Chapter 4 Theory Track Layout
Figure 10 Layout of Tracks on LTO Ultrium Tapes
•There are 4 data bands, each of which includes 128 data tracks.
•The data bands are numbered 2,0,1,3. Data band 2 is closest to the bottom edge of the tape.
A track group should it be: is a set of 16 data tracks that record concurrently. The sets of 16 data tracks in a data band are data sub bands. There are 8 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 64 track groups, 32 written in the forward direction and 32 written in the reverse direction.
Figure 10 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 6 (not shown)
Even # wrap
DATA BAND
0
Odd # wrap
Sub band 7
5
Servo band Tape edge
28 |
|