Abstract: The present invention provides fast read performance for accessing a file from a multiplicity of files when its corresponding Block ID is unavailable, by furnishing new file-positioning commands, allowing access to data based on File Number, at the same fast locate speed as with Block Ids, thereby expanding the range of applications that can use certain tape drive systems effectively. The present invention includes both a device architecture for supporting the file oriented positioning and the appending, as well as a software system that can permit easy application access to the device facilities and system components which permit the advantages to accrue without any software application or operator changes, including a robust architecture for navigating residual data, e.g., for data recovery. The present invention comprises several device command innovations, a relative positioning command, an absolute positioning command, and other commands, e.g., for sensing current position.

Abstract: A data storage device having a fixed device architecture capable of operating in a first capacity mode or in a second capacity mode, and capable of switching between that first capacity mode and that second capacity mode. In certain embodiments, the first capacity mode utilizes a 22 bit blockid format and the second capacity mode utilizes a 32 bit blockid format. In other embodiments, the first capacity mode utilizes a 32 bit blockid format and the second capacity mode utilizes a 22 bit blockid format. A data storage device comprising a computer useable medium having computer readable program code disposed therein for recording information in alternative information storage architectures. A data storage and retrieval system which includes one or more of Applicants' data storage devices. A computer code product comprising a data management system which supports the capability to record information on a data storage medium using alternative information storage architectures.

Abstract: A data storage device comprising a computer useable medium having computer readable program code disposed therein for writing information on a data storage medium using fast multiple file write operations. A data storage and retrieval system comprising one or more of Applicants' data storage devices. Computer program products embodied as program code stored in Applicants' storage device.

Abstract: The present invention provides fast read performance for accessing a file from a multiplicity of files when its corresponding Block ID is unavailable, by furnishing new file-positioning commands, allowing access to data based on File Number, at the same fast locate speed as with Block Ids, thereby expanding the range of applications that can use certain tape drive systems effectively. The present invention includes both a device architecture for supporting the file oriented positioning and the appending, as well as a software system that can permit easy application access to the device facilities and system components which permit the advantages to accrue without any software application or operator changes, including a robust architecture for navigating residual data, e.g., for data recovery. The present invention comprises several device command innovations, a relative positioning command, an absolute positioning command, and other commands, e.g., for sensing current position.

Abstract: A data storage device comprising a computer useable medium having computer readable program code disposed therein for writing information on a data storage medium using fast multiple file write operations. A data storage and retrieval system comprising one or more of Applicants' data storage devices. Computer program products embodied as program code stored in Applicants' storage device.

Abstract: A data storage device having a fixed device architecture capable of operating in a first capacity mode or in a second capacity mode, and capable of switching between that first capacity mode and that second capacity mode. In certain embodiments, the first capacity mode utilizes a 22 bit blockid format and the second capacity mode utilizes a 32 bit blockid format. In other embodiments, the first capacity mode utilizes a 32 bit blockid format and the second capacity mode utilizes a 22 bit blockid format.

Abstract: A data storage device comprising a computer useable medium having computer readable program code disposed therein for writing information on a data storage medium using fast multiple file write operations. A data storage and retrieval system comprising one or more of Applicants' data storage devices. Computer program products embodied as program code stored in Applicants' storage device.

Abstract: The present invention provides fast read performance for accessing a file from a multiplicity of files when its corresponding Block ID is unavailable, by furnishing new file-positioning commands, allowing access to data based on File Number, at the same fast locate speed as with Block Ids, thereby expanding the range of applications that can use certain tape drive systems effectively. The present invention includes both a device architecture for supporting the file oriented positioning and the appending, as well as a software system that can permit easy application access to the device facilities and system components which permit the advantages to accrue without any software application or operator changes, including a robust architecture for navigating residual data, e.g., for data recovery. The present invention comprises several device command innovations, a relative positioning command, an absolute positioning command, and other commands, e.g., for sensing current position.