PREEMPT service action

Ulrich, David dulrich at lsil.com
Wed Jul 17 07:33:50 PDT 2002


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* "Ulrich, David" <dulrich at lsil.com>
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Figure 3 found in 5.5.2.7.4 of SPC-3 rev. 7 seems to indicate that a
PREEMPT or PREEMPT AND ABORT service action can't preempt any
registrations unless there is a reservation on the lun.  However, the
text describing the service action doesn't explicitly state that.  The
closest text I can find is in 5.5.2.7.4.4 which states "... an
application client may remove the registration(s) without affecting any
persistent reservations by issuing a PERSISTENT RESERVE OUT command with
PREEMPT service action ...".

Does this imply that a reservation is a necessary condition for the
execution of this service action?  

Thanks in advance for clarification. 

Best regards, 

David Ulrich 
LSI Logic Storage Systems Division 


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RE: PREEMPT service action 
Figure 3 found in 5.5.2.7.4 of SPC-3 = rev. 7 seems to indicate that a PREEMPT or PREEMPT AND ABORT service = action can't preempt any registrations unless there is a reservation on = the lun.  However, the text describing the service action doesn't = explicitly state that.  The closest text I can find is in = 5.5.2.7.4.4 which states ;... an application client may remove the = registration(s) without affecting any persistent reservations by = issuing a PERSISTENT RESERVE OUT command with PREEMPT service action = ...;. Does this imply that a reservation is = a necessary condition for the execution of this service action?  = Thanks in advance for = clarification. Best regards, David Ulrich 
LSI Logic Storage Systems = Division 
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