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SDLT 220 and SDLT 320 Product Manual
CHAPTER 2: SDLT 220/320 Product Information
81-85002-01
March 2004
2-5
2.3.4 Advanced Partial Response Maximum
Likelihood
Improving on Partial Response Maximum Likelihood (PRML) technology
traditionally used in disk drives and communication systems, Quantum’s advanced
PRML channel technology was co-developed with Lucent Technologies to bring
new levels of performance and capacity to high-performance linear tape products.
This provides high-encoding efficiency recording densities for greater capacity
and performance that enables SDLT to substantially increase transfer rates and
capacity.
2.3.5 Advanced Metal Powder Media
Advanced Metal Powder (AMP) media is a state-of-the-art media using durable
metal powder technology for recording very high densities of data. The back side
of the AMP media receives a specially formulated coating to accept the optical
servo tracks. Because the servo information is on the back side of the media, the
entire data-bearing side of the media is available for recording data and eliminate
the need for pre-formatting. In addition, AMP media has been designed to meet the
needs of multiple generations of the SDLT technology.
2.3.6 Positive Engagement
Positive engagement is a highly robust tape leader-buckling mechanism that
increases cartridge life and supports the heavy duty-cycle environments found in
high-end and automation environments.
This mechanism engages the tape leaders upon cartridge load and disengages them
upon cartridge unload. It uses a solid metal pin that is attached to the drive leader
to link with molded clips that are permanently attached to the tape leader inside the
cartridge. The Positive Leader Link design makes the buckling of Super DLTtape I
media a totally reliable mechanical process.
In addition to supporting Super DLTtape I data cartridges, the buckling mechanism
also supports existing DLTtape IV data cartridges to ensure complete backward-
read compatibility.
Summary of Contents for DLTtape SDLT 220
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