Kamakaze mode for packetized

Gerry_Houlder at seagate.com Gerry_Houlder at seagate.com
Mon Jul 31 11:00:33 PDT 2000


* From the T10 Reflector (t10 at t10.org), posted by:
* Gerry_Houlder at seagate.com
*
I believe the definition has a key term you are overlooking. The definition
has "pCRC bytes" in it, which people are supposed to recognize as being
unique to parallel phase mode data transfers. Packetized transfers have
"iuCRC" bytes rather than "pCRC" bytes. I know this is a real nit and it
took me a while to accept this as a sufficient definition, but in absence
of better wording it will have to do.

I hope that all the frequent T10 attendees accept that "data groups" means
non-packetized DT data transfers and "information units" means packetized
DT data transfers. If we have that agreement, then maybe the definitions
can be refined a bit to make the distinction plainer.





Gene_Milligan at Seagate.COM@t10.org on 07/31/2000 11:30:55 AM

Sent by:  owner-t10 at t10.org


To:   t10 at t10.org
cc:

Subject:  Kamakaze mode for packetized


* From the T10 Reflector (t10 at t10.org), posted by:
* Gene_Milligan at seagate.com
*
With the smoke and mirrors I think the wrong target was hit.

SPI-4 rev 0 history states:
      <<c) Made data group transfers prohibited on paced data transfers per
plenary vote.>>


The definition of data group in SPI-4 is:

      <<3.1.18 data group: A sequence of data bytes, any pad bytes, and the
four pCRC bytes during a DT DATA
IN phase or a DT DATA OUT phase.>>

           Packetized has a sequence of data bytes, any pad bytes, and uses
the four byte CRC during DT DATA IN and DT DATA OUT phase. Was the kamikaze
using a boomerang? Did it hit the wrong target as well?

Gene


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