SORT BY:

LIST ORDER
THREAD
AUTHOR
SUBJECT


SEARCH

IPS HOME


    [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

    Re: iSCSI:Clear Task Set



    John,
    
    The LUN is just a mistake there - in all three instances it should be LU.
    The definitions are in accordance with SAM . There are two task management 
    modes - tasks sets-per-initiator at each LU or common for all initiators. 
    The mode is a SCSI issue controlled by a field in the Control-Mode page.
    Clear task set MAY clear all the tasks in the task set - even if common to 
    all initiators if that is the way the task set is managed. That is also 
    the difference between clear-task-set and abort task set.
    
    Julo
    
    
    
    
    
    
    
    John Hufferd@IBMUS
    23-11-01 11:29
    
     
            To:     Julian Satran/Haifa/IBM@IBMIL@IBMDE
            cc:     ips@ece.cmu.edu
            From:   John Hufferd/San Jose/IBM@IBMUS
            Subject:        iSCSI:Clear Task Set
    
     
    
    Julian, and List  (using v 0.9)
    In point 9.4, just before 9.5  the Table entry associated with Clear Task 
    Set applies to:
    
    "All tasks associated with the specified LUN and initiator. For all other 
    initiators all tasks at LUN with no regard to order."
    
    Perhaps we mean LU here, but I know that the iSCSI layer does not have 
    information about LU, only about the LU Number (LUN) in the command.  We 
    can not tell, at the iSCSI layer, if the  LU represented  by a LUN on 
    Session 1, has any relationship to any LUN on any other session.
    
    This is because each initiator may have their own numbering for LUs. 
    Therefore, do we just pass the Clear Task Set to the SCSI layer and hope 
    for the best, or does the iSCSI layer also suppose to apply the Clear Task 
    Set to all the sessions that it has coming into the iSCSI (SCSI) Target 
    Port?  If the latter, again how will that work when the iSCSI layer has no 
    idea what LU an Initiator's LUN will map to?
    .
    .
    .
    John L. Hufferd
    Senior Technical Staff Member (STSM)
    IBM/SSG San Jose Ca
    Main Office (408) 256-0403, Tie: 276-0403,  eFax: (408) 904-4688
    Home Office (408) 997-6136, Cell: (408) 499-9702
    Internet address: hufferd@us.ibm.com
    
    
    
    
    


Home

Last updated: Fri Nov 23 17:17:39 2001
7892 messages in chronological order