Reference Guide

Chapter 4 SCSI Commands
PERSISTENT RESERVE IN Command (5Eh)
DLT-S4 Interface Reference Guide 218
Figure 113 PERSISTENT
RESERVATION IN Type Mask
— Data Format
Table 120 PERSISTENT
RESERVATION IN Type Mas
k
— Field Descriptions
PTPL_C Always set to 1 indicating the drive support the APTPL feature.
TMV Always set to 1 indicating the Persistent Reservation Type Mark field is valid.
PTPL_A A Persist Through Power Loss Activated (PTPL_A) bit set to one indicates that
persist through power loss capability (see SPC-3) is activated because the most
recent successfully completed
PERSISTENT RESERVE OUT command with
REGISTER or REGISTER AND IGNORE EXISTING KEY service action had the APTPL
bit set to one in the parameter data. A PTPL_A bit set to zero indicates that the
persist through power loss capability is not activated.
Persistent
Reservation Type
Mask
The
PERSISTENT RESERVATION TYPE MASK field (see figure 113) contains a bit
map that indicates the persistent reservation types that are supported by the
device server.
Bit
7 6 5 4 3 2 1 0
Byte
4
WR_EX_A
R
EX_AC_R
O
WR_EX_RO
Reserve
d
EX_AC
Reserve
d
WR_EX Reserved
5 Reserved
EX_AC_A
R
Field Description
WR_EX_AR The WR_EX_AR bit is set to zero, indicating that the device server does not
support the Write Exclusive – All Registrants persistent reservation type.
Field Description