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    RE: iSCSI: version 0.6 - Query?



    Hi,
    
    > This is a very good question.  If "silently ignore" means that at the
    > time of receipt the target should not attempt to qualify the receipt of
    > the command at the time it received it, but instead attempt to resolve
    > this after the MaxCmdSN has been sent, then I would say it makes sense,
    > but your question interests me with regards to recovery.  Since section
    > 6.1 requires Targets to reject PDUs in a session with format errors
    > (assuming a misaligned CmdSN constitutes a format error) then it would
    > seem that this section on page 12 is not in agreement with recovery.
    
    	I didnot  see it explicitly stated in section 6.3 as it is done for 
    	DATA sequence number and STATUS sequence number. That is what 
    	i am expecting to be corrected in the subsequent revision if everybody
    	aggrees. And also remove the page 12 statement about "siliently 
    	Ignoring".
    	
    Thanks
    sureshtk
    	
    	
    	
    
    > 
    >  -----Original Message-----
    > From: 	Tanjore K. Suresh [mailto:Tanjore.Suresh@Sun.COM] 
    > Sent:	Sunday, June 10, 2001 12:26 AM
    > To:	ips@ece.cmu.edu
    > Subject:	iSCSI version 0.6 - Query?
    > 
    > Hi,
    > 
    > Page 12, Last paragraph.
    > 
    > Regarding the command sequence number.
    > 
    > " The target MUST silently *ignore* any command outside this range or
    > duplicates with in the range that have not been flagged with the retry
    > bit 
    > (the X bit in the opcode)"
    > 
    > 
    > Why ignore commands which are not in the expected range or duplicates
    > with in the range? This type of ignoring could  cause initator to
    > cause some unnecessary recovery activity which could/may end up to
    > be not good for the target which is hale and healthy. 
    > 
    > Such a  command could have been errorneously numbered or errorneously 
    > checked for this condition or errnoneously delivered with  sequence 
    > number change because of problems  transporting it over the internet
    > fabric.
    > 
    > Hence, my opinion is appropriate error need to be returned for such
    > command
    > instead of ignoring. 
    > 
    > 
    > Comments?
    > 
    > 
    > Thanks
    > sureshtk
    >  
    > 
    > I
    > 
    > 
    > 
    
    


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Last updated: Tue Sep 04 01:04:27 2001
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