Read on arrival scheme for a disc drive

摘要

A read-on-arrival scheme for reading data stored on a track of a data storage disc is disclosed. The track is divided into a plurality of sequentially arranged data sectors. Each data sector stores a block of data. A host computer issues a read command requesting retrieval of a segment of data blocks stored on a plurality of the data sectors. The segment may include a target data segment as well as a pre-fetch and post-fetch data segment. The read command specifies a target sector that a transducer is to initially access on the track. Upon receipt of the read command, components of a disc drive move the transducer to the track for access of the segment requested in the command. The disc drive components enable the transfer of data regardless of whether the transducer first accesses a sector located in sequential order prior to or following the target sector.