Maxtor 10K III Read Reservations P aramete rs-Fie ld Descriptions

SCS I Description

Read Reservations P aramete rs-Fie ld Descriptions

Generation

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

each t ime a P ERSISTE NT RESERVATION OUT command request s a Register, Clea r,

Pre-e mpt, or Pre -empt and Clea r operat ion. Note that PERSISTENT RESERVATI ON

IN com mands do not increment the counter, nor do PERSISTENT RESERVATION

OUT commands that perform a Reserve or Release servi ce action, or by a PERSIS-

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

confl ict. The va lue in t he Gen erat ion f ield is set t o 0 as par t of the pow er 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 exam ination.

Additi onal

Length

This fi eld contains the count of the number of bytes of Reservation descri ptors

(byt es 8 – ). Note that th is field c ontains the number of bytes regardl ess of th e val-

ue prescribed by the Al location Length field in the comm and’s CDB.

Reservations

Descriptors

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. Table 5-118 a nd Table 5-115 detail the conten ts of each Res-

ervation Descriptors field.

0 - 7 (MSB) Reservati on Key (LSB)

8 - 11 (MSB) Scope-Specific Addre ss (LSB)

12 Reserved

13 Scope Type

14 -

(MSB) Extent Length (LSB)