Control, Extension, 0ah) – Dell PowerVault TL4000 User Manual
Page 37: Tape, Alert, 1ch), Page
Parity:
By
means
of
this
field
the
host
can
enable
parity
retires.
Parity
retries
are
by
factory
default
enabled
by
the
media
changer.
When
cleared
parity
retries
are
disabled.
Maximum
Parity
retries:
This
field
indicates
the
maximum
number
of
retries
performed
on
a
parity
error
during
data
out,
data
in,
and
message
out
phase.
The
number
of
parity
retries
is
by
factory
default
set
to
4.
The
maximum
value
allowed
in
the
parity
retry
field
is
7.
Control
Extension
page
(0Ah)
By
means
of
this
page
the
host
can
control
SCSI
features
provided
by
the
media
changer.
Bit
7
6
5
4
3
2
1
0
Byte
0
Reserved
SPF
(1)
Page
Code
(0Ah)
1
Subpage
code
(31h)
2
(MSB)
Page
Length
(1Ch)
3
(LSB)
4
Reserved
TCMOS
SCSIP
IALUAE
5
Reserved
Initial
Priority
6
-
31
Reserved
Field
descriptions:
SPF:
The
Sub
Page
Format
(SPF)
bit
is
set
to
one
to
indicate
this
is
a
subpage.
TCMOS:
A
TCMOS
bit
set
to
zero
specifies
that
the
timestamp
shall
not
be
changed
by
any
method
except
those
defined
by
this
standard.
SCSIP:
A
SCSI
precedence
(SCSIP)
bit
set
to
one
specifies
that
the
timestamp
changed
using
a
SET
TIMESTAMP
command
shall
take
precedence
over
any
other
methods.
IALUAE:
The
implicit
asymmetric
logical
unit
access
enabled
(IALUAE)
bit
must
be
set
to
zero.
The
media
changer
does
not
allow
implicit
asymmetric
logical
unit
access
state
changes.
Tape
Alert
Page
(1Ch)
By
means
of
this
page
the
Host
can
specify
the
method
of
reporting
Tape
Alert
events.
Currently
only
the
polling
method
is
supported.
Bit
7
6
5
4
3
2
1
0
Byte
0
Reserved
SPF
(0)
Page
Code
(1Ch)
1
Additional
Page
Length
(0Ah)
2
Perf
(0)
Reserved
Dexcpt
Test
(0)
Reserved
LogErr
3
Reserved
MRIE
(0)
4
-
7
Internal
Timer
8
-
11
Report
Count
/
Test
Flag
Number
Chapter
3.
Supported
SCSI
Commands
3-23