CA2270698A1 - Method of indexing data on a sequential data storage medium - Google Patents
Method of indexing data on a sequential data storage medium Download PDFInfo
- Publication number
- CA2270698A1 CA2270698A1 CA 2270698 CA2270698A CA2270698A1 CA 2270698 A1 CA2270698 A1 CA 2270698A1 CA 2270698 CA2270698 CA 2270698 CA 2270698 A CA2270698 A CA 2270698A CA 2270698 A1 CA2270698 A1 CA 2270698A1
- Authority
- CA
- Canada
- Prior art keywords
- data
- storing
- file
- medium
- field
- 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
Links
Landscapes
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
A format structure for storing retrievable encoded data on a recording medium comprises a start field for indicating the start of a data file, an index field immediately following the start field for storing indexing data respecting the data file, the index field storing a sequence of one or more positions of other start fields leading in one direction from a current position on the medium toward one end of the medium, and a field immediately following the index field for storage data which forms the data file. A method for storing encoded data on a storage medium comprises the steps of locating the last file stored on the medium, retrieving the index field of the last stored file, duplicating the index field, moving to the end of the last stored file, inserting a filemark at the current position of the medium, inserting into a final leaf block a new entry containing the entry key of the new file and the current position of the medium, storing the indexing data immediately following the filemark, and storing the encoded data immediately following the indexing data.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2270698 CA2270698C (en) | 1998-07-31 | 1999-04-29 | Method of indexing data on a sequential data storage medium |
| CA002279759A CA2279759C (en) | 1999-04-29 | 1999-07-30 | Drive names |
| US09/364,074 US6370545B1 (en) | 1999-04-29 | 1999-07-30 | Method of accessing removable storage media |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2,244,626 | 1998-07-31 | ||
| CA002244626A CA2244626A1 (en) | 1998-07-31 | 1998-07-31 | A hardware and software system |
| US09/267,788 US6349294B1 (en) | 1998-07-31 | 1999-03-15 | Method of determining and storing indexing data on a sequential data storage medium for supporting random access of data files stored on the medium |
| US09/267,788 | 1999-03-15 | ||
| CA 2270698 CA2270698C (en) | 1998-07-31 | 1999-04-29 | Method of indexing data on a sequential data storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2270698A1 true CA2270698A1 (en) | 2000-01-31 |
| CA2270698C CA2270698C (en) | 2003-07-01 |
Family
ID=27170778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2270698 Expired - Lifetime CA2270698C (en) | 1998-07-31 | 1999-04-29 | Method of indexing data on a sequential data storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2270698C (en) |
-
1999
- 1999-04-29 CA CA 2270698 patent/CA2270698C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2270698C (en) | 2003-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20190429 |