22-02-2007 дата публикации
Номер: US20070041718A1
An information processing apparatus, contains a disc ( 12 ) storing a database with a set of records, each record containing a same set of fields, each record capable of containing record specific content in the fields. A disc drive ( 10 ) reads data from the disc ( 12 ) a fragment (F) at a time. Each fragment (F) contains a plurality of data blocks that are stored substantially contiguously on the disc ( 12 ). The disc drive ( 10 ) can be switched between a read mode and a power saving mode, wherein at least part of the disc drive ( 10 ) is disabled to cut power consumption. A user interface device renders a view of the database with selected records and fields from a user selectable one of a plurality of respective subsets of the set of records and/or fields of the records. The user interface ( 14, 16, 18 ) is programmed to command the disc drive ( 10 ) to switch to the read mode to retrieve fields from records from the selected subset from the disc ( 12 ). The records are stored distributed over different fragments (F) on the disc ( 12 ), with gaps between records in the fragments, grouping said respective subsets of the records and/or fields from the records. The subsets are stored on the disc ( 12 ) positioned so that substantially each subset extends over a minimum number of contiguous fragments that is achievable for the size of the subset.
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