Quantum Tape Drive LTO-3 - Manual (Page 46)

Chapter 4 Theory
Track Layout
32 LTO-3 Tape Drive User’s Guide
A track group is a set of tracks that is recorded concurrently. The sets of
11 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 44 track groups, 22 written in the
forward direction and 22 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 13 shows the layout of data on an LTO tape.
Figure 13 Layout of
the Tracks on LTO
Ultrium Tapes
Tape edge
DATA
BAND
Servo band
Even # wrap
Odd # wrap
Sub band 0
Sub bands 1 through 14
(not shown)
Beginning of
tape (BOT) End of
tape (EOT)
Sub band 15
Tape edge
Servo band
Even # wrap
Odd # wrap
0
5
0
5