Quantum DLT 2000 Handbook page 128

of the DLTtape drives, with even less contact between the tape
media and the rollers. The dual motor system in Super DLTtape
drives is very similar to that used in the DLTtape drives.
Super DLTtape drives record data in a serpentine linear format,
just like DLTtape drives, but use eight-channel recording, versus
four channels for the DLT 7000 and DLT 8000 drives.
Super DLTtape technology employs the same Parallel Channel
Architecture as previous DLTtape drives. Super DLTtape drives
record data using 448 data tracks, versus 208 for the DLT 7000 and
DLT 8000 drives. They do not use the Symmetric Phase Recording
(SPR) technique employed in the DLT 7000 and DLT 8000 drives,
except when reading data previously recorded on a DLTtape drive
using SPR.
Of course the big differences between Super DLTtape and DLTtape
technology are in performance and capacity. Super DLTtape drives
offer capacity of 110GB (uncompressed) and data transfer rates of
11MB/second. The key to these dramatic achievements is a series
of technology innovations. These innovations are described in
more detail in Chapter 17, Super DLTtape: The Future of DLTtape
Technology. They are:
• Laser Guided Magnetic Recording (LGMR
• Pivoting Optical Servo (POS),
• Magneto-Resistive Cluster (MRC) heads,
• Partial Response Maximum Likelihood (PRML)
channel technology,
• Positive engagement tape leader buckling mechanism,
•
Advanced Metal Powder (AMP) media,
•
New, rugged media cartridge.
11.6 DLTtape SYSTEM TECHNOLOGY COMPARED
) technology,
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