Sense data descriptor length in 01-199r3

Gerry.Houlder at seagate.com Gerry.Houlder at seagate.com
Tue Feb 5 07:19:11 PST 2002


* From the T10 Reflector (t10 at t10.org), posted by:
* Gerry.Houlder at seagate.com
*

I agree that SCSI tradition for length fields is that the length value
reflects
only the number of bytes AFTER the length field.



                                                                                                    
                    Ralph Weber                                                                     
                    <ralphoweber at compu        To:     "T10, Reflector" <T10 at t10.org>                
                    serve.com>                cc:                                                   
                    Sent by:                  Subject:     Sense data descriptor length in 01-199r3 
                    owner-t10 at t10.org                                                               
                                                                                                    
                                                                                                    
                    02/05/02 06:45 AM                                                               
                    Please respond to                                                               
                    roweber                                                                         
                                                                                                    
                                                                                                    




* From the T10 Reflector (t10 at t10.org), posted by:
* Ralph Weber <ralphoweber at compuserve.com>
*
Approved document 01-199r3 specifies that the
descriptor length field in the new request
sense format includes not only the length
byte itself but also the descriptor type
code field that precedes the length field
in the sense data descriptor format.

My understanding of the SCSI tradition is
that length fields always include only
the bytes that follow the length field:

  - Never the length field bytes, and
  - Never ever any bytes that precede
    the length field.

I am "editing" 01-199r3 to reflect my
understanding of how SCSI length fields
work as part of incorporating it in
SPC-3 r04.

If my understanding is wrong, please
notify me ASAP.

Thanks.

Ralph...




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