RE: Relation between the Initiator Task Tag and the execution state

[Black_David@emc.com]

> What is the execution state? How does it relate to the
> Intitator Task Tag if the task is a chain of commands?
> and how can we use the Initiator Task Tag to find the
> execution state of the command?

I believe that refers to SCSI execution state.  If the task
is a chain of commands, the ITT refers to the chain.  SCSI
requires/assumes that the task tag is usable to find the command
so that an operation like Abort Task works.  See SAM-2 for
further discussion of SCSI's command execution model.

Thanks,
--David
---------------------------------------------------
David L. Black, Senior Technologist
EMC Corporation, 42 South St., Hopkinton, MA  01748
+1 (508) 249-6449 *NEW*      FAX: +1 (508) 497-8500
black_david@emc.com         Cell: +1 (978) 394-7754
---------------------------------------------------

> -----Original Message-----
> From: Rohit B [mailto:b_rohitb@yahoo.com]
> Sent: Saturday, March 30, 2002 3:18 AM
> To: ips@ece.cmu.edu
> Subject: Relation between the Initiator Task Tag and the 
> execution state
> 
> 
> Section 2.2.2.1 says:
> 
> At the target, it is assumed that CmdSN is relevant
> only while the 
> command has not created any state related to its
> execution (execution 
> state); afterwards, CmdSN becomes irrelevant. Testing
> for the execution 
> state (represented by identifying the Initiator Task
> Tag) is assumed 
> to precede any other action at the target, and is
> followed by ordering 
> and delivery if no execution state is found or
> delivery if an 
> execution state is found.
> 
> What is the execution state? How does it relate to the
> Intitator Task Tag if the task is a chain of commands?
> and how can we use the Initiator Task Tag to find the
> execution state of the command?
> 
> Regards
> Rohit
> 
> 
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Greetings - send holiday greetings for Easter, Passover
> http://greetings.yahoo.com/
>