Page 6-4
The screen will display:
I f you p r ess the N k e y , th e p r o gram w i l l b e h a l t e d
a nd con t ro l o f
t h e C o m p u t e r w i l l b e r e t u r n e d t o
Z-DOS. If yo u p r ess the Y k e y , P REP wi l l c o n t i n u e
operation.
•
To ex i t P REP, press the N key. The Z-DOS sys-
Enter number of heads in hex:
tem prompt w i l l be displ ayed,
•
E nter 4 (th e h e x a d e c i m al e q u i v a l e nt o f th e
number of read/write heads) and press the RE-
TURN k ey. Next, the screen will d i s p l a y :
Enter number of cylinders in hex:
•
To co n t i n u e w i t h P R E P, press the Y k e y . Y o u
will see:
Please type P to pr oceed
•
T h i s n u m b e r i s e q u a l t o t h e t o t a l n u m b e r o f
t racks divi ded by the total number of read/wr i t e
h eads. Enter 132 (the h e x adecimal e q u i v a l en t
of the n u m ber o f c y l i n d e rs) and p r ess the R E -
TURN key. The screen will now display:
T his d i s p l a y g i v e s y o u o n e l a s t c h a n c e t o
change your m i n d . T h e r eason for t h i s second
prompt i s t h e n a t ur e o f P R EP. PREP w i l l d e -
s troy any a n d a l l i n f o r m a tio n t h a t h a s p r e v i -
ously been
recorded on the Winchester disk.
•
To co n t i n u e w i t h P REP, press the P key, If you
press any other ke y, PREP will be stopped and
y ou will see the Z-DOS system prom p t .
I f the d i s k h a s b een p r e v i o u sl y p r e p ared a n d
P REP detects n o e r r o r s i n t h e b o o t c o d e o r
" superblock" (expl ai ned later), then the foll o w -
i ng f i v e
d i s k p a r a m e te r q u e s t i on s w i l l b e
s kipped and th e t ests w il l b e r u n . H o w e v er, i f
t he disk ha s no t b een p r e v i o u sl y p r e p ared o r
i f an e r r o r i s d e t e c te d i n t h e b o o t c o d e o r
superblock, then you w i l l b e asked to enter five
d isk p a r am eters. Y o u r a n s w er s w i l l d e p e n d
u pon the type of W i n c h ester dr iv e i n st alled i n
the Desktop Comput er .
In the examples that foll ow , the responses sup-
p lied are for th e M i n i s c r ibe 2012. For th e c or -
r ect responses fo r o t h e r a p p r o ve d d r i v e s a r e
supplied in Table 6-1.
Enter pre-comp cylinder in hex:
Enter reduced write current cylinder in hex:
•
T o w ar d t h e h u b o f a h a rd d i s k, w h e re t he c i r -
c umference of each track is smaller, some Wi n -
c hester systems require that less electrical cu r -
r ent be appl ied to th e w r i t e head to avoi d h a v -
i ng m a gneti c p u l s e s o v e r la p a d j a cent t r a c k s .
T he M i n i s c r ibe M o d I I 2 0 1 2 d o e s no t r e q u i r e
reduced wr ite current. Therefore, a value great-
e r than the largest cyli n der n u m ber w i l l b e en -
tered. Enter 200 (the number in h e x adecimal of
t he cyl i n de r w h e r e th e c u r r en t a p p l i e d t o t h e
w rite h e a d i s r e d u c e d t o a v o i d o v e r w r i t i n g
track b o u n d s ) a n d p r e s s t h e RE T U R N k ey .
N ext, the screen wil l d i s p l a y :
•
Disk st o r a ge d e v i c es operate by c r e a ting m a g -
n etically p o l a r i ze d a r eas o n t h e d i s k s u r f a c e
that correspond to the presence or absence of
" bits" ( t h e s m a l l est u n i t o f m e a s ur e i n c o m -
p uter d at a a n d m e m o r y ) i n t h e i n f o r m a t i o n
Table 6-1.
W i n c h ester Disk Drive Parameters
Manufacturer and
Model
Number
Cylinders
Number
Heads
Wr. Curr
Cylinder
I'recomp
Step
SHIP
C ylinder
Cod e
Cyl i n d e r
Miniscribe Mod II 2012
CMI 5412
CMI 5619
Seagate ST-412
132
132
132
132
200
200
200
200
14F
131
131
131
80
80
80
80
Summary of Contents for Z-100 Series
Page 2: ...Z 10 eri es User s Manual Winchester u lcm ent I aa systems...
Page 84: ...7 4 q 1 a m...
Page 88: ......
Page 90: ...Page 2 2...
Page 118: ...Page 4 26...
Page 148: ......
