Loading patent…
AssigneeInternational Business Machines Corporation
InventorsRichard Greenberg, David A. Styczinski
Estimating the term…
A disk file control provides for tracks having defective sectors by forming sectors as a single, uninterrupted stream of serial data containing both identifier (ID) and data portions. Reading a single ID portion characterizes the entire track to permit writing data without a separate revolution to read the ID field. The ID information includes the offset of the first logical sector on the track and the locations of defective sectors that must be skipped. As soon as one ID is read, the location of the addressed sector is ascertained and the ID data for the sector to be written is formulated so that the entire sector including both ID and data can be written when the sector first approaches the transducer. If alternate sectors are permitted on a subsequent track under the strategy being used, a single ID on the track will define where the logical sectors making up that track will appear (either the physical sector location on the track or at an alternate location on the next track).
In a data storage device with multiple media surfaces that rotate in unison and a plurality of transducers carried by an actuator to enable movement in unison and alignment with concentric data tracks on said media surfaces permitting each transducer to be in a read/write relationship with one of a series of tracks, whereby at a given location the tracks confronting said plurality of transducers form a cylinder and wherein each of said data tracks are divided into a plurality of sequential sectors, each comprising
The method of storing data in a storage device having multiple media surfaces that rotate in unison and a plurality of transducers carried by an actuator for movement in unison into read/write alignment with respective data tracks on said media, wherein the data tracks accessed by said transducers when said actuator is at a given position form a cylinder, comprising
Dependencies are inferred from the claim text.