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SERVICE
NOTE
Supersedes:
NONE
9154A
APPLIES TO:
All Units: X
Only
Units on Agreement:
At
PM/Normal
Call:
Immediately:
X
Information
Only:
On Failure: —
DISC DRIVE
WARRANTY:
EXTENDED
Serial number:
LABOR :
ALL
PREFIX
2451A
PARTS:
TRAVEL:
POSSIBLE
DATA
LOSS
ON
3.5
INCH
SERVICE
Return
for
Update:
X
Use
as
is:
WINCHESTER
INVENTORY:
Return
for
Salvage:
See
Text:
WARRANTY
EXTENDED
UNTIL:
I
ene
Situation:
It
is
possible
when
writing
to
the
3.5
Inch
Winchester
to
overwrite
the
header
on
an
adjacent
physical
record
of
the disc.
The
corrupted
record
may
not
be used
in
the
write
operation
being
performed,
which
means
that
a
failure
might
not
be
reported
until
an
access
is attempted
to
the
corrupted
record.
If
the
failure
oc-
curs
while
updating
the
directory,
the
drive
would
have
to
be
reinitialized
before
it would
be
accessible.
The
failure
has
only
been
seen
when
performing
a
DMA
transfer
with
a series
200 with
a high
speed
interface
and
processor.
We can
not
guarantee
that
the
failure
will
not
occur
on
all
other
present
and
future
configurations.
Solution:
The
E-PROMs
are
being
updated
to
guarantee
the
hard
disc
controller
chip
is
in
a known
state
when
the
sector
address
is passed
to it.
The
part
number
of
the
new
E-PROMS
will
be
09153-89105
and
09153-89205.
Units
which
have
had
the
firmware
updated
to
correct
this
problem
will
have
Serial
Number
prefix
2520A
or
higher.
Less
than
25 units
were
shipped
with
earlier
revision
firmware.
Warranty:
Units
which
have
the
problem
described
will
also
have
a possibility
of
having
the
drive
defect
described
in
service
note
9154A-2.
As
both
these
situations
require
immediate
update
and
the
update
would
be
extremely
costly
in
the
field,
units
which
have
Serial
Number
prefix
2451A
will
be warranty
replaced.
If a 9154A
with
Serial
Number
prefix
2451A
is
found,
contact
Greeley
Division
on-line
KK
06/03/85
CA HEWLETT
PACKARD
OR MORE
INFORMATION,
CALL YOUR
LOCAL
HP SALES OR SERVICE
OFFICE
or East
(201)
265-5000,
Midwest
(312)
255-9800,
South
4) 955-1500,
West
(213)
970-7500
or
(415)
968-9200
OR WRITE ,Hewlett-Packard,1820
Embarcadero,
Palo
Alto,
California
IN EUROPE,
CALL
YOUR
LOCAL
HP SALES
or
SERVICE
OFFICE
OR WRITE,
Hewlett-Packard
$.A.,7,rue
du Bois-du-Lan,P.0.
Box,
-1217
Meyrin
2-Geneva,Switzerland.
IN JAPAN,
Yokogawa-Hewlett-Packard
Ltd.,
1-27-15,
Yabe
Sagamihara
City,
Jaa
Prefecture,
Japan
229.
1983
Hewlett-Packard
Company
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