RE: iSCSI : iSCSI parameter default values

[Robert Snively <rsnively@Brocade.COM>]

Dave,

Of course there can, but during normal operation, all of
them are either data or commands, since SCSI has no other
outbound transactions from an initiator.  In either case,
they are useful functions that overlap and make proper use
of the link during any latency periods.  

If a target is capable of handling data immediately following
a command (by allowing any form of unsolicited data, immediate
or not), then a wise initiator will help the target along by
providing that data in a timely fashion.  That could be as 
soon as a few nanoseconds after the command, whether or not
the data was in a separate PDU.

Bob

> -----Original Message-----
> From: Dave Sheehy [mailto:dbs@acropora.rose.agilent.com]
> Sent: Monday, October 01, 2001 3:35 PM
> To: ips@ece.cmu.edu
> Subject: RE: iscsi : iscsi parameter default values
> 
> 
> 
> Robert,
> 
> > For these problems, immediate data and unsolicited data are
> > equivalent.  Frankly, I see no functional difference between
> > sending data in the same PDU and sending data in an immediately
> > following PDU.  
> 
> I just want to point out that the data is NOT required to be in an 
> immediately following PDU. There can be any number (up to MaxCmdSN) of
> intervening non-data PDUs between the command and data.
> 
> Dave
> 
>