Dell PowerVault TL4000 SCSI Reference Guide - Page 60

Parameter, Length, Field, descriptions, Reservation, Service, Action, Scope-Specific, Address, APTPL

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 60 highlights

0h 1h 2h 3h - Fh Persistent reservation applies to the full logical unit Obsolete Persistent reservation applies to the specified element Reserved Parameter List Length: The Parameter List Length shall be set to the length of the Persistent Reserve Out Parameter List structure. PERSISTENT RESERVE OUT Parameter List The format for the reservation descriptor is shown below. There shall be a reservation descriptor for the persistent reservation, if any, present in the logical unit and a reservation descriptor for each element, if any, having a persistent reservation. Bit 7 6 Byte 0 (MSB) 7 8 (MSB) 15 16 (MSB) 19 20 21 22 (MSB) 23 5 4 3 2 Reservation Key Service Action Reservation Key Scope-Specific Address Reserved Reserved Obsolete 1 0 (LSB) (LSB) (LSB) APTPL (LSB) Field descriptions: Reservation Key: The Reservation Key field contains a value provided by the application client to the device server to identify the initiator that is the source of the PERSISTENT RESERVE OUT command. Service Action Reservation Key: For the Register, and Register and Ignore Existing Key service action, the Service Action Reservation Key contains the new registration key to be registered. For the Preempt, and Preempt and Abort service actions, the Service Action Reservation Key field contains the reservation key of the persistent reservations that are being preempted. The Service Action Reservation Key field is ignored for all other service actions. Scope-Specific Address: If the Scope is an Element Scope reservation, the Scope-Specific Address field shall contain the element address (zero filled in the most significant two bytes). APTPL: The Activate Persist Through power Loss (APTPL) bit shall be valid only for the Register, or the Register and Ignore Existing Key service action. In all other cases the APTPL bit shall be ignored. 3-46 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
0h
Persistent
reservation
applies
to
the
full
logical
unit
1h
Obsolete
2h
Persistent
reservation
applies
to
the
specified
element
3h
-
Fh
Reserved
Parameter
List
Length:
The
Parameter
List
Length
shall
be
set
to
the
length
of
the
Persistent
Reserve
Out
Parameter
List
structure.
PERSISTENT
RESERVE
OUT
Parameter
List
The
format
for
the
reservation
descriptor
is
shown
below.
There
shall
be
a
reservation
descriptor
for
the
persistent
reservation,
if
any,
present
in
the
logical
unit
and
a
reservation
descriptor
for
each
element,
if
any,
having
a
persistent
reservation.
Bit
7
6
5
4
3
2
1
0
Byte
0
(MSB)
Reservation
Key
7
(LSB)
8
(MSB)
Service
Action
Reservation
Key
15
(LSB)
16
(MSB)
Scope-Specific
Address
19
(LSB)
20
Reserved
APTPL
21
Reserved
22
(MSB)
Obsolete
23
(LSB)
Field
descriptions:
Reservation
Key:
The
Reservation
Key
field
contains
a
value
provided
by
the
application
client
to
the
device
server
to
identify
the
initiator
that
is
the
source
of
the
PERSISTENT
RESERVE
OUT
command.
Service
Action
Reservation
Key:
For
the
Register,
and
Register
and
Ignore
Existing
Key
service
action,
the
Service
Action
Reservation
Key
contains
the
new
registration
key
to
be
registered.
For
the
Preempt,
and
Preempt
and
Abort
service
actions,
the
Service
Action
Reservation
Key
field
contains
the
reservation
key
of
the
persistent
reservations
that
are
being
preempted.
The
Service
Action
Reservation
Key
field
is
ignored
for
all
other
service
actions.
Scope-Specific
Address:
If
the
Scope
is
an
Element
Scope
reservation,
the
Scope-Specific
Address
field
shall
contain
the
element
address
(zero
filled
in
the
most
significant
two
bytes).
APTPL:
The
Activate
Persist
Through
power
Loss
(APTPL)
bit
shall
be
valid
only
for
the
Register,
or
the
Register
and
Ignore
Existing
Key
service
action.
In
all
other
cases
the
APTPL
bit
shall
be
ignored.
3-46
TL2000
and
TL4000
SCSI
Reference