CA2394909A1 - Data storage - Google Patents

Data storage Download PDF

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Publication number
CA2394909A1
CA2394909A1 CA002394909A CA2394909A CA2394909A1 CA 2394909 A1 CA2394909 A1 CA 2394909A1 CA 002394909 A CA002394909 A CA 002394909A CA 2394909 A CA2394909 A CA 2394909A CA 2394909 A1 CA2394909 A1 CA 2394909A1
Authority
CA
Canada
Prior art keywords
data
regenerated
disk
written
derived
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002394909A
Other languages
French (fr)
Other versions
CA2394909C (en
Inventor
Raju C. Bopardikar
Adrian R. Braine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autodesk Canada Co
Original Assignee
Individual
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
Priority claimed from GBGB9619120.0A external-priority patent/GB9619120D0/en
Application filed by Individual filed Critical Individual
Priority claimed from CA002202725A external-priority patent/CA2202725C/en
Publication of CA2394909A1 publication Critical patent/CA2394909A1/en
Application granted granted Critical
Publication of CA2394909C publication Critical patent/CA2394909C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

Video data in the form of a plurality of digitised frames, is stored on a plurality of magnetic disks. Each image frame is striped across a plurality of disks and redundant parity information, derived from the stripes, is written to an additional disk. Disk failure is detected and in response to this detection missing data is regenerated from the parity information. This allows the transfer of video data in real time to be maintained for output so that the system remains operational. While data is being read in real time, derived from regenerated data, the regenerated data is written to an operational disk, thereby reprotecting the data in the event of a subsequent failure. Frame supplied to output are labelled as being protected or unprotected and application programs may respond to this status information as considered appropriate.
CA002394909A 1996-04-15 1997-04-15 Data storage Expired - Fee Related CA2394909C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US1546896P 1996-04-15 1996-04-15
US60/015,468 1996-04-15
GBGB9619120.0A GB9619120D0 (en) 1996-09-12 1996-09-12 Data storage
GB9619120.0 1996-09-12
CA002202725A CA2202725C (en) 1996-04-15 1997-04-15 Video storage

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002202725A Division CA2202725C (en) 1996-04-15 1997-04-15 Video storage

Publications (2)

Publication Number Publication Date
CA2394909A1 true CA2394909A1 (en) 1997-10-15
CA2394909C CA2394909C (en) 2006-06-13

Family

ID=27170337

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002394909A Expired - Fee Related CA2394909C (en) 1996-04-15 1997-04-15 Data storage

Country Status (1)

Country Link
CA (1) CA2394909C (en)

Also Published As

Publication number Publication date
CA2394909C (en) 2006-06-13

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed