Sony SDX-1100V/R User Manual page 113

PERSISTENT RESERVE IN
SCOPE: The value in this field indicates whether a persistent reservation applies to an entire logical unit to an
element. The value in this filed are defined in Table 6-60.
Code
0h Logical unit
1h Obsolete
2h Element (not supported in this drive)
3h-fh Reserved
Logical unit: A SCOPE value of logical unit indicates that the persistent reservation applies to the entire logical
unit. The logical unit scope will be implemented by all targets that implement PERSISTENT RESERVE OUT.
Element: A SCOPE filed value of Element indicates that the persistent reservation applies to the element of the
logical unit defined by the SCOPE-SPECIFIC Address field in the PERSISTENT RESERVE OUT parameter list.
The drive do not support it.
TYPE: The value in the TYPE filed specify the characteristics of the persistent reservation being established for all
data blocks within the element or within the logical unit. Table 6-61 defines the characteristic of the different type
values. For each persistent reservation type, Table 6-61 lists code value and describes the required target support.
In this table, the description of required target support is divided in two paragraphs. The first paragraph defines the
required handling for read operations. The second paragraph defines the required handling for write operations.
Code Name
0h
1h Write
Exclusive
2h
3h Exclusive
Access
4h
5h Write
Exclusive-
Registrants
Only
6h Exclusive
Access-
Registrants
Only (not
supported in
this drive)
7h-Fh Reserved
SONY AIT-5 drive SDX-1100V series Ver.1.0
Table 6-60: PERSISTENT RESERVATION SCOPE Codes
Name
Persistent reservation applies to the full logical unit
Obsolete
Persistent reservation applies to the specified element
Reserved
Table 6-61: PERSISTENT RESERVATION TYPE Codes
Obsolete
Reads Shared: Any application client on any initiator may execute tasks that
request transfers from the storage medium or cache of the logical unit to the
initiator.
Writes Exclusive: Any task from any initiator other than the initiator holding the
persistent reservation that requests a transfer from the initiator to the storage
medium or cache of the logical unit will result in a reservation conflict.
Obsolete
Reads Exclusive: Any task from any initiator other than the initiator holding the
persistent reservation that requests a transfer from the storage medium or cache of
the logical unit will result in a reservation conflict.
Write Exclusive: Any task from any initiator other than the initiator holding the
persistent reservation that requests a transfer from the initiator to the storage
medium or cache of the logical unit will result in a reservation conflict.
Obsolete
Reads Shared: Any application client on any initiator may execute tasks that
request transfers from the storage medium or cache of the logical unit to the
initiator.
Writes Exclusive: Any task from any initiator other than the initiator holding the
persistent reservation that requests a transfer from the initiator to the storage
medium or cache of the logical unit will result in a reservation conflict.
Reads Exclusive: A task that requests a transfer from the storage medium or
cache of the logical unit to an initiator that has not previously requested a
REGISTER service action with the drive will result in a reservation conflict.
Write Exclusive: Any task from any initiator other than the initiator holding the
persistent reservation that requests a transfer from the initiator to the storage
medium or cache of the logical unit will result in a reservation conflict.
6.Command Specification
Description
Description
6-59