Re: iSCSI: plugfest4 issues

["Robert D. Russell" <rdr@io.iol.unh.edu>]

Julian:

Only one minor issue came up today, Thursday, 1-August-2002, at the
iSCSI plugfest.


1. According to the change log for draft 11 (which, of course, is
   not part of the official draft), the TTT field was added to the
   Data-In PDU to carry information when the A bit is 1.  However,
   the way the standard is currently written, section 9.7.3 requires
   a valid Target Transfer Tag when the A bit is 1, but says nothing
   about its value when the A bit is 0, which implies that it may be
   valid but does not have to be valid.

   The question is, what use is a valid TTT in a Data-In PDU when
   the A bit is 0?  No reply is ever expected from the initiator
   in this case (because the A bit is 0), so the initiator can
   never use this TTT value in any future PDU.

   Perhaps the first sentence of the second paragraph of section
   9.7.3 should be modified to read:

   "On incoming data, the Target Transfer Tag MUST be provided by the
   target if the A bit is set to 1 and MUST be reserved otherwise."

Thank you for your consideration.


Bob Russell
InterOperability Lab
University of New Hampshire
rdr@iol.unh.edu
603-862-3774