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    Unsolicited Data Questions



    Hi Julian
    
    Sorry if I'm covering old ground...
    
    Is it possible to use unsolicited data for the first burst and then request
    any remaining data using R2T?  For example, if the target has a previously
    allocated buffer available (length defined by FirstBurstSize) for
    unsolicited data, then once the initiator has sent unsolicited data up to
    and including this amount then the remaining data (if any) can be requested
    using R2T once the target has the buffer space available.
    
    Section 1.2.5 pertains to this..  "An initiator may send unsolicited data
    either as immediate (up to the negotiated  maximum PDU size - DataPDULength
    - disconnect-reconnect mode page) or in a separate PDU sequence (up to the
    negotiated limit - FirstBurstSize - disconnect-reconnect mode page). All
    subsequent data  has to be solicited"
    
    However, Appendix D - 22 ImmediateData" appears to contradict this:   "If
    ImmediateData is set to no and UseR2T is set to yes then the initiator MUST
    NOT send unsolicited data and the target MUST reject them with the
    corresponding response code."
    
    Also I have some comments from my colleagues:
    
    Page 15: Last paragraph is unclear from 2nd sentence.  The hyphens look like
    minus signs. All a bit confusing.
    Page 16: There are several references to initial burst. Should these not be
    changed to first burst to be consistent with the terminology used
    subsequently in the spec especially since this it's the "FirstBurstSize"
    which defines how much data can be accepted.
    page 111: The spec says that you need to set immediateData to yes so that
    you can receive a first burst of immediate data, but then "only
    immediate data are accepted in the first burst".  If you have immediate data
    set to no and R2T set to yes you can't accept any unsolicited data: Are you
    stating that immediate data and "normal" unsolicited data can not be mixed. 
    
    1) Section 2.13.1: Is the response to a NOP-In issues by the target, always
    a NOP-out?
    
    2) Appendix D 29: KeyValueText: default value is outside of parameter range.
    
    Cheers
    
    Matthew Burbridge
    Hewlett Packard, Bristol
    Telnet: 312 7010
    E-mail: matthewb@bri.hp.com
    
    


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Last updated: Tue Sep 04 01:05:13 2001
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