v
Characters
9-16
of
the
top
16
character
line
of
function
13
(word
7)
contain
the
IOP
direct
select
address.
v
Characters
1-8
of
the
bottom
16
character
line
of
function
13
(word
8)
contains
the
disk
unit
type,
level
and
model
number.
Are
characters
1-4
of
the
bottom
16
character
line
of
function
13
(4
leftmost
characters
of
word
8)
equal
to
9337?
v
No
:
Find
the
table
for
the
disk
unit
type
(characters
1-4
of
the
bottom
16
character
line
of
function
13
-
4
leftmost
characters
of
word
8)
in
and
use
characters
13-16
of
the
bottom
16
character
line
of
function
12
(4
rightmost
characters
of
word
5)
as
the
unit
reference
code.
This
ends
the
procedure.
v
Yes
:
Go
to
step
21
(See
page
19.
Are
characters
9-16
of
the
top
16
character
line
of
function
12
(word
3)
equal
to
0002000D?
v
Yes
:
Continue
with
the
next
step.
v
No
:
Use
the
information
in
characters
9-16
of
the
bottom
16
character
line
of
function
13
(word
9),
instead
of
the
information
in
word
1
for
the
reference
code,
and
go
to
–
Characters
1-8
of
the
top
16
character
line
of
function
13
(word
6)
may
contain
the
disk
unit
address.
–
Characters
9-16
of
the
top
16
character
line
of
function
13
(word
7)
may
contain
the
IOP
direct
select
address.
–
Characters
1-8
of
the
bottom
16
character
line
of
function
13
(word
8)
may
contain
the
disk
unit
type,
level
and
model
number.
This
ends
the
procedure.
20.
Disk
information
available
in
this
step
is:
v
Characters
1-8
of
the
top
16
character
line
of
function
13
(word
6)
contains
the
disk
unit
address.
v
Characters
9-16
of
the
top
16
character
line
of
function
13
(word
7)
contain
the
IOP
direct
select
address.
v
Characters
1-8
of
the
bottom
16
character
line
of
function
13
(word
8)
contains
the
disk
unit
type,
level
and
model
number.
Are
characters
1-4
of
the
bottom
16
character
line
of
function
13
(4
leftmost
characters
of
word
8)
equal
to
9337?
v
No
:
Find
the
table
for
the
disk
unit
type
(characters
1-4
of
the
bottom
16
character
line
of
function
13
(4
leftmost
characters
of
word
8)
in
and
use
3002
as
the
unit
reference
code.
Exchange
the
FRUs
for
URC
3002
one
at
a
time.
This
ends
the
procedure.
v
Yes
:
Continue
with
the
next
step.
21.
The
disk
unit
that
stopped
communicating
with
the
system
is
a
9337
Disk
Unit.
22.
Locate
the
IOP
using
the
IOP
address
(see
Note:
If
the
IOP
is
located
in
a
504x
rack,
see
SY44-4934-00,
FC
504x
Problem
Analysis
and
Repair
and
Parts
information.
Using
the
IOP
type
(identified
by
the
label
on
the
IOP),
and
the
device
address,
find
the
location
of
the
device
(see
Does
the
9337
Disk
Unit
Data
display
contain
the
value
9337
xxxx?
Note:
xxxx
can
be
any
hexadecimal
value
from
0000
to
FFFF.
v
No
:
Continue
with
the
next
step.
v
Yes
:
Use
the
service
information
for
the
specific
disk
unit
to
analyze
the
status
of
the
failing
unit.
This
ends
the
procedure.
23.
Set
the
power
switch
on
the
failing
9337
disk
unit
to
the
Off
position,
then
to
the
On
position.
After
4
minutes,
does
the
9337
Data
display
contain
the
value
*xxx?
Analyze
hardware
problems
141
