WO2004053846A3 - Emulated read-write disk drive using a protected medium - Google Patents

Emulated read-write disk drive using a protected medium Download PDF

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Publication number
WO2004053846A3
WO2004053846A3 PCT/US2003/038295 US0338295W WO2004053846A3 WO 2004053846 A3 WO2004053846 A3 WO 2004053846A3 US 0338295 W US0338295 W US 0338295W WO 2004053846 A3 WO2004053846 A3 WO 2004053846A3
Authority
WO
WIPO (PCT)
Prior art keywords
read
disk drive
write
hard disk
file
Prior art date
Application number
PCT/US2003/038295
Other languages
French (fr)
Other versions
WO2004053846A2 (en
Inventor
John Alan Hensley
Original Assignee
John Alan Hensley
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by John Alan Hensley filed Critical John Alan Hensley
Priority to AU2003298820A priority Critical patent/AU2003298820A1/en
Publication of WO2004053846A2 publication Critical patent/WO2004053846A2/en
Publication of WO2004053846A3 publication Critical patent/WO2004053846A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0662—Virtualisation aspects
    • G06F3/0664—Virtualisation aspects at device level, e.g. emulation of a storage device or system
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/062—Securing storage systems
    • G06F3/0623—Securing storage systems in relation to content
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device
    • G06F3/0674—Disk device
    • G06F3/0677—Optical disk device, e.g. CD-ROM, DVD

Abstract

A read-write hard disk drive is emulated using a hard disk drive image file on a protected medium such as a CD-ROM, a written disk sector database (132), and file system filters (128 & 136) . A file system filter (128) intercepts file I/O requests from the operating system (126) read requests are serviced from the hard disk drive image file (130). Write operations are directed to a database (132), such as in RAM. Subsequent read requests for previously written data are serviced from the database (132). Another file system filter(136) monitors attempts to alter the file access attributes, and prevents pre-existing read-only files on the emulated drive from being written or deleted. The maximum size of the written disk sector database is the sum of sectors on the hard disk drive image file allocated (138) to read-write files and free space. The emulated read-write hard disk drive (134) allows for the execution of programs requiring a read-write native media.
PCT/US2003/038295 2002-12-10 2003-12-03 Emulated read-write disk drive using a protected medium WO2004053846A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003298820A AU2003298820A1 (en) 2002-12-10 2003-12-03 Emulated read-write disk drive using a protected medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/315,797 US6999913B2 (en) 2002-12-10 2002-12-10 Emulated read-write disk drive using a protected medium
US10/315,797 2002-12-10

Publications (2)

Publication Number Publication Date
WO2004053846A2 WO2004053846A2 (en) 2004-06-24
WO2004053846A3 true WO2004053846A3 (en) 2005-01-06

Family

ID=32468801

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/038295 WO2004053846A2 (en) 2002-12-10 2003-12-03 Emulated read-write disk drive using a protected medium

Country Status (3)

Country Link
US (1) US6999913B2 (en)
AU (1) AU2003298820A1 (en)
WO (1) WO2004053846A2 (en)

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Also Published As

Publication number Publication date
US20040111250A1 (en) 2004-06-10
WO2004053846A2 (en) 2004-06-24
US6999913B2 (en) 2006-02-14
AU2003298820A1 (en) 2004-06-30

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