Re: Data-In ExpDataSN
<[email protected]> Fri, 25 Sep 2009 10:43:44 -0400
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> RFC 3720 says that Data-In/R2T PDU number is acknowledged by ExpDataSN
filed of SCSI Response=20
=20
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
=20
________________________________
From: [email protected] [mailto:[email protected]] On
Behalf Of yushang
Sent: Friday, September 25, 2009 2:31 AM
To: [email protected]
Subject: [Ips] Data-In ExpDataSN
=09
=09
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.
=09
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<DIV><SPAN class=3D413092214-25092009>> RFC 3720 says that =
Data-In/R2T PDU=20
number is acknowledged by ExpDataSN filed of SCSI Response </SPAN></DIV>
<DIV><SPAN class=3D413092214-25092009><FONT face=3D"Courier New"=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D413092214-25092009><FONT face=3D"Courier New" =
size=3D2>Where? =20
Section 3.2.2.3 says:</FONT></SPAN></DIV>
<DIV><SPAN class=3D413092214-25092009><SPAN lang=3DEN>
<P><SPAN class=3D413092214-25092009> </SPAN>Data and =
R2T PDUs=20
are<SPAN class=3D413092214-25092009> </SPAN>implicitly acknowledged by =
status for=20
the command.</P>
<P><SPAN class=3D413092214-25092009>> But if a target choose to send =
a Data-In=20
PDU with S bit set instead of a SCSI Response .<BR>> </SPAN><SPAN=20
class=3D413092214-25092009>Where to get the ExpDataSN ? There is no such =
a field=20
in Data-In PDU.</SPAN></P>
<P><SPAN class=3D413092214-25092009><FONT face=3D"Courier New" =
size=3D2>Not by that=20
name, but the information is present. The ExpDataSN<BR>field in =
the SCSI=20
Response PDU is "<SPAN lang=3DEN>The number of R2T and Data-In<BR>(read) =
</SPAN></FONT></SPAN><SPAN class=3D413092214-25092009><FONT =
face=3D"Courier New"=20
size=3D2><SPAN lang=3DEN>PDUs the target has sent for the =
command." That=20
number can<BR>be </SPAN></FONT></SPAN><SPAN =
class=3D413092214-25092009><FONT=20
face=3D"Courier New" size=3D2><SPAN lang=3DEN>obtained from a Data-In =
PDU whose S bit=20
is set to 1 by adding 1<BR>to the value of that PDU's DataSN=20
field.</SPAN></FONT></SPAN><SPAN class=3D413092214-25092009><FONT=20
face=3D"Courier New" size=3D2><SPAN=20
lang=3DEN></P></SPAN></FONT></SPAN></SPAN></SPAN></DIV><!-- Converted =
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<P><FONT size=3D2>Thanks,<BR>--David<BR></FONT></P>
<DIV> </DIV><FONT face=3D"Courier New" size=3D2></FONT><BR>
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<HR tabIndex=3D-1>
<FONT face=3DTahoma size=3D2><B>From:</B> [email protected]=20
[mailto:[email protected]] <B>On Behalf Of =
</B>yushang<BR><B>Sent:</B>=20
Friday, September 25, 2009 2:31 AM<BR><B>To:</B>=20
[email protected]<BR><B>Subject:</B> [Ips] Data-In =
ExpDataSN<BR></FONT><BR></DIV>
<DIV></DIV>Dear all , RFC 3720 says that Data-In/R2T PDU number is=20
acknowledged by ExpDataSN filed of SCSI Response . But if a target =
choose to=20
send a Data-In PDU with S bit set instead of a SCSI Response . Where =
to get=20
the ExpDataSN ? There is no such a field in Data-In PDU. Many=20
thanks.<BR></BLOCKQUOTE></BODY></HTML>
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