Data Structure For Control Information On Data Storage Media
a data structure and data storage technology, applied in the field of data storage media, can solve the problems of inability to accommodate new features with backward compatibility, standard affecting change, etc., and achieve the effect of ensuring the reliability of dcb
Inactive Publication Date: 2007-07-05
WEIRAUCH CHARLES R +1
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
"The invention provides a flexible and standardized data structure for recording administration and control information for a rewriteable storage medium, regardless of the manufacturer. This data structure, called the Disk Control Block (DCB), includes information such as a counter, formatting information, and power calibration information. The DCB also includes a control block identifier and an area called Unknown Content Descriptor Actions (UCDA) that specifies the actions a drive must take if it does not recognize the identifier for the DCB. The invention also ensures the reliability of the DCB by providing redundant DCBs with identical identifiers and replacing the invalid copy with the valid copy if one is invalid."
Problems solved by technology
Standards are useful in eliminating unnecessary variation, but standards may also inhibit change, even when change is needed.
As the CD technology was extended to general data, and write-once media, and rewriteable media, accommodation of new features with backwards compatibility was always an issue.
Method used
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Embodiment Construction
[0013] In the following discussion, a proposed standard for optical disk media is used to illustrate a specific example embodiment of the invention. However, the invention is equally applicable to any interchangeable rewriteable data storage medium. For example, the invention is equally applicable to tapes, removable magnetic disks or cards, or removable semiconductor memory.
[0014] The proposed standard specifies a rewriteable interchangeable optical disk. A data structure called a Disk Control Block (DCB) is defined. There may be many types of DCB's; some may be defined by the proposed standard, and others may be defined by individual manufacturers. One type of DCB, called a General Media (GM) DCB is defined by the proposed standard. The proposed standard specifies that every compatible medium must write one GM-DCB. All other types of DCB's are optional, and are in addition to the GM-DCB.
[0015] The proposed optical disk medium is formatted into sectors, and sectors are logically ...
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Abstract
A data storage medium includes a data structure, called a disk control block, used for administration and control information for the data storage medium. One medium may contain multiple different disk control blocks, each addressing a different function. Each disk control block includes a control block identifier that specifies the function of the disk control block. Each control block also includes a set of standard access control parameters. If a drive encounters an unrecognized disk control block, the drive can still decode the standard control parameters, so that the drive behavior is not inconsistent with the requirements of the unrecognized disk control block.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional application of Ser. No. 11 / 049,333 filed Feb. 1, 2005. Application Ser. No. 11 / 049,333 is hereby incorporated herein by reference. Application Ser. No. 11 / 049,333 is a divisional application of Ser. No. 09 / 921,024 filed on Aug. 2, 2001. Application Ser. No. 09 / 921,024 is hereby incorporated herein by reference. Application Ser. No. 09 / 921,024 is a divisional application of Ser. No. 09 / 301,880 filed on Apr. 29, 1999 now issued as U.S. Pat. No. 6,330,210. Application Ser. No. 09 / 301,880 is hereby incorporated herein by reference.FIELD OF INVENTION [0002] This invention relates generally to data storage media and more specifically to data structures used for various identification and control attributes for a rewriteable medium. BACKGROUND OF THE INVENTION [0003] A data storage medium typically includes an area for storage of various administration and control information, such as an identification of the m...
Claims
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IPC IPC(8): G11B11/00G06F13/28G06F3/06G11B7/0037G11B19/04G11B19/06G11B20/00G11B20/12G11B20/18G11B23/28G11B27/00G11B27/034G11B27/19G11B27/32
CPCG11B7/0037G11B2220/2537G11B19/04G11B19/06G11B20/00086G11B20/00152G11B20/00695G11B20/00702G11B20/1217G11B20/1252G11B20/1803G11B20/1816G11B23/28G11B23/284G11B27/034G11B27/19G11B27/32G11B27/322G11B27/329G11B2020/1265G11B2020/1278G11B2220/20G11B2220/216G11B7/00745
Inventor WEIRAUCH, CHARLES R.LARNER, JOEL B.
Owner WEIRAUCH CHARLES R