IBM 5280 Maintenance Information Manual page 89

TYPICAL TIMING SEQUENCE
This timing sequence chart shows a seek operation from
track 00 to track 05. Track 05 is the track to be read
from or written on.
I·
1,....1
- - - - - - - - 1 6 6 . 7 m s - - - - - - - -....
·I
---t
1-
1 . 5 ms to 3.0 ms
Index
Head Engagged
Read/Write Operation
Access 0
Access 1
l
a:;:;:
ll....------~------------
..
·~:;:;: t
~~
................................
'
~---ct
\
I" \
.... · - - - - - - - - 8 0 ms Minimum---------a
a ,
I . . . .
-+--40 ms
Minimum---,_~'
~------cl~~~------~~~--~--~------------------~\
...... ,.l ....
~~
..
~~----------------~l
......
t~t
......
~~~
..
I . . . . . . . . . . . . . . . . . .
~
I I
I
I
I I
I
I
01
1
I
2
I
3 I 4
I
I
I
I
Track 0
~-'~44
Track 5 - - -.......
~ ~
5 ms Track to Track Seek Time
Note: Seeking and head loading are not timed to the index.
Theory 77