Table 6-61 Reservation Descriptors Format - Sun Microsystems storagetek sl500 Reference Manual

Persistent Reserve In
TABLE 6-61
Reservation Descriptors Format
Byte 7
0 (MSB)
to
7
8 (MSB)
to
11
12
13
14
to
15
Reservation Descriptors Format Definitions:
Reservation Key
Scope
Type
172 SL500: Interface Reference Manual • July 2008
6 5 4
Reservation Key
Reserved (00h)
Scope
Obsolete (00h)
This value indicates the reservation key for the descriptor data that follows.
The value in the Scope field indicates whether a persistent reservation applies
to an entire logical unit or to an element. The only valid value is 0h.
0h = The persistent reservation applies to the logical unit
This value specifies the characteristics of the persistent reservation.
Valid values are 3h and 6h.
3h = Exclusive Access:
■
This value indicates that the initiator holding the persistent reservation has
exclusive read and write access. If any other initiator requests a data transfer
to or from the target, the result will be a reservation conflict.
6h = Exclusive Access, Registrants Only:
■
This value indicates that any currently registered initiator has exclusive read
and write access.
If any non-registered initiator requests a data transfer to or from the target, the
result will be a reservation conflict.
Bit
3 2
Obsolete
1 0
(LSB)
(LSB)
Type
Revision: F • 96122