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ENERAL SYSTEM OPERAT!ON
E6
E7
EB
E9
2.3 -- Initialization Error Messages
depressed while
a
diskette
tranSTer
is in progress.
The
diskette
presented
with
address that is
controller
has
been
a
cylinder-sector
invalid.
This
e~~o~
indicates some type of a
hardt.dare problem.
FoT'
example~
the
error
can
be
caused
by
missing or
overlapping
memory,
bad
memory;
or
pending IRGs that cannot be serviced.
A seek error occurred while
tr~ing
to
read
the
resident
operating
system
into memory.
Like
E6
errors,
this one indicates
some type oT a hardware
pr~blem.
A data mark error
~as
detected
~hile
trying to read the resident operating
system into memory.
A CRe error was
~ound
while
reading
the
address
mark
that
identifies
sector locations on the diskette.
The diskette
cont-roller
errors
EIJ
E4,
E8,
and
E9
indicate
that
the
diskette
cannot
be
used
to
load the
operating system; howeverl a
new
operating
system
can
be
generated
on that
diskette~
making it
use~ul
again.
Chapter
10~
DOSGEN command, and chapter 15, FORMAT command,
describe
ways
in
~ich
damaged
diskettes
can
be
regenerated.
Depending on the extent of the
e~~orsJ
the
diskette
may
be
used
in
d~ive
one
to
recover any files that may be on it
(sec t
i
on
2. 8. 9).
,"\
!
'
.....
~/
--)
Th
e dis
k
etta c ontro
11
er error
E5
can oc c ur for.a v,ar
i
ety
of
reasons.
The most common reason,
and the most fatal,
is
the
destruction
o~
the
addressing
info~mation
on
the
diskette.
If
the
add~essing
information has been
dest~oyed
(verified
by
using
DUMP
command
to
examine
areas
of
diskette),
the
FORMAT
command
may
be used to rewrite the
add
res sin 9
j
howe ve r l i n
f
0 l'
roa
t
ion
0
n t h e
d a ma 9 e d
dis k e
t
t
e
cannot
be
recovered,
Occasionally.
after a system has Just
been unpacked,
the read/write head may have
been
positioned
past
its
normal
restore
point
on cylinder zero.
In this
case,
trying the event which caused the error three
or
more
tim~s
may
position
the
head to the proper place.
If this
failsl
th~
head
~ill
have to be
manually
repositioned
past
cylinder
zero;
however,
this problem rarely occurs.
The E5
)
er~ors
can also occur
if
a
user-written
program
accesses
drives
1-3
without
using
one
oT the system Tunctions and
Page
02-04
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