Theory of operations
35
Theory of operations
This section describes operational theories used in the Viper 200 drive. It covers the
following topics:
•
Track Layout
•
Recording Method
•
Data Buffer
•
Data Integrity
•
Data Compression
Track layout
Figure 18 summarizes the layout of data on an LTO tape.
Sub bands 1 through 6
(not shown)
Tape edge
Tape edge
Sub band 0
DATA
BAND
Servo band
Servo band
Even # wrap
Odd # wrap
Even # wrap
Odd # wrap
Sub band 7
Beginning of
tape (BOT)
End of
tape (EOT)
0
5
0
5
Figure 18. Layout of tracks on LTO Ultrium tape
There are 384
data tracks
on the LTO tape, numbered 0 through 383. Data track 383
is the track closest to the bottom edge of the tape (the reference edge). The area
between adjacent servo bands is a data band. There are 4 data bands, each of
which includes 96 data tracks. The data bands are numbered 2,0,1,3. Data band 2 is
closest to the bottom edge of the tape.
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