Storing partial data sets to magnetic tape

Details Storing partial data sets to magnetic tape Storing partial data sets to magnetic tape

2011-06-21

2011-06-21

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

C360S048000, C360S053000

Reexamination Certificate

active

07965462

ABSTRACT:
Methods, logic, apparatus and computer program product write data, comprising less than a full Data Set, to magnetic tape. Data is received from a host, a do-not-interleave command is issued and C1 and C2 ECC are computed. Codeword Quad (CQ) sets are then formed. At least one CQ set of the Data Set is written to a magnetic tape in a non-interleaved manner and a Data Set Information Table (DSIT) is written to the magnetic tape immediately following the at least one written CQ set. An address transformation may be used to cancel interleaving. Writing a CQ set may include writing a plurality of contiguous instances of the CQ set to the magnetic tape to maintain the effectiveness of ECC capability.

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