IBM 25R0012 User Guide - Page 67

Fixing, Intermittent, Error, Single, Drive, Multiples, Drives

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SCSI cable and the problem persists, the fault is with the server's hardware or software. To isolate the cause of the failure, refer to the server's service documentation. - If the test fails, replace the drive. v If the error does not occur, connect one drive at a time back to the bus and repeat step 3 for each drive until you can identify which drive is defective. Note: Ensure that the SCSI terminator is always on the last drive on the SCSI bus. 4. Determine if the problem is with only one drive or with two or more drives. v If the problem is with only one drive, run the SCSI wrap test on that drive (see "Function Code 6: Run SCSI Wrap Test" on page 20). - If the test runs successfully, replace the SCSI terminator first, then the SCSI cable to that drive and interposer (if installed). - If the test fails, replace the drive. v If the problem is with two or more drives, locate the first drive that has the error and replace the SCSI cable that connects the drive and the interposer (if installed). Fixing an Intermittent Error with a Single Drive on a SCSI Bus: 1. Replace the SCSI terminator on the drive. 2. Run the operation that caused the error. If the problem persists, the problem may be with the cable. 3. Isolate which cable is causing the problem by replacing one cable at a time and running the operation that caused the error after each replacement. If the problem persists after all cables have been replaced, the problem may be with the drive. 4. Replace the drive. If the problem persists, the problem is with your server. Consult your server's documentation. Fixing an Intermittent Error with Multiples Drives on a SCSI Bus: Refer to the server's error logs to determine which drive is the source of the problem: v If only one drive is reporting a SCSI failure, replace that drive. v If multiple drives are reporting SCSI failures, the problem may be with the terminator or the SCSI cables: - Replace the terminator and run the operation that caused the error. If the problem persists, the problem may be with the cables. - Isolate which cable is causing the problem by replacing one cable at a time and run the operation that caused the error after each replacement. Using Ultrium Media 51

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SCSI
cable
and
the
problem
persists,
the
fault
is
with
the
server’s
hardware
or
software.
To
isolate
the
cause
of
the
failure,
refer
to
the
server’s
service
documentation.
–
If
the
test
fails,
replace
the
drive.
v
If
the
error
does
not
occur,
connect
one
drive
at
a
time
back
to
the
bus
and
repeat
step
3
for
each
drive
until
you
can
identify
which
drive
is
defective.
Note:
Ensure
that
the
SCSI
terminator
is
always
on
the
last
drive
on
the
SCSI
bus.
4.
Determine
if
the
problem
is
with
only
one
drive
or
with
two
or
more
drives.
v
If
the
problem
is
with
only
one
drive,
run
the
SCSI
wrap
test
on
that
drive
(see
“Function
Code
6:
Run
SCSI
Wrap
Test”
on
page
20).
–
If
the
test
runs
successfully,
replace
the
SCSI
terminator
first,
then
the
SCSI
cable
to
that
drive
and
interposer
(if
installed).
–
If
the
test
fails,
replace
the
drive.
v
If
the
problem
is
with
two
or
more
drives,
locate
the
first
drive
that
has
the
error
and
replace
the
SCSI
cable
that
connects
the
drive
and
the
interposer
(if
installed).
Fixing
an
Intermittent
Error
with
a
Single
Drive
on
a
SCSI
Bus:
1.
Replace
the
SCSI
terminator
on
the
drive.
2.
Run
the
operation
that
caused
the
error.
If
the
problem
persists,
the
problem
may
be
with
the
cable.
3.
Isolate
which
cable
is
causing
the
problem
by
replacing
one
cable
at
a
time
and
running
the
operation
that
caused
the
error
after
each
replacement.
If
the
problem
persists
after
all
cables
have
been
replaced,
the
problem
may
be
with
the
drive.
4.
Replace
the
drive.
If
the
problem
persists,
the
problem
is
with
your
server.
Consult
your
server’s
documentation.
Fixing
an
Intermittent
Error
with
Multiples
Drives
on
a
SCSI
Bus:
Refer
to
the
server’s
error
logs
to
determine
which
drive
is
the
source
of
the
problem:
v
If
only
one
drive
is
reporting
a
SCSI
failure,
replace
that
drive.
v
If
multiple
drives
are
reporting
SCSI
failures,
the
problem
may
be
with
the
terminator
or
the
SCSI
cables:
–
Replace
the
terminator
and
run
the
operation
that
caused
the
error.
If
the
problem
persists,
the
problem
may
be
with
the
cables.
–
Isolate
which
cable
is
causing
the
problem
by
replacing
one
cable
at
a
time
and
run
the
operation
that
caused
the
error
after
each
replacement.
Using
Ultrium
Media
51