4.
Verify
the
SAS
host
adaptor
is
supported
by
the
tape
drive.
5.
Ensure
there
is
a
point-to-point
connectivity
between
the
server
and
the
tape
drive.
SAS
connectivity
does
not
support
multiple
drive
connections
(daisy-chaining
of
devices).
6.
Check
the
length
of
the
SAS
cable.
It
can
not
exceed
5.5m
(18
ft).
Procedure
4:
Verifying
Host
Interface
Communications
The
Wrap
Diagnostic
tests
the
communication
function
at
the
device
interface.
However,
to
thoroughly
verify
host-to-device
communications,
it
is
highly
recommended
to
exercise
activity
over
the
SAS
interface
bus
from
the
host
to
the
drive
and
back.
A
recommended
utility
to
perform
this
test
is
the
ITDT
utility
available
on
the
web
at
http://www.ibm.com/storage/lto
This
utility
is
especially
effective
for
updating
the
drive
firmware
and
for
performing
the
Test
Device
function.
For
additional
information
about
using
the
ITDT
utility,
see
Perform
the
following
steps:
1.
If
the
ITDT
utility
is
not
installed
on
your
system,
download
the
appropriate
operating
system
version
from
the
web
into
a
directory
or
folder
of
your
choice
on
your
system.
2.
When
installation
is
complete,
run
the
SCAN
(
s
)
option
to
determine
if
your
system
can
detect
all
of
the
Ultrium
tape
drive
devices
(including
any
libraries
or
autoloaders
that
may
be
on
the
bus).
3.
Select
the
drive
that
is
to
be
tested
or
to
have
firmware
downloaded.
4.
For
testing,
select
the
Test
Device
(
t
)
option.
Note:
This
option
will
perform
a
series
of
LOADS,
UNLOADS,
and
WRITE/READ
operations.
Both
tape
drive
control
commands
and
data
are
sent
to
the
device
over
the
interface
bus.
5.
If
allowed
to
complete,
the
test
will
run
for
at
least
30
minutes.
At
any
time
an
ABORT
(
a
)
can
be
entered
to
end
the
device
test
early
if
it
is
determined
that
interface
communications
have
been
satisfactorily
achieved.
Resolving
Problems
Reported
by
the
Server
The
procedure
for
fixing
interface
bus
errors
varies,
depending
on
whether
the
error
is
consistent
or
intermittent,
and
on
your
configuration.
The
sections
that
follow
describe
how
to
fix
an
error.
Fixing
SAS
Bus
Errors
1.
Check
if
the
tape
drive
power
is
on.
2.
Verify
the
SAS
cable
is
connected
properly
to
the
server
and
to
the
tape
drive.
3.
Replace
SAS
cable
if
it
shows
any
signs
of
damage.
Resolving
Media-Related
Problems
To
resolve
problems
that
are
related
to
media,
the
drive’s
firmware
includes:
v
Test
Cartridge
&
Media
diagnostic
that
verifies
whether
a
suspect
cartridge
and
its
magnetic
tape
are
acceptable
for
use.
v
Statistical
Analysis
and
Reporting
System
(SARS)
to
assist
in
isolating
failures
between
media
and
hardware.
To
determine
the
cause
of
failure,
SARS
uses
the
cartridge
performance
history
that
is
saved
in
the
cartridge
memory
(CM)
and
the
drive
performance
history
that
is
kept
in
the
drive’s
VPD
(Vital
Product
Data)
area
Chapter
5.
Troubleshooting
5-3
Summary of Contents for System Storage TS2240
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