Crypto microprocessor that executes enciphered programs
Interface adaptor emulating magnetic tape drive
Information retrieval system and method using independent user stations
Computer memory system with parallel garbage collection independent from an associated user processor
Optical disk storage format, method and apparatus for emulating a magnetic tape drive
Memory management system improving the efficiency of fork operations
Method and apparatus for controlling data transfers through multiple buffers
System for converting digital data from magnetic tape format apparatus and method for converting a sequentially accessible magnetic tape data format to directly accessible write-once disk data format to worm optical disk format
Pseudo-erasable and rewritable write-once optical disk memory system
ApplicationNo. 265514 filed on 06/20/1994
US Classes:711/4, Dynamic-type storage device (e.g., disk, tape, drum)711/112, Direct access storage device (DASD)711/202Address mapping (e.g., conversion, translation)
ExaminersPrimary: Black, Thomas G.
Assistant: Von Buhr, Maria N.
Attorney, Agent or Firm
International ClassG06F 012/00
AbstractAn optical disk storage system emulates a magnetic tape subsystem by virtual addressing of data recorded on write once optical disk media having a predetermined group of available sectors for rewriting a disk ID, a predetermined plurality of bands of available sectors for rewriting a virtual tape directory to virtual tape VSNs, and, available sectors for rewriting virtual tape maps and rewriting user records, the tape maps have data portions for simulating tape marks and interblock gap and for addressing blocks of data within the virtual tapes, the virtual tape directory has pointers for pointing to tape maps, and the system rewrites the tape directory, tape maps and user records so as to function as a rewritable magnetic tape.