Information writing and reading apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 4, 1995
Grant Date -
N/A
app pub date -
Jun 29, 1992
filing date -
Jun 27, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An information writing and reading apparatus for writing and reading data on a recording disk has a plurality of rewritable sectors for storing normal data and a plurality of DMA sectors for storing defect management data repeatedly in a plurality of DMAs (Defect Management Areas). The information writing and reading apparatus includes DMA register for storing condition data representing the condition of the DMA sectors, erasing device for erasing data in the recording disk by a sector, and a controller for controlling such that after one DMA sector is erased by the erasing device, a condition of the DMA sector is examined whether it is a defectless sector or a defect sector, and a flag representing the examined result is stored in the DMA register.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully