Typical Timing Sequence - IBM 5114 Maintenance Information Manual

Typical Timing Sequence
This timing sequence shows a seek operation from track
00 to track 20. Track 20 is the track that is to be read
from or written to.
~i-1.S
to
3. 0
ms
166.7 ms
"I
•
Index Pulse
.IIL-______________________________________________________________________________
~
Head Load
Read Write
80 ms Minimum .
==::I
l'+-40 ms Minimum
Access 0
Access 1
Access 2
Access 3
Track
- i
~ ~
"""'1
~
1 I 1 I I I I I I I 1 I
I
I I . 1 I I I I I I I I I I I I I
···1
! ,.,.., ! ,.,..,
i
~
! r-t-i
I I I I 1 1 I 1 1 1 I I 1 I I 1 1 I I
--~!~!I-+-!!~!~,
I I I I 1 I 1 I I I 1 I I I I 1 I I I I
---, II~IIIIIIIIIIIIIIII
r-r-!1-..c1 . . . 1 .... 1 . .
I I I I I I I I I I I I 1 1 1 I I 1 1 1
1 I 1 1 1 1 I I 1 1 1 1 1 1 I I 1 1 I 1
1 I I 1 1 I 1 1 I I 1 1 I I 1 I 1 1 I I
1 1 I 1 1 I 1 I I I I 1 I I I 1 1 I 1 I
0' 112~314~516~ 71819!10!11112113!14!15~16!17!18!19!20. ~
~
ls
ms Track to Track Seek Time
Note: Seeking and head loading are not timed to the
index.
3-24
/
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1,(\_7'