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`DRAWINGS
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`CLAIMS ALLOWED
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`~ER~NAL I
`DISCLAIMER
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`09/qr.,~ 335
`D The term of this patent
`subsequent to
`has been disclaimed.
`~e term of this patent shall
`not extend beyond tha expiration date
`of U.S Patent. No.5, <it/It 7 7 2-
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`PRIMARY· EXAMINER
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`_ ~ogal lnBtr,mcnts Examiner)
`
`(DQtu)
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`Total Claims
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`/
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`NOTICE OF ALLOWANCE MAILED
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`WARNING:
`The Information disclosed herein may be restricted. Unau1horlzed dlsclosura may be prohibited by tha Unltad States Code Tltla 35, Sactlons 122, 181 and 388.
`Posaeselon ou1slde tha U.S. Patent & Tradam&rk Oflloe Is restrlctad to &uthorlzed employees ~~nd oontraotors only.
`
`Form PT0·436A
`(Rov. 6/99)
`
`FILED WITH: D DISK (CRF) DFICHE 0 CD-RO~'
`
`(Attached In poci<ut on right Inside fie~
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`(FACE)
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`Oracle/Dot Hill Ex. 1002, pg. 1
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`Oracle/Dot Hill Ex. 1002, pg. 2
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`I
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`INDEX OF CLAIMS
`., ........... , ................... Rejected
`N ................................. Non-elected
`I ................................. Interference
`·······:·························Allowed
`A .......... , ...................... Appeal
`(Through numeral) ... Canceled
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`84
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`87
`88
`89
`90
`91
`92
`93
`94
`95
`96
`97
`9e
`99
`10C
`
`If more than 150 claims or 1 0 actions
`staple additional sheet here
`
`(LEFT INSIDE)
`
`Date
`
`Claim
`ro
`<:
`·;:;,
`"iii
`c:
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`101
`102
`103
`104
`105
`106
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`108
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`114
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`116
`117
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`20
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`22
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`124
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`~26
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`128
`~29
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`39
`40
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`45
`46
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`
`Oracle/Dot Hill Ex. 1002, pg. 4
`
`

`
`------ · - - - - - - - - - - - - - - - - - -
`
`- - - - - · - - - · · - · - - - - · -
`
`PATENT APPUCATION SERIAL NO . - - - - - - - -
`
`U.S. DEPARTMENT OF COMMERCE
`PATENT AND TRADEMARK OFFICE
`FEE RECORD SHEET
`
`l0/02/2001 ABDDNEl 00000024 099&5335
`710.00 OP
`01 FCl101
`
`PT0-1556
`(5/87)
`
`'U.S. GPO: 2000-468-987/395g5
`
`_____ .)
`
`Oracle/Dot Hill Ex. 1002, pg. 5
`
`

`
`Pag<.e 1 of 1
`
`COMMISSIONI!:I'I FOI'I' PATI!:NTS
`UNITW STATI!:S PATI!:NT AND TRADI!:MARK Oi'"i'"ICE:
`WASHINGTON, D.C. 20231
`www. uspl<;>.gov
`
`CONFIRMATION NO. 3446
`
`I~~~ IIIII~IIRIIIIIIIIU ~~ 1111 ~ll~~ ~~ ~10 i Ul
`
`Bib Data Sheet
`!
`
`SERIAL NUMBER
`09/965,335
`/~"
`
`FILING DATE
`09~27/2001
`.ROLE
`:..-
`
`CLASS
`710
`
`GROUP ART UNIT
`2182
`
`ATTORNEY
`DOCKET NO.
`CROSS1120.-3
`
`~PPLICAf\ITS
`. ..-Oti"offrey B. Hoese, Austin, TX;
`Jeffry T. Russell, Cibolo, TX;
`
`i"* CONTINUING DATA************~*"'
`c.-v
`
`"FOREIGN APPLICATIONS********************
`
`THIS APPLICATION IS A CON OF 09/354,682 07/15/1999
`WHICH IS A CON OF 09/001,79912/31/1997 P.AtT 5,941,972
`
`IF REQUIRED, FOREIGN FILING LICENSE GRANTED
`•• 10/11/2001
`/1
`
`0
`'
`r7f
`orelgn Priority claimed
`yes~ ·
`~5 USC 119 (a-d) conditions ~DMetafter
`rlet
`ilferified and
`~cknowledged
`~DDRESS
`~5094
`
`Examiner's Signature
`
`Initials
`
`STATE OR
`COUNTRY
`TX
`
`SHEETS
`DRAWING
`2
`
`TOTAL
`CLAIMS
`14
`
`INDEPENDENT
`CLAIMS
`3
`
`TITLE
`s-t.&'~~e router and method for providing virtu~llocal storage
`
`FILING FEE FEES: Authority has been given in Paper
`RECEIVED No.
`to.charge/credit DEPOSIT ACCOUNT
`No.
`710
`for following:
`
`· -
`
`lo All F~es
`10 1.16 F~es (Filing)
`0 1.17 Fees ( Processing Ext. of
`time)
`ID 1.18 Fees (Issue~
`I[J Other
`
`.0 Credit
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`I
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`I
`
`I
`
`I
`
`Oracle/Dot Hill Ex. 1002, pg. 6
`
`

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`Please type a plus sign (+)Inside this box
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`UTILITY
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`APPLICATION ELEMENTS
`See MPEP chapter 600 concsrnlng utility patent application contents.
`
`PTO/SD/05 (2/98) A
`
`Attorney Docket No .
`
`I
`
`First Inventor or App/icetlon Identifier
`
`Title
`
`CROSS1120-3
`I
`Geoffrey B. Hoese, et Clb
`~
`Storage Router and Method for Providing Vlrtuat:~
`LocaiStorage
`m~
`::i.~
`Express Mail Labs/ No .
`~g
`Box Patent Application
`Assistant Commissioner for Patent~U
`Washlna:ton, D.C. 20231
`'!""I
`
`l EL911432960US
`ADDRESS TO:
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`6. O Microfiche Computer Program (Appendix)
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`I 28
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`25094
`REGISTRATION :h 35,066
`jkt;61
`
`PATENT _T~LIARK OFFICE
`
`Date
`
`Oracle/Dot Hill Ex. 1002, pg. 7
`
`

`
`FEE TRANSMITTAL
`for FY 2001
`
`TOTAL AMOUNT 6F PAYMENT
`
`1 ~ 11o.oo
`
`Application Number
`Filing Date
`
`First Named Inventor
`Examiner Name
`Group I Art Unit
`Attorney Docket No.
`
`te if Known
`Co.
`Unknown
`September 27, 2001
`Geoffrey B. Hoese, et al.
`Unknown
`Unknown
`CROSS1120-3
`
`PTO/SB/ 17 ( 11/00)
`
`METHOD OF PAYMENT jcheck on~)
`
`1.
`
`Indicated fees and credit any over payments to:
`
`Number
`
`Name
`
`50-D456
`
`I
`
`§§ 1.16 and 1.17
`Payment Enclosed:
`
`D The Commissioner Is hereby authorized to charge
`Deposit Account I
`Deposit Account I
`Gray Cary Ware & Freldenrlch LLP
`CKJ Charge Any Additional Fee Required Under 37 CFR
`2. 0
`n Money Order n
`0
`
`Check
`
`Other
`
`FEE CALCULATION
`
`1. BASIC FILING FEE
`
`Small Entity
`
`FEE CALCULATION (continued)
`3. ADDITIONAL FEES
`Large Entity
`Small Entity
`Code
`$
`$
`
`Fee Description
`
`I Code
`I 105
`
`127
`
`147
`
`112
`
`113
`
`115
`
`116
`
`Surchrg - late filing fee or
`oath
`Surcharge - late provisional
`filing fee or cover sheet
`Filing a request for
`reexamination
`Request publication of SIR
`prior to Examiner action
`
`130
`
`50
`
`2520
`
`920*
`
`205
`
`227
`
`147
`
`112
`
`65
`
`25
`
`2520
`
`920*
`
`1840*
`
`113
`
`1840*
`
`110
`
`55
`
`215
`
`216
`
`Fee
`Paid
`
`I
`I
`I
`I
`
`::large Entity
`
`~~ode
`
`$
`
`Code
`
`$
`
`Fee Description
`
`Fee Paid
`
`117
`
`:~01
`.Moe
`
`710
`
`201
`
`310
`
`206
`
`480
`
`207
`
`690
`
`208
`
`150
`
`214
`
`240 Plant Filing Fee
`
`119
`
`120
`
`355 Utility Filing Fee ~ 118
`155 Design Filing Fee D
`D
`345 Reissue Filing Fee D
`75 Provisional Filing Fee D
`
`121
`
`138
`
`140
`
`Request publication of SIR
`prior to Examiner action
`Extension for reply within first
`month
`Extension for reply within
`second month
`Extension for reply within third
`month
`Extension for reply within
`fourth month
`Notice of Appeal
`
`Filing a brief In support of
`appeal
`Request for oral hearing
`
`proceeding
`
`380
`
`870
`
`1360
`
`300
`
`300
`
`260
`
`1510
`
`110
`
`217
`
`218
`
`219
`
`220
`
`221
`
`138
`
`190
`
`435
`
`680
`
`150
`
`150
`
`130
`
`1510
`
`55
`
`,1107
`,11
`,no a
`:~14
`110
`SUBTOTAL (1)
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`1:::1
`l•~laims
`
`14
`
`I
`I
`
`I -20
`I -3
`
`Ind. Clms
`
`3
`Multiple Dependent Claims
`
`Large Entity
`
`Small Entity
`
`Code
`
`Code
`
`$
`
`~~ I
`
`r<$)71o.oo
`
`Extra
`Claims X
`
`0
`
`0
`
`I
`I
`I
`
`Fee
`from Fee
`below=
`Paid
`.o
`
`0
`
`0
`
`II
`II
`II
`
`II
`II
`II
`
`0
`
`141
`
`142
`
`I 143
`I 144
`I 122
`
`123
`
`1210
`
`1240
`
`430
`
`580
`
`130
`
`50
`
`240
`
`241
`
`242
`
`243
`
`244
`
`122
`
`123
`
`605
`
`620
`
`215
`
`290
`
`130
`
`50
`
`Utility issue fee (or reissue)
`
`Design Issue fee
`
`Plant Issue fee
`
`.
`
`Petitions to the Commissioner
`
`c:=J
`c:=J
`c:=J
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`Petition to Institute a public use c=J
`Petition to revive: unavoidable c:=J
`Petition to revive: unintentional c:J
`c=J
`c:=J
`c:=J
`I
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`Petitions related to provisional I
`I
`applications
`Submission of Information
`I
`I
`Disclosure Statement
`Recording each patent
`L:J
`assignment per property
`Filing a submission after final
`I
`I
`rejection (37 CFR § 1.129(a))
`Each addltlonallnvenlfon to be
`examined (37 CFR § 1.129(b)) I
`I
`c:=J
`I
`I
`
`J($)
`
`Reissue lndep. claims over
`original patent
`9 Reissue claims In excsss of 20 Other fee (specify)
`and over original patent
`SUBTOTAL (2)
`
`[($)
`
`*Reduced by Basic Filing Fee Paid SUBTOTAL {3)
`
`$
`
`18
`
`80
`
`260
`
`78
`
`18
`
`103
`
`102
`
`104
`
`109
`
`110
`
`Fee Description
`
`9 Claims In excess of 20
`
`40
`
`lndep. claims In excess of 3
`
`130 Multiple dependent claim
`
`203
`
`202
`
`204
`
`126
`
`581
`
`146
`
`149
`
`240
`
`40
`
`690
`
`690
`
`126
`
`581
`
`246
`
`249
`
`240
`
`40
`
`345
`
`345
`
`39
`
`Other fee (specify)
`
`209
`
`210
`
`SUBMinED ElY CUSTOMER NO, 2~;
`Name
`MarW, l}errier
`Signature
`
`f<-/'d/7 :1-
`/
`
`.::::=:---
`
`Registration No.
`•
`
`-
`
`J35,066
`
`Complete (If a JPiicabie)
`Telephone
`(512) 457-7016
`Date
`September 27,2001
`
`Oracle/Dot Hill Ex. 1002, pg. 8
`
`

`
`UNITED STATES PATENT AND TRADEMARK OFFICE
`DOCUMENT CLASSIFICATION BARCODE SHEET
`
`'
`
`11111111111111111111111111111111111111111111111111
`
`As-Filed N w A plication
`
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`I
`'
`I
`
`Oracle/Dot Hill Ex. 1002, pg. 9
`
`

`
`ATTORNEYS DOCKET
`064113.0103
`
`PATENT APPLICATION
`
`1
`
`STORAGE ROUTER AND METHOD FOR
`
`PROVIDING VIRTUAL LOCAL STORAGE
`
`TECHNICAL FIELD OF THE INVENTION
`
`This invention relates in general to network storage
`
`devices, and more particularly to a storage router and
`
`method for providing virtual local storage on remote SCSI
`
`5
`
`storage devices to Fibre Channel devices.
`
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`
`Oracle/Dot Hill Ex. 1002, pg. 10
`
`

`
`ATTORNEYS DOCKET
`064113.0103
`
`BACKGROUND OF THE INVENTION
`
`2
`
`PATENT APPLICATION
`
`I":J "
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`Typical storage transport mediums provide for a
`
`relatively small number of devices to be attached over
`
`relatively short distances. One such transport medium 1s
`
`5
`
`a Small Computer System Interface (SCSI) protocol, the
`
`structure and operation of which is generally well known
`
`as is described, for example, in the SCSI-1, SCSI-2 and
`
`SCSI-3 specifications. High speed serial interconnects
`
`provide enhanced capability to attach a large number of
`
`10
`
`high speed devices to a common storage transport medium
`
`over large distances. One such serial interconnect 1s
`
`Fibre Channel, the structure and operation of which is
`
`described, for example, in Fibre Channel Physical and
`
`Signaling Interface (FC-PH), ANSI X3.230 Fibre Channel
`
`15
`
`Arbitrated Loop (FC-AL), and ANSI X3.272 Fibre Channel
`
`Private Loop Direct Attach (FC-PLDA).
`
`Conventional computing devices, such as computer
`
`workstations, generally access storage locally or through
`
`network interconnects. Local storage typically consists
`
`20
`
`of a disk drive, tape drive, CD-ROM drive or other
`
`storage device contained within, or locally connected to
`
`the workstation. The workstation provides a file system
`
`structure, that includes security controls, with access
`
`to the local storage device through native low level,
`
`25
`
`block protocols. These protocols map directly to the
`
`.~--'
`
`mechanisms used by the storage device and consist of data
`
`requests without security controls. Network interconnects
`
`typically provide access for a large number of computing
`
`AUS01:110067
`
`)
`
`)
`
`Oracle/Dot Hill Ex. 1002, pg. 11
`
`

`
`ATTORNEYS DOCKET
`064113.0103
`
`PATENT APPLICATION
`
`3
`
`devices to data storage on a remote network server. The
`
`remote network server provides file system structure,
`
`access control/ and other miscellaneous capabilities that
`
`include the network interface. Access to data through
`
`5
`
`the network server is through network protocols that the
`
`server must translate into low level requests to the
`
`storage device. A workstation with access to the server
`
`storage must translate its file system protocols into
`
`network protocols that are used to communicate with the
`
`server. Consequently/ from the perspective of a
`
`workstation/ or other computing device, seeking to access
`
`such server data 1
`
`the access is much slower than access
`
`to data on a local storage device.
`
`10
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`
`Oracle/Dot Hill Ex. 1002, pg. 12
`
`

`
`·r .• :.,
`
`ATTORNEYS DOCKET
`064113.0103
`
`SUMMARY OF THE INVENTION
`
`4
`
`PATENT APPLICATION
`
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`In accordance with the present invention, a storage
`
`router and method for providing virtual local storage on
`
`remote SCSI storage devices to Fibre Channel devices are
`
`5
`
`disclosed that provide advantages over conventional
`
`network storage devices and methods.
`
`According to one aspect of the present invention, a
`
`storage router and storage network provide virtual local
`
`storage on remote SCSI storage devices to Fibre Channel
`
`10
`
`devices. A plurality of Fibre Channel devices, such as
`
`workstations, are connected to a Fibre Channel transport
`
`m~dium, and a plurality of SCSI strirage devices are
`
`connected to a SCSI bus transport medium. The storqge
`
`router interfaces between the Fibre channel transport
`
`15
`
`medium and the SCSI bus transport medium. The storage
`
`router maps between the workstations and the SCSI storage
`
`devices and implements access controls for storage space
`
`on the SCSI storage devices. The storage router then
`
`allows access from the workstations to the SCSI storage
`
`20
`
`devices using native low level, block piot?col in
`
`accordance with the mapping and the access controls.
`
`According to another aspect of the present
`
`invention, virtual local storage on remote SCSI storage
`
`devices is provided to Fibre Channel devices. A Fibre
`
`25
`
`Channel transport medium and a SCSI nus transport medium
`
`are interfaced with. A configuration is maintained for
`
`SCSI storage devices connected to the SCSI bus transport
`
`medium. The configuration maps between Fibre Channel
`
`AUSOl;ll00~7
`
`(
`
`J
`
`)
`
`Oracle/Dot Hill Ex. 1002, pg. 13
`
`

`
`ATTORNEYS DOCKET
`064113.0103
`
`PATENT APPLICATION
`
`5
`
`devices and the SCSI storage devices and implements
`
`access controls for storage space on the SCSI storage
`
`devices. Access is then allowed from Fibre Channel
`
`initiator devices to SCSI storage devices using native
`
`5
`
`low level, block protocol in accordance with the
`
`configuration.
`
`A technical advantage of the present invention is
`
`the ability to centralize local storage for networked
`
`workstations without any cost of speed or overhead. Each
`
`10
`
`workstation access its virtual local storage as if it
`
`work locally connected. Further, the centralized storage
`
`devices can be located in a significantly remote position
`
`even in excess of ten kilometers as defined by Fibre
`
`Channel standards.
`
`15
`
`Another technical advantage of the present invention
`
`is the ability to centrally control and administer
`
`storage space for connected users without limiting the
`
`speed with which the users can access local data.
`
`In
`
`addition, global access to data, backups, virus scanning
`
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`and redundancy can be more easily accomplished by
`
`centrally located storage devices.
`
`A further technical advantage of the p~esent
`
`invention is providing support for SCSI storage devices
`
`as local storage for Fibre Channel hosts.
`
`In addition,
`
`25
`
`the present invention helps to provide extended
`
`capabilities for Fibre Channel and for management of
`
`storage subsystems.
`
`AUSOl:ll0067
`
`( /\
`
`I '
`
`Oracle/Dot Hill Ex. 1002, pg. 14
`
`

`
`ATTORNEYS DOCKET
`064113.0103
`
`PATENT APPLICATIQN
`
`6
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`A more complete understanding of the present
`
`invention and the advantages thereof may be acquired by
`
`referring to the following description taken in
`
`5
`
`conjunction with the accompanying drawings, in which like
`
`reference numbers indicate like features, and wherein:
`
`FIGURE 1 is a block diagram of a conventional
`
`network that provides storage through a network server;
`
`FIGURE 2 is a block diagram of one embodiment of a
`
`10
`
`storage network with a storage router that provides
`
`global access and routing;
`
`FIGURE 3 is a block diagram of one embodiment of a
`
`storage network with a storage router that provides,,
`
`virtual local storage;
`
`15
`
`FIGURE 4 is a block diagram of one embodiment of the
`
`storage router of FIGURE 3; and
`
`FIGURE 5 is a block diagram of one embodiment of
`
`data flow within the storage router of FIGURE 4.
`
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`Oracle/Dot Hill Ex. 1002, pg. 15
`
`

`
`ATTORNEYS DOCKET
`064113.0103
`
`PATENT APPLICATION
`
`7
`
`DETAILED DESCRIPTION OF THE INVENTION
`
`F~GURE 1 is a block diagram of a conventional
`
`network, indicated generally at 10, that provides access
`
`to storage through a network server. As shown, network
`
`5
`
`10 includes a plurality of workstations 12 interconnected
`
`with a network server 14 via a network transport medium
`
`16. Each workstation 12 can generally comprise a
`
`processor, memory, input/output devices, storage devices
`
`and a network adapter as well as other common computer
`
`components. Network server 14 uses a SCSI bus 18 as a
`
`storage transport medium to interconnect with a plurality
`
`of storage devices 20 (tape drives, disk drives, etc.).
`
`In the embodiment of FIGURE 1, network transport medium
`
`16 is an network connection and storage devices 20
`
`comprise hard disk drives, although there are numerous
`
`alternate transport mediums and storage devices.
`
`In network 10, each workstation 12 has access to its
`
`local storage device as well as network access to data on
`
`storage devices 20. The access to a local storage device
`
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`
`is typically through native low level, block protocols.
`
`On the other hand, access by a workstation~12 to storage
`
`devices 20 requires the participation of network server
`
`14 which implements a file system and transfers data to
`
`workstations 12 only through high level file system
`
`25
`
`protocols. Only network server 14 communicates with
`
`storage devices 20 via native low level, block protocols.
`
`Consequently, the network access by workstations 12
`
`through network server 14 is slow with respect to their
`
`AUS0l:ll0067
`
`Oracle/Dot Hill Ex. 1002, pg. 16
`
`

`
`ATTORNEYS DOCKET
`064113.0103
`
`PATENT APPLICATION
`
`8
`
`access to local storage.
`
`In network 10, it can Also be a
`
`logistical problem to centrally manage and administer
`
`local data distributed across an organization, including
`
`accompli~hing tasks such as backups, virus scanning and
`
`5
`
`redundancy.
`
`FIGURE 2 is a block diagram of one embodiment of a
`
`storage network, indicated generally at 30, with a
`
`storage router that provides global access and routing.
`
`This environment is significantly different from that of
`
`10
`
`FIGURE 1 in that there is no network server involved.
`
`In
`
`FIGURE 2, a Fibre Channel high speed serial transport 32
`
`interconnects a plurality of workstations 36 and storage
`
`devices 38. A SCSI bus storage transport medium
`
`interconnects workstations 40 and storage devices 42. A
`
`15
`
`storage router 44 then serves to interconnect these
`
`mediums and provide devices on either medium global,
`
`transparent access to devices on the other medium.
`
`Storage router 44 routes requests from initiator devices
`
`on one medium to target devices on the other medium and
`
`20
`
`routes data between the target and the initiator.
`
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`Storage router 44 can allow initiators and targets to be
`
`on either side.
`
`In this manner, storage router 44
`
`enhances the functionality of Fibre Channel 3~ by
`
`providing access, for example, to leQacy SCSI storage
`
`25
`
`devices on SCSI bus 34.
`
`In the embodiment of FIGURE 2,
`
`.. :-__ ,·
`
`the operation of storage router 44 can be managed by a
`
`management station 46 connected to the storage router via
`
`a direct serial connection.
`
`AUSOl:ll0067
`
`C~
`
`Oracle/Dot Hill Ex. 1002, pg. 17
`
`

`
`ATTORNEYS DOCKET
`064113.0103
`
`PATENT APPLICATION
`
`9
`
`In storage network 30, any workstation 36 or
`
`workst~tion 40 can access any storage device 38 or
`
`storage device 42 through native low level, block
`
`protocols, and vice versa. This functionality 1s enabled
`
`5
`
`by storage router 44 which routes requests and data as a
`
`generic transport between Fibre Channel 32 and SCSI bus
`
`34. Storage router 44 uses tables to map devices from
`
`one medium to the other and distributes requests and data
`
`across Fibre Channel 32 and SCSI bus 34 without any
`
`10
`
`security access controls. Although this extension of the
`
`high speed serial interconnect provided by Fibre Channel
`
`32 is beneficial, it is desirable to provide security
`
`controls in addition to extended access to storage
`
`II
`
`devices through a native low level, block protocol.
`
`15
`
`FIGURE 3 is a block diagram of one embodiment of a
`
`storage network, indicated generally at 50, with a
`
`stoiage router that provides virtual local storage.
`
`Similar to that of FIGURE 2, storage network 50 includes
`
`a Fibre Channel high speed serial interconnect 52 and a
`
`20
`
`SCSI bus 54 bridged by a storage router 56. Storage
`
`router 56 of FIGURE 3 provides for a large number of
`
`~
`
`workstations 58 to be interconnected on a common storage
`
`transport and to access common storage devices 60, 62 and
`
`64 through native low level, block protocols.
`
`25
`
`According to the present invention, storage router
`
`~-
`
`56 has enhanced functionality to implement security
`
`controls and routing such that each workstation 58 can
`
`have access to a specific subset of the overall data
`
`AUS01:110067
`
`Oracle/Dot Hill Ex. 1002, pg. 18
`
`

`
`ATTORNEYS DOCKET
`064113.0103
`
`PATENT APPLICATION
`
`10
`
`stored ln storage devices 60, 62 and 64. This specific
`
`subset of data has the appearance and characteristics of
`
`local storage and is referred to herein as virtual local
`
`storage. Storage router 56 allows the configuration and
`
`5
`
`modifica~ion of the storage allocated to each attached
`
`workstation 58 through the use of mapping tables or other
`
`mapping techniques.
`
`As shown in FIGURE 3, for example, storage device 60
`
`can be configured to provide global dat~ 65 which can be
`
`accessed by all workstations 58. Storage device 62 can
`
`be configured to provide partitioned subsets 66, 68, 70
`
`and 72, where each partition is allocated to one of the
`workstations 58 (workstations A, B, c and D). These
`subsets 66, 68, 70 and 72 can only be accessed by the
`
`15
`
`associated workstation 58 and appear to the associated
`
`workstation 58 as local storage accessed using native low
`
`level, block protocols. Similarly, storage device 64 can
`
`be allocated as storage for the remaining workstation 58
`
`(workstation E) .
`
`20
`
`Storage router 56 combines access control with
`
`routing such that each workstation 58 has tontrolled
`
`access to only the specified partition of storage device
`
`62 which forms virtual local storage for the workstation
`
`58. This access control allows security control for the
`
`25
`
`specified data partitions. Storage router 56 allows this
`
`allocation of storage devices 60, 62 and 64 to be managed
`
`by a management station 76. Management station 76 can
`
`connect directly to storage router 56 via a direct
`
`AUS01t110067
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`\\
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`Oracle/Dot Hill Ex. 1002, pg. 19
`
`

`
`ATTORNEYS DOCKET
`064113.0103
`
`PATENT APPLICATION
`
`11
`
`connection or, alternately, can interface with storage
`
`router 56 through either Fibre Channel 52 or SCSI bus 54.
`
`In the latter case, management station 76 can be a
`
`workstation or other computing device with special rights
`
`5
`
`such that storage router 56 allows access to mapping
`
`tables and shows storage devices 60, 62 and 64 as they
`
`exist physically rather than as they have been allocated.
`
`The environment of FIGURE 3 extends the concept of a
`
`single workstation having locally connected storage
`
`10
`
`devices to a storage network 50 in which workstations 58
`
`are provided virtual local storage in a manner
`
`transparent to workstations 58. Storage router 56
`
`provides centralized control of what each workstati9n 58
`
`sees as its local drive, as well as what data it sees as
`
`15
`
`global data accessible by other workstations 58.
`
`Consequently, the storage space considered by the
`
`workstation 58 to be its local storage is actually a
`
`partition (i.e., logical storage definition) of a
`
`physically remote storage device 60, 62 or 64 connected
`
`20
`
`through storage router 56. This means that similar
`
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`requests from workstations 58 for acce