For
HP
Internal Use
Only
Valid. A value
of
1 indicates
that
the
Information bytes contain valid information.
The
exact
significance
of
the
Information bytes depends on
the
status
of
t~e
Sense Key field.
Error
Class. Always set
to
7.
Error
Code. A value
of
0 specifies current error; a value of 1 specifies deferred error.
Segment
Number.
Contains
the
number
of
the
current segment descriptor when
the
REQUEST
SENSE command is in response
to
a
COPY
command. Otherwise, this field is set
to
0.
FM
(File
Mark).
A value
of
1 indicates
the
logical position is
at
a filemark or setmark.
EOM
(End
of
Media). Indicates
the
physical position is
at
End
Of
Media. Sense Key is set
to
No Sense.
The
Additional Sense Code is set
to
04 for Beginning
Of
Partition
or
02
for
End
Of
Partition.
Beginning
Of
Partition
is
reported
after a Space command encounters BOP.
End
Of
Partition
is
reported
when a Write
or
Write File Marks command leaves
the
tape
positioned
in
the
Early
Warning region near
the
End
Of
Partition.
Note
On
aDDS-formatted
tape,
there
are two indicators toward
the
physical end
of
the
partition.
EOT
occurs 500
mm
before
the
EOM
mark.
EOM
indicate
the
end
of
usable
tape.
The
drive will never write
data
to
the
tape
after
encountering
EOM.
The
drive uses
EOT
to
generate Early Warning
EOP
on
writes.
The
host may write approximately
10
megabytes
of
data
to
the
tape
following
the
Early Warning
EOP
before encountering
the
physical EOM.
ILl
(Incorrect
Length
Indicator).
Indicates
the
requested block
length
did not
match
the
actual
block length. Only Read
and
Verify
may
cause this
bit
to
be
set.
Sense Key. Indicates
the
type
of
error
that
has occurred,
and
the
recovery action
that
should
be taken by
the
initiator.
Refer
to
Table 5-54.
Information. These bytes are valid only
if
the
Valid field is set
to
1.
They
contain residue
information following
the
failure of a Read, Write, Write Filemarks,
or
Space command.
Additional Sense Length. Specifies
the
number
of
Additional Sense bytes
to
follow. Always
set
to
OB.
Command
Specific Information. Normally set
to
0.
If,
however,
the
Sense
data
is for a check
conditioned
Copy command, and
the
Additional Sense is Copy
Aborted,
then
the
first two
bytes are set
to
19
and
the
last
two are set
to
0.
Additional Sense Code
and
Additional Sense Code Qualifier. Provide additional information
about
the
cause
of
the
Check Condition
or
the
current
tape
position. Refer
to
Table 5-55.
Field Replaceable Unit
(FRU)
Code.
The
value of this field indicates
the
FRU
that
failed, as
follows:
5-68 Troubleshooting
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