Transaction-based data storage for magnetic tape

Details Transaction-based data storage for magnetic tape Transaction-based data storage for magnetic tape

2007-01-09

2007-01-09

Bragdon, Reginald (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S118000, C711S135000, C711S171000

Reexamination Certificate

active

10420151

ABSTRACT:
Transaction-based data storage is provided by a host server (130) for a tape storage device (160). Data associated with a transaction is received from a client (105, 110, 115) at the host server (130) and provided to a cache (164) of the tape storage device (160), for writing to the tape medium (168). To confirm that data has been actually written to the tape medium (168) and is not still in the cache (164), a tape medium position corresponding to an amount of tape medium needed to store the data from a transaction is calculated by the host server (130) when it receives the data based on the amount of data and the data capacity of storage blocks of the tape (168). The host server (130) periodically queries the tape storage device (160) to learn the current tape position, and concludes the transaction when the tape storage device has written past the calculated position.

REFERENCES:
patent: 5895488 (1999-04-01), Loechel
patent: 6341342 (2002-01-01), Thompson et al.
patent: 6459540 (2002-10-01), Beavers et al.
patent: 6618795 (2003-09-01), Chan et al.
patent: 2002/0065984 (2002-05-01), Thompson et al.
patent: 2002/0083120 (2002-06-01), Soltis

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