Dynamic information storage or retrieval – Simultaneous diverse types of storage or retrieval
Patent
1995-01-04
1997-04-01
Nelms, David C.
Dynamic information storage or retrieval
Simultaneous diverse types of storage or retrieval
3692751, 369 54, G11B 1300
Patent
active
056173806
ABSTRACT:
An optical recording system writes data on an optical disk that has a user data area having a plurality of sectors and that has a map having first and second indicators corresponding to a portion of the plurality of sectors. The first indicator has a first logic state indicating that a corresponding sector contains data and has a second logic state indicating that the corresponding sector does not contain data. The second indicator has a first logic state indicating that the corresponding sector is to be erased. A recorder is coupled to the optical disk for erasing data and the indicators from the sectors and the map, respectively, in response to an erase command. The recorder writes data and the indicators on the sectors and the map, respectively, in response to a write command. A processor coupled to the optical storage medium and the recorder provides both the erase command and the write command in response to the first indicator being in the first logic state for a two-pass write, provides the write command in response to the first indicator being in the second logic state for a one-pass write, and provides the erase command in response to the second indicator being in the first logic state during an off-line data management phase. A memory stores a copy of the map having third and fourth indicators corresponding to a portion of the plurality of sectors, the third indicator having a first logic state indicating that a corresponding sector contains stored data and having a second logic state indicating that the corresponding sector does not contain stored data, the fourth indicator having a first logic state indicating that a corresponding sector is to be erased during the off-line data management phase.
REFERENCES:
patent: 5124963 (1992-06-01), Ando
patent: 5349577 (1994-09-01), Mikamo
patent: 5367510 (1994-11-01), Ando
patent: 5406538 (1995-04-01), Hotori et al.
Fujitsu Limited
Hoang Huan
Nelms David C.
Terrano Mark C.
Weller Edward B.
LandOfFree
Apparatus and method for drive management for multi-pass storage does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for drive management for multi-pass storage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for drive management for multi-pass storage will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-545223