RE: iSCSI: keys/parameter dependence

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

Julian:

I came across another dependency in draft 12-96 (but it has been
in the drafts for some time):

The end of section 11.20 says:

   "If ErrorRecoveryLevel is not 0 and if DataSequenceInOrder is set to
   Yes, a target may retry at most the last R2T, and an initiator may at
   most request retransmission for the last read data sequence.
   MaxOutstandingR2T MUST be set to 1 in this case."

It is unclear to me from reading this just what the "in this case"
refers to -- does it mean:

1) if MaxOutstandingR2T is not 1 then the target may not retry and
   the initiator may not request retransmission.

or

2) the combination ErrorRecoveryLevel > 0 and DataSequenceInOrder=Yes
   requires MaxOutStandingR2T=1.

If the first interpretation is correct, then this is not really a
dependency between the keys, but a subtle restriction on behavior
from a certain combination of keys.

If the second interpretation is correct, then this is a dependency
between keys.

Whichever interpretation is correct, I would suggest that the statement
in section 11.20 be reworded to make the interpretation unambiguous.

Thanks,
Bob Russell