Table 5-107Read Reservations Parameters-Field Descriptions

 

 

Data Field

Description

 

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-

Generation

lease service action, or by a PERSISTENT RESERVATION OUT command that is not done due

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.

Additional

This field contains the count of the number of bytes of Reservation descriptors (bytes 8 – n). Note

that this field contains the number of bytes regardless of the value prescribed by the Allocation

Length

Length field in the command’s CDB.

 

 

 

Reservations De-

One Reservation descriptor is reported for each unique persistent reservation on the logical unit

when the PERSISTENT RESERVATION IN command has indicated a Read Reservations action.

scriptors

Table 5-112and Table 5-109detail the contents of each Reservation Descriptors field.

 

 

 

The data format and field descriptions for the PERSISTENT RESERVATION IN Read Reservations Descriptor are described in Table 5-108and Table 5-109respectively.

Table 5-108PERSISTENT RESERVATION IN Read Reservations Descriptor-Data Format

Bit

7

6

 

5

4

 

3

2

 

1

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0 - 7

(MSB)

 

 

 

Reservation Key

 

 

 

 

 

 

 

 

 

 

 

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8 - 11

(MSB)

 

 

 

Scope-Specific Address

 

 

 

 

 

 

 

 

 

 

 

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

 

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13

 

 

Scope

 

 

 

 

Type

 

 

 

 

 

 

 

 

 

 

 

 

 

14 - 15

(MSB)

 

 

 

Extent Length

 

 

 

 

 

 

 

 

 

 

 

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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