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Re: [Ips] Data-In ExpDataSN

> RFC 3720 says that Data-In/R2T PDU number is acknowledged by ExpDataSN filed of SCSI Response
 
Where?  Section 3.2.2.3 says:

    Data and R2T PDUs are implicitly acknowledged by status for the command.

> But if a target choose to send a Data-In PDU with S bit set instead of a SCSI Response .
> Where to get the ExpDataSN ? There is no such a field in Data-In PDU.

Not by that name, but the information is present.  The ExpDataSN
field in the SCSI Response PDU is "The number of R2T and Data-In
(read) PDUs the target has sent for the command."  That number can
be obtained from a Data-In PDU whose S bit is set to 1 by adding 1
to the value of that PDU's DataSN field.

Thanks,
--David

 

From: ips-bounces at ietf.org [mailto:ips-bounces at ietf.org] On Behalf Of yushang
Sent: Friday, September 25, 2009 2:31 AM
To: ips at ietf.org
Subject: [Ips] Data-In ExpDataSN

Dear all , RFC 3720 says that Data-In/R2T PDU number is acknowledged by ExpDataSN filed of SCSI Response . But if a target choose to send a Data-In PDU with S bit set instead of a SCSI Response . Where to get the ExpDataSN ? There is no such a field in Data-In PDU. Many thanks.