Chapter 4 Theory
Track Layout
36
LTO-4 (Model B) Half-Height Tape Drive User’s Guide
A track group is a set of tracks that is recorded concurrently. The sets of
14 data tracks in a data band are data sub-bands. There are 16 data
sub-bands per data band. The data tracks are accessed in a serpentine
manner.
A wrap is a track group recorded in the physical forward or physical
reverse direction. The wraps are recorded in a serpentine fashion
starting in data band 0. The tape contains 56 track groups, 28 written in
the forward direction and 28 written in the reverse direction. Even-
numbered wraps are recorded in the forward direction (BOT to EOT),
and odd-numbered wraps are recorded in the reverse direction (EOT to
BOT).
Figure 14
shows the layout of data on an LTO tape.
Figure 14 Layout of the Tracks
on LTO Ultrium Tapes
Tape edge
Even # wrap
Servo band
Odd # wrap
Tape edge
Even # wrap
Servo band
Odd # wrap
Sub-band 0
Sub-band 15
Sub-bands 1 through 14
(not shown)
Beginning of tape (BOT)
End of tape (EOT)
Data Band
Summary of Contents for LTO-4 (Model B)
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Page 8: ...Figures viii LTO 4 Model B Half Height Tape Drive User s Guide...
Page 10: ...Tables x LTO 4 Model B Half Height Tape Drive User s Guide...
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