Tape alert flag structure, Tape, Alert – Dell PowerVault TL4000 User Manual
Page 31: Flag, Structure, Statistics, Counter, 30h), Page
v
I
=
Informational
suggestion
to
user
v
W
=
Warning.
Remedial
action
is
advised.
Performance
of
data
may
be
at
risk.
v
C
=
Critical
immediate
remedial
action
is
required.
Tape
Alert
Flag
structure
Bit
7
6
5
4
3
2
1
0
Byte
0
(MSB)
Parameter
Code
(n)
1
(LSB)
2
DU(0)
(DS(1)
TSD(0)
ETC(0)
TMC(0)
Reserved
Reserved
LP(0)
3
Parameter
Length
(1)
4
Value
of
Flag
(Set
when
bit
0
=
1)
Field
descriptions:
Parameter
Code:
The
Parameter
Code
is
a
2-byte
value
that
uniquely
identifies
the
parameter
within
the
log.
It
ranges
from
1..64
DU:
Disable
Update
is
set
for
any
parameter
that
the
Host
cannot
reset.
DS:
Disable
Save.
The
media
changer
has
no
support
for
SP
bit.
Set
to
1.
TSD:
Target
shall
determine
save
method.
ETC:
No
threshold
comparison
TMC:
No
threshold
supported
LP:
The
List
Parameter
field
is
set
to
zero
for
parameters
that
are
counters
and
set
to
one
for
parameters
that
are
not
counters.
Statistics
Counter
Page
(30h)
This
page
consists
of
the
Page
Header
followed
three
vendor
specific
counters.
The
information
in
this
page
is
stored
in
NV-RAM
on
power
shut-down.
This
page
will
not
be
affected
by
the
LOG
SELECT
command
nor
by
Firmware
updates.
Bit
7
6
5
4
3
2
1
0
Byte
0
Reserved
Page
Code
(30h)
1
Reserved
2
(MSB)
Page
Length
(0048h)
3
(LSB)
4
-
51
9
Statistics
Counter
structures
(72
bytes)
Field
descriptions:
Page
Code:
The
Page
Code
echoes
the
page
code
that
was
specific
in
the
Log
Sense
CDB.
Chapter
3.
Supported
SCSI
Commands
3-17