Disc recording apparatus, method for replacing sector on recording disc, and recording disc

• US 6,697,977 B2
• Filed: 10/09/2002
• Issued: 02/24/2004
• Est. Priority Date: 07/21/2000
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Ozaki, Koji
• Primary Examiner(s): PSITOS, ARISTOTELIS
• Application Number:
  US10/267,570
• Publication Number:
  US 20030031106A1
• Time in Patent Office: 503 Days
• Field of Search: 369/53.17, 360/53, 714/2, 714/710
• US Class Current: 714/710
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 20/1251 for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 2020/183 wherein at least one additional attempt is made to read or write the data when a first attempt is unsuccessful
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/2525 Magneto-optical [MO] discs
• CPC Class Codes: G11B 7/00 Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor G11B11/00, G11B13/00 take precedence

Abstract

A disc recording apparatus (A) for writing data onto a sector providing a recording area (B2) on a magneto-optical disc (B) performs a retry upon failure in the writing until a predetermined number of retries is reached, treats the sector as a defective sector upon failure in the last retry of the predetermined number of retries, and writes the data onto another sector. During a physical formatting, A CPU (11) records in medium management information (B1) on the recording disc (B) a retry count as retry count information for each of recovered sectors recovered from the failure through success in the writing of data during the retry. When actual data is written onto the physically formatted magneto-optical disc (B), and upon detection of a defective sector failed in the writing of the actual data, the CPU (11) selects a replacement sector for the defective sector. The replacement sector has a retry count stored as the retry count information smaller than that of the defective sector.

Claims

1. A disc recording apparatus for writing data onto a sector providing a recording area on a recording disc, performing a retry upon failure in the writing until a predetermined number of retries is reached, treating the sector as a defective sector upon failure in the last retry of the predetermined number of retries, and writing the data onto another sector, comprising:

a recording section recording onto the recording disc a retry count as retry count information for each of recovered sectors recovered from the failure through success in the writing of data during the retry; and

a sector replacing section selecting a replacement sector for the defective sector detected upon the failure in the writing onto the recording disc containing the retry count information recorded by the recording section, the replacement sector having a retry count stored as the retry count information smaller than that of the defective sector.

3. The disc recording apparatus according to claim 1, wherein the sector replacing section registers a sector as a defective sector onto the recording disc if the sector is found to have a retry count stored as the retry count information larger than that of the defective sector during the process of selecting the replacement sector.

2. A disc recording apparatus for writing data onto a sector providing a recording area on a recording disc, performing a retry upon failure in the writing until a predetermined number of retries is reached, treating the sector as a defective sector upon failure in the last retry of the predetermined number of retries, and writing the data to another sector, comprising:

a storing section storing a retry count as retry count information for each of recovered sectors recovered from the failure through success in the writing of data during the retry; and

a sector replacing section selecting a replacement sector for the defective sector detected upon the failure in the writing onto the recording disc for which the retry count information is stored by the storing section, the replacement sector having a retry count stored as the retry count information smaller than that of the defective sector.

4. The disc recording apparatus according to claim 2, wherein the sector replacing section registers a sector as a defective sector onto the recording disc if the sector is found to have a retry count stored as the retry count information larger than that of the defective sector during the process of selecting the replacement sector.

5. A method for replacing a sector for writing data onto a sector providing a recording area on a recording disc, performing a retry upon failure in the writing until a predetermined number of retries is reached, treating the sector as a defective sector upon failure in the last retry of the predetermined number of retries, and writing the data onto another sector, comprising:

a step of recording onto the recording disc a retry count as retry count information for each of recovered sectors recovered from the failure through success in the writing of data during the retry; and

a step of sector replacing control for selecting a replacement sector for the defective sector detected upon the failure in the writing onto the recording disc containing the retry count information recorded by the recording step, the replacement sector having a retry count stored as the retry count information smaller than that of the defective sector.

6. A method for replacing a sector for writing data onto a sector providing a recording area on a recording disc, performing a retry upon failure in the writing until a predetermined number of retries is reached, treating the sector as a defective sector upon failure in the last retry of the predetermined number of retries, and writing the data to another sector, comprising:

a step of storing a retry count as retry count information for each of recovered sectors recovered from the failure through success in the writing of data during the retry; and

a step of sector replacement control for selecting a replacement sector for the defective sector detected upon the failure in the writing onto the recording disc for which the retry count information is stored by the storing step, the replacement sector having a retry count stored as the retry count information smaller than that of the defective sector.