Maxtor Atlas 10K V Product Manual page 133

Table 5-105
Data Field
The value in this field is a 32-bit counter in the device server that is incremented each time a PER-
SISTENT RESERVATION OUT command requests a Register, Clear, Pre-empt, or Pre-empt and
Clear operation. Note that PERSISTENT RESERVATION IN commands do not increment the
counter, nor do PERSISTENT RESERVATION OUT commands that perform a Reserve or Re-
lease service action, or by a PERSISTENT RESERVATION OUT command that is not done due
Generation to an error or a reservation conflict. The value in the Generation field is set to 0 as part of the power
on or reset processes.
The value in the Generation field allows the application client that examines the value to verify
that the configuration of the initiators attached to a logical unit has not been modified by another
application client without any notification of the application client doing the examination.
This field contains the count of the number of bytes that are in the Reservation Key list (bytes 8 –
Additional
n). Note that this field contains the number of bytes in the reservation key list regardless of the
Length
value prescribed by the Allocation Length field in the command's CDB.
Each of the Reservation Keys appear as items in a list as bytes 8 through n. Each entry reflects an
8-byte reservation key registered with the device server via the PERSISTENT RESERVATION
Reservation Keys
OUT, Reserve, Pre-empt, Pre-empt and Clear, or Register service actions. Each key can be exam-
ined by the application client for correlation with a set of initiators and SCSI ports
The data format and field descriptions for the Read Reservations Parameters are
described in Table 5-106 and Table 5-107 respectively.
Table 5-106
Bit
Byte
(MSB)
0 - 3
(MSB)
4 - 7
(MSB)
8 - n
Read Keys Parameters-Field Descriptions
Read Reservations Parameters-Data Format
7 6 5
(See Figure 5-53 / Table 5-55 for detail of a Descriptor Field)(LSB)
Description
4 3
Generation
Additional Length (n – 7)
Reservation Descriptors
Maxtor Atlas 10K V
2 1 0
(LSB)
(LSB)
5-75