User Manual

SCSI Commands Reference Manual, Rev. J 124
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
The format of the full status descriptors is shown in table 87. Each full status descriptor describes one or more registered I_T
nexuses. The device server shall return persistent reservations status information for every registered I_T nexus.
RESERVATION KEY field
The RESERVATION KEY field contains the reservation key.
R_HOLDER (Reservation Holder) bit
1 A Reservation Holder (R_HOLDER) bit set to one indicates that all I_T nexuses described by this full status descriptor are registered and
are persistent reservation holders.
0 A R_HOLDER bit set to zero indicates that all I_T nexuses described by this full status descriptor are registered but are not persistent res-
ervation holders.
Table 87 PERSISTENT RESERVE IN full status descriptor format
Bit
Byte
7 6 5 4 3 2 1 0
0 (MSB)
RESERVATION KEY. . .
7 (LSB)
8
Reserved. . .
11
12 Reserved ALL_TG_PT R_HOLDER
13 SCOPE TYPE
14
Reserved. . .
17
18 (MSB)
RELATIVE TARGET PORT IDENTIFIER
19 (LSB)
20 (MSB)
ADDITIONAL DESCRIPTOR LENGTH (N-23). . .
23 (LSB)
24
TRANSPORTID. . .
n