Re: ISCSI: need to fix handling of partial data transfers

[Paul Koning <ni1d@arrl.net>]

Excerpt of message (sent 16 March 2002) by Julian Satran:
> 
> Paul,
> 
> We have different opinions on basics.
> If I enter into an appliance shop and ask for a bottle of milk - I get an
> "error message".
> It may fall in one of two categories:
> 
>    "protocol error" (in humanes - "you are an idiot")
>    "we don't keep milk"
> 
> 
> I agreed that the first was not nice and I will change it.
> But there are errors from which you have no recovery - the devices can't
> work with each other.

I think we're actually pretty much in agreement here.

My point is this:

Right now the spec says "you can ask for milk in an appliance store,
but the shopkeeper is allowed to tell you 'no'".  I'm proposing to say
"you cannot ask for milk in an appliance store".

The outcome is the same either way: the devices discover that they
can't talk to each other.  But the second rule is simpler.

So that's why I proposed to make the rule "you must answer with
exactly the data length asked for (R2T) or negotiated (unsolicited
data length)".

     paul