Patent ID: 7631141
Filing Date: 2009-12-08
Classification: G06F,G11B

Abstract:
1. A data storage device comprising: a forward sequential writer capable of sequentially forward writing data to a first track of multiple tracks on a tape storage media, said forward writing starting at a first write starting position and ending at a predetermined first write ending position, wherein the predetermined first write ending position leaves enough room before an end of the tape storage media to permit future data writing between the predetermined first write ending position and the end of the tape storage media; a reverse writer capable of writing the data on a second track of the multiple tracks on the tape storage media, the reverse writer continuing writing of the data in a reverse direction as that written by the forward sequential writer, the reverse writer writing the data in response to the forward sequential writer reaching the predetermined first write ending position; in response to the reverse writer not completing writing of the data before reaching the predetermined first write starting position, a linking writer linking the data and completing writing the data from a second write starting position on a third track on said tape storage media, the linking writer not being limited by a predetermined write ending position; and a progress quantity standard value adjuster for adjusting a progress quantity standard value for a next set of data to be forward and reverse written.