Re: SAS and iSCSI

[Dave.B.Anderson@seagate.com]

There are no new opcodes or CDB's in SAS.  The thing the questioner might
be thinking of is the additional SAS task management information located
after the header and before the start of the CDB in a command frame.  This
is unique to SAS, and I would not think it will appear as such in iSCSI.

Dave



                                                                                                                        
                    Andre Hedrick                                                                                       
                    <andre@pyxtechnol        To:     Julian Satran <Julian_Satran@il.ibm.com>, Black_David@emc.com      
                    ogies.com>               cc:     ips@ece.cmu.edu                                                    
                    Sent by:                 Subject:     Re: SAS and iSCSI                                             
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                    09/02/2002 02:04                                                                                    
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Julian and David,

Thanks for the reply and update, I guess the second part never made it to
the reflector.

Will the additional opcodes and command descriptor blocks that
are definied in SAS be transferred using additional header segements by
the iSCSI transport?

This assumes there will be new opcodes as SAS is very much ontrack to be
an API for array management.  Specifically where many of the current
management applications of heavily mated to SCSI and SAS is a means to
grant them extended life, whereas the hardware is dying.  So in order to
acommidate such dependencies, the concern is to insure that iSCSI will be
adaptable to address their over short comings to be so tightly tied to a
transport layer and semi dependent of physical layers.

Cheers,

Andre Hedrick
iSCSI Software Solutions Provider
http://www.PyXTechnologies.com/