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    RE: iSCSI: Inquiry, Mode Sense, Read Capacity


    • To: <Black_David@emc.com>, <ips@ece.cmu.edu>
    • Subject: RE: iSCSI: Inquiry, Mode Sense, Read Capacity
    • From: "Lee Xing" <lxing@Crossroads.com>
    • Date: Wed, 3 Oct 2001 13:00:14 -0500
    • content-class: urn:content-classes:message
    • Content-Transfer-Encoding: 8bit
    • Content-Type: text/plain;charset="iso-8859-1"
    • Disposition-Notification-To: "Lee Xing" <lxing@Crossroads.com>
    • Sender: owner-ips@ece.cmu.edu
    • Thread-Index: AcFMIKyBukOweXuYS5e9c9w+keU/2wAB6kyg
    • Thread-Topic: iSCSI: Inquiry, Mode Sense, Read Capacity

    David,
    
    Thanks for the info.  It helps.  
    Please see my new question below.
    
    
    > Q2:
    > There are 10 target opcodes on page 43 of v.07, and two of 
    > them are specified as:
    > (-snip)
    
    See previous answer.  Data-in transfers data for any SCSI command
    that has data to transfer.  This includes all three of your examples.
    "READ" actually includes any SCSI command that transfers "data" (as
    that term is defined by SCSI) from Target to Initiator.  This includes
    INQUIRY, MODE SENSE, and READ CAPACITY.
    
    
    
    New Question:
    
    on page 23 of v.08, it says "For performance reasons, iSCSI allows 
    a "phase-collapse".  A command and its associated data may be 
    shipped together from initiator to target and data and responses 
    may be shipped together from targets."
    
    The question is if "Data-in transfers data for any SCSI command 
    that has data to transfer" (see the answer to Q2) is a true 
    statement, should we clear the above sentence (on page 23 of v.08) 
    a bit?
    
    Thanks.
    
    
    
    Lee 
    Crossroads Systems, Inc.
    
    


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Last updated: Wed Oct 03 15:17:26 2001
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