Seagate 77767496 Manual De Usuario

254

Fibre Channel Interface Manual, Rev. D

The Persistent Reserve Out command is used to request service actions that reserve a logical unit or element 
for the exclusive or shared use of a particular initiator. This command is used in conjunction with the Persistent 
Reserve In command and should not be used with the Reserve and Release commands.

Initiators performing Persistent Reserve Out service actions are identified by a reservation key provided by the 
application client. An application client may use the Persistent Reserve In command to identify which initiators 
are holding a persistent reservation and use the Persistent Reserve Out command to preempt that reservation 
if required.

If a Persistent Reserve out command is attempted, but there are insufficient device server resources to com-
plete the operation, the device server returns a Check Condition status. The sense key is set to Illegal Request 
and the additional sense data is set to Insufficient Registration Resources.

The Persistent Reserve Out command contains fields that specify a persistent reservation service action, the 
intended scope of the persistent reservation, and the restrictions caused by the persistent reservation. If a 
Scope field specifies a scope that is not implemented, the device server returns a Check Condition status. The 
sense key is set to Illegal Request and the additional sense data is set to Invalid Field in CDB.

Fields in the Persistent Reserve out parameter list specify the information required to perform a particular per-
sistent reservation service action.  

Control 
See Control Byte in Section 11.2.1.6.
Parameter List Length 
24 (18h)

If the parameter list length is set to something other than 24, the device server returns a Check Condition 
status, the sense key is set to Illegal Request, and the additional sense data is set to Parameter List Length 
Error.

Scope 
See definition on page 252. If the Scope field specifies a scope that is not implemented, the device server returns a Check 
Condition status, the sense key is set to Illegal Request, and additional sense data is set to Invalid Field in CDB.

0

0

1

0

1

1

1

1

1

1

Reserved

Service Action

2

Scope

Type

3

Reserved

4

Reserved

5

Reserved

6

Reserved

7

(MSB)

Parameter List Length (18h)

8

(LSB)

9

Control

5Fh