Servo and track layout technology
The high-bandwidth servo system features a low-mass servo to help more effectively track servo bands and improve data throughput with damaged media in less-than-optimal shock and vibration environments.
Surface control guiding mechanism
IBM's patented surface control guiding mechanism is designed to guide the tape along the tape path in the 4 tape drive. This method is designed to use the surface of the tape, rather than the edges, to control tape motion. This helps reduce tape damage and tape debris, which comes from the damaged edges and can accumulate in the head area.
Robust drive components optimized for automation environments
Using some of the most robust components available, such as all-metal clutch, steel ball bearings in loader, robust leader block design, and single circuit card, to help enhance reliability and prolong the life of the drives.
Separate writing of multiple filemarks
Separate writing of multiple filemarks is designed to evoke any write command of two or more filemarks to cause a separate data set to be written containing all filemarks after the first. It helps improve performance if a subsequent append overwrites somewhere after the first filemark. This change helps prevent having to rewrite data sets containing customer data and the first filemark, if such an append occurs.
LTO Data Compression (LTO-DC)
The Ultrium 4 uses LTO-DC, which is an implementation of a Lempel-Ziv class 1 (LZ-1) data compression algorithm. LTO-DC is an extension of Adaptive Lossless Data Compression (ALDC) and an improvement over previous IBM lossless compression algorithms. IBM's patented "Scheme-Swapping" compression is designed to look ahead at incoming data, and determine the most efficient storage method to help optimize data compression and increase data throughput.
LTO Cartridge Memory (LTO-CM)
Contained within the LTO Ultrium data cartridge is the LTO-CM, which is a passive, contactless silicon storage device that is physically a part of the cartridge. The LTO-CM is designed to hold information about that specific cartridge, the media in the cartridge, and the data on the media.
Statistical Analysis and Reporting System (SARS)
The Ultrium 4 tape drive uses SARS to help isolate failures between media and hardware. SARS uses the cartridge performance history saved in the CM module and the drive performance history kept in the drive flash EEPROM to help determine the likely cause of failure. SARS is designed to cause the drive to request a cleaner tape, to mark the media as degraded, and to indicate that the hardware has degraded.
Highly integrated electronics using IBM engineered copper technology
This technology is designed to reduce the total number of components in the drive, help lower chip temperatures, and reduce power requirements, helping to provide for a more reliable drive. The drive electronics are designed to provide error correction of soft errors in the memory arrays in data and control paths.