Dell PowerVault TL4000 SCSI Reference Guide - Page 38

Element, Address, Assignment

Get Dell PowerVault TL4000 PDF manuals and user guides View all Dell PowerVault TL4000 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 38 highlights

Field descriptions: Perf: When this bit is set to 0, this indicates that informational exception operations that can cause delays are acceptable. This bit should be set to zero. Dexcpt: When this bit is set to zero the reporting method indicated by the MRIE field is used. When this bit is set to one this indicates that the media changer shall disable all information exception operations, ignoring the MRIE field (In this mode the initiator must the poll the Tape Alert log page). Currently only MRIE mode 0 is supported, so this bit is ignored. Test: Test modes are not supported, this field must be set to zero. LogErr: When this bit is set to 0, the media changer shall not log any Tape Alert events. When this bit is set to 1, the media changer shall log Tape Alert events. MRIE: With this field the initiator can specify the method used by the media changer to report informational exception conditions (Tape Alert events). Currently only mode 0 is supported. This means that Tape Alert flags can only be read by polling with the LOG SENSE command to the Tape Alert page. Interval Timer: The media changer does not report Tape Alert conditions as Informational Exception conditions, therefore this field must be set to zero. Report Count / Test Flag Number: Since test modes are not supported, this field reports Report Count only. But the media changer does not report Tape Alert events as Informational Exception conditions, therefore this field must be set to zero. Element Address Assignment page (1Dh) The Element Address Assignment Page is used to assign new addresses to the elements of the medium changer (via the Mode Select command) and to report those assignments (Mode Sense). When requested the media changer can store new element addresses in NVRAM. When stored in NVRAM these addresses will automatically become the default addresses after every power up. The format of the element address assignment page is shown in the next table. Note this page will only be stored in non volatile memory when the Host sets the SP bit in the CDB. Bit 7 6 5 4 3 2 1 0 Byte 0 Reserved SPF (0) Page Code (1Dh) 1 Additional Page Length (12h) 2 First Medium Transport Element Address 3 Number of Medium Transport Elements 4 First Storage Element Address 5 Number of Storage Elements 6 First Import / Export Element Address 7 Number of Import / Export Elements 8 First Data Transfer Element Address 9 Number of Data Transfer Elements 10 Reserved 11 Reserved 3-24 TL2000 and TL4000 SCSI Reference

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
Field
descriptions:
Perf:
When
this
bit
is
set
to
0,
this
indicates
that
informational
exception
operations
that
can
cause
delays
are
acceptable.
This
bit
should
be
set
to
zero.
Dexcpt:
When
this
bit
is
set
to
zero
the
reporting
method
indicated
by
the
MRIE
field
is
used.
When
this
bit
is
set
to
one
this
indicates
that
the
media
changer
shall
disable
all
information
exception
operations,
ignoring
the
MRIE
field
(In
this
mode
the
initiator
must
the
poll
the
Tape
Alert
log
page).
Currently
only
MRIE
mode
0
is
supported,
so
this
bit
is
ignored.
Test:
Test
modes
are
not
supported,
this
field
must
be
set
to
zero.
LogErr:
When
this
bit
is
set
to
0,
the
media
changer
shall
not
log
any
Tape
Alert
events.
When
this
bit
is
set
to
1,
the
media
changer
shall
log
Tape
Alert
events.
MRIE:
With
this
field
the
initiator
can
specify
the
method
used
by
the
media
changer
to
report
informational
exception
conditions
(Tape
Alert
events).
Currently
only
mode
0
is
supported.
This
means
that
Tape
Alert
flags
can
only
be
read
by
polling
with
the
LOG
SENSE
command
to
the
Tape
Alert
page.
Interval
Timer:
The
media
changer
does
not
report
Tape
Alert
conditions
as
Informational
Exception
conditions,
therefore
this
field
must
be
set
to
zero.
Report
Count
/
Test
Flag
Number:
Since
test
modes
are
not
supported,
this
field
reports
Report
Count
only.
But
the
media
changer
does
not
report
Tape
Alert
events
as
Informational
Exception
conditions,
therefore
this
field
must
be
set
to
zero.
Element
Address
Assignment
page
(1Dh)
The
Element
Address
Assignment
Page
is
used
to
assign
new
addresses
to
the
elements
of
the
medium
changer
(via
the
Mode
Select
command)
and
to
report
those
assignments
(Mode
Sense).
When
requested
the
media
changer
can
store
new
element
addresses
in
NVRAM.
When
stored
in
NVRAM
these
addresses
will
automatically
become
the
default
addresses
after
every
power
up.
The
format
of
the
element
address
assignment
page
is
shown
in
the
next
table.
Note
this
page
will
only
be
stored
in
non
volatile
memory
when
the
Host
sets
the
SP
bit
in
the
CDB.
Bit
7
6
5
4
3
2
1
0
Byte
0
Reserved
SPF
(0)
Page
Code
(1Dh)
1
Additional
Page
Length
(12h)
2
First
Medium
Transport
Element
Address
3
Number
of
Medium
Transport
Elements
4
First
Storage
Element
Address
5
Number
of
Storage
Elements
6
First
Import
/
Export
Element
Address
7
Number
of
Import
/
Export
Elements
8
First
Data
Transfer
Element
Address
9
Number
of
Data
Transfer
Elements
10
Reserved
11
Reserved
3-24
TL2000
and
TL4000
SCSI
Reference