Tape drive emulation system for a disk drive

Details Tape drive emulation system for a disk drive Tape drive emulation system for a disk drive

1992-04-24

1994-03-22

Argenbright, Tony M.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

360 48, 395500, G11B 7013, G06F 1300

Patent

active

052971244

ABSTRACT:
The invention relates to an emulator system which allows a disk drive to transparently emulate a tape drive. The system converts sequential format tape records into block format disk records and visa-versa. Identification and conversion information for each of the data records are stored in directory located on the outermost sectors of the disk. Within each directory are a plurality of entries each containing four fields: TAPE RECORD NUMBER (TRN); DISK START ADDRESS (DSA); WORD COUNT (WC); and FLAG. These fields contain all of the necessary information required to map a tape formatted data record to a disk and thereafter retrieve the data record from the disk and convert it back to tape format.

REFERENCES:
patent: 4727512 (1988-02-01), Birkner
patent: 4775969 (1988-10-01), Osterlund
patent: 5034914 (1991-07-01), Osterlund
Mitchell, Jr., "Diskette Load/Dump Control" IBM Technical Disclosure Bulletin, vol. 20, No. 4, Sep. 1977.

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