Data Format - Fujitsu M2361A Customer Engineering Manual

4.4 Data Format
The M2361A can be used with two different formats, i.e., Variable Sector Format
and Fixed Sector Format, as determined by the controller. The former contains
a 3-Byte DC erased area called an Address Mark (AM) prior to each Address Area
(AA)
indicating the beginning of a record. Therefore, Data Area (DA) with
different lengths in a track can be written or read. On the other hand, every
record must have the same length specified by sector length in the Fixed Sector
Format.
4.4.1 Format
Index
--.F1 __________________________ ___
-.-J
Fi ' --__
Format
Index
or
Sector
Format
4 - 16
--.F1
I
Min
~18
Figure 4.4.1 Variable sector format
Red 0
"I
rRCdD:l
AA
DA
[Byte)
fi
I:
I
H:I
~-------J
L~n"8J
~~2IJ
-L~;L
Figure 4.4.2 Fixed sector format
B03P-482S-0002A ••• 01