Re: StatSn Questions

[Matt Wakeley <matt_wakeley@agilent.com>]

julian_satran@il.ibm.com wrote:

> >In Data
> >and R2T, it just transfers the previous value (except if Data is the last
> Data
> >and conveys status).
> 
> StatSN in a read data PDU is *not* the previous value.  Instead, it is a
> new (incremented) value and the field is valid only if the S-bit is set.
> 
> +++ You are right - the reason I left StatSN out is that the Data PDU may
> originate close to the device where you don't know about StatRN +++

I don't understand the above statement.  The device is supposed to communicate
through iSCSI, and iSCSI always knows what the StatSN is (not the device). 
Therefore, if the "S" bit is not set in a data PDU, then the StatSN conveys
the current value.  If "S" is set, then StatSN conveys the new value.

-Matt Wakeley
Agilent Technologies