Re: iSCSI: Indication of final data-out sequence

[Rishabh Srivastav <rishabh_srivastav@yahoo.com>]

Julo,
I'm still not convinced.
There can be multiple data-out PDU's in response to
one R2T. In this case the F bit indicates the end of
sequence corresponding to that particular R2T and not
for the whole write operation. However, the
last_sequence bit in FC-FS is something which
indicates the final data IU for that whole exchange.
So, how can 'F' bit be equated to the last_sequence
bit ?? The semantics of 'F' bit is same as
last_sequence bit in the case of Data-In PDUs and not
in the case of data-out PDU. 
Where am i going wrong in my assumptions ?
Please clarify.
Thanks,
Rishabh

--- julian_satran@il.ibm.com wrote:
> 
> 
> the F bit. Julo
> 
> A doubt regarding the final sequence of data-out
> PDUs
> : My apologies if this had already been discussed
> long
> time ago. Couldn't locate it in the huge mail
> repository.
> In FC, the last sequence of an exchange is indicated
> by a 'Last_Sequence' bit in F_CTL of FC-FS header.
> What is the equivalent of it in iSCSI, specifically
> in
> the case of Data-Out ? If there is none, will not
> the
> presence of a similar bit be useful for iSCSI-FCP
> gateways ?
> 
> Thanks,
> Rishabh
> 



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