Maxtor 10K III manual 111, 112, Read Keys Parameters-Field Descriptions

SCSI Description

Read Keys Parameters-Field Descriptions

The value in this field is a 32-bit counter in the device server that is incremented

each time a PERSISTENT 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 Release service action, or by a PERSIS-

TENT RESERVATION OUT command that is not done due to an error or a reservation

Generation&CVC￿(KGNF

conflict. The value in the Generation&GUETKRVKQPfield 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 cli-

ent doing the examination.

This field contains the count of the number of bytes that are in the Reservation Key

Additional

list (bytes 8 – ). Note that this field contains the number of bytes in the reservation

Length

key list regardless of the value prescribed by the Allocation Length field in the com-

mand’s CDB.

Each of the Reservation Keys appear as items in a list as bytes 8 through

. Each

Reservation

entry reflects an 8-byte reservation key registered with the device server via the PER-

SISTENT RESERVATION OUT, Reserve, Pre-empt, Pre-empt and Clear, or Register

Keys

service actions. Each key can be examined by the application client for correlation

with

set of initiators and SCSI ports

Table5-111

The data format and field descriptions for the Read Reservations Parameters are

described in Table 5-112and Table 5-113respectively.

Read Reservations Parameters-Data Format

$0[VG-$3KV

(MSB)

￿Generation￿

￿

￿￿

￿

￿

￿

(LSB)

4 - 7

(MSB)

Additional Length (

– 7)

(LSB)

8 -

(MSB)

2

Reservation Descriptors

(See Figure 5-53 / Table 5-55 for detail of a Descriptor Field)(LSB)

Table5-112

2

2

5-90

Maxtor Atlas 10K III

2