Method of controlling recording information on an optical disk u

Details Method of controlling recording information on an optical disk u Method of controlling recording information on an optical disk u

1995-12-18

1998-04-28

Huber, P. W.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 58, G11B 1722, G11B 390

Patent

active

057454442

ABSTRACT:
Information is recorded on a rewritable optical disk apparatus in accordance with the second generation 5 inch rewritable-type optical disks standards that provide for reusing once-defective user blocks. Such disks have a user data recording region, a replacement recording region and a replacement control information recording region in which a table of information linking defective blocks in the user data recording region with replacement blocks in the replacement recording region is stored. Continuity of the distribution of the replacement recording blocks is maintained by treatment of replacement blocks that become unnecessary. Unnecessary replacement blocks are ones that are not used for storing data because of the subsequent successful recording of data in once defective user blocks to which the replacement blocks were previously linked. Such unnecessary replacement blocks are treated as being defective if a following assigned replacement block exists in the replacement block recording region and they are used in links with other defective user blocks and assigned replacement blocks. In addition to maintaining continuous distribution of the replacement blocks as required by the second generation standard, fewer replacement blocks are required to be used.

REFERENCES:
patent: 5303219 (1994-04-01), Kulakowski et al.
patent: 5453968 (1995-09-01), Veldhuis et al.

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