Chapter 4 Theory Track Layout
Figure 13 Layout of the Tracks on LTO Ultrium Tapes
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.
Figure 13 shows the layout of data on an LTO tape.
0
5
Beginning of | End of |
tape (BOT) | tape (EOT) |
Tape edge
|
|
| Servo band |
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
| Even # wrap |
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Sub band 0 |
|
| |||
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
| ||||
|
|
| Odd # wrap |
|
|
|
| |||
|
|
|
|
| ||||||
|
|
|
|
|
|
|
|
|
|
|
Sub bands 1 through 14 |
|
| ||||||||
DATA | ||||||||||
(not shown) | BAND | |||||||||
Even # wrap
0
5
Sub band 15
Odd # wrap
Servo band
Tape edge
32 |
|
