), and prevents illegal access. This is implemented by preparing a partition
`control table 7. The access right to a partition includes R (read), W (write), C (create), D (delete),
`and X (execute).
`
`[0013]
`Figure 2 shows an example of a partition control table. A personal computer 1 can read,
`
`write, create, and execute with a partition 1, can read and write with a partition 2, and can read
`with a partition 3. A personal computer 2 can read, write, create, and execute with partition 1,
`and can read with partition 3. A personal computer 3 can read, write, create, and execute with
`partition 1, and can read with partition 2. The aforementioned security management means can
`prevent illegal access for utilization from a personal computer that is not authorized.
`
`[0014]
`Effect of the invention
`
`As explained above, the personal computer system with the magnetic disk sharing device
`in this invention has the effect of handling data in a size that exceeds the memory capacity of 1
`magnetic disk device by accessing all memory regions of multiple magnetic disk devices as if the
`multiple memory regions were the memory region of 1 magnetic disk device from individual
`
`Oracle-Huawei-NetApp Ex. 1008, pg. 4
`SUBSTITUTE
`
`
`
`
`
`personal computers and managing the access right of each personal computer and sharing
`multiple magnetic disk devices by multiple microcomputers for managing data in an aggregate
`instead of storing them in individual personal computers.
`
`Brief description of the figures
`
`Figure 1 is an application example of a personal computer system in this invention.
`
`Figure 2 is an example of a partition control table.
`
`Explanation of symbols
`1
`Personal computer main body 1
`2
`Personal computer main body 2
`3
`Magnetic disk sharing device
`4-5
`Interface boards
`6
`Magnetic disk controlling mechanism
`7
`Partition control table
`8-12 Magnetic disk devices
`
`
`
`Key: 1
`
`2
`
`3
`
`Figure 1
`
`Computer 1
`Computer 2
`Magnetic disk sharing device
`
`5
`
`
`
`Oracle-Huawei-NetApp Ex. 1008, pg. 5
`SUBSTITUTE
`
`
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`6
`
`I/F board
`4
`I/F board
`5
`Magnetic disk controlling mechanism
`6
`Partition control table
`7
`Magnetic disk device A
`8
`Magnetic disk device B
`9
`10 Magnetic disk device C
`11 Magnetic disk device D
`12 Magnetic disk device E
`
`Partition
`Partition 1
`
`
`
`Partition 2
`
`Partition 3
`
`Partition n
`
`Access right
`RWCX
`RWCX
`RWCX
`RW
`R
`R
`R
`
`
`Computer name
`Personal computer 1
`Personal computer 2
`Personal computer 3
`Personal computer 1
`Personal computer 3
`Personal computer 1
`Personal computer 2
`.
`.
`.
`.
`.
`.
`.
`.
`(R: Readable, W: Writable, C: Creatable, X: Executable)
`Figure 2
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`Oracle-Huawei-NetApp Ex. 1008, pg. 6
`SUBSTITUTE
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`(57)ãèŠçŽã
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`SUBSTITUTE
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`Oracle-Huawei-NetApp Ex. 1008, pg. 8
`SUBSTITUTE
`
`
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`3
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