SAS under/over flow

Gary.Franco at emulex.com Gary.Franco at emulex.com
Tue Sep 11 15:29:37 PDT 2007


* From the T10 Reflector (t10 at t10.org), posted by:
* Gary.Franco at Emulex.Com
*
Eddy,
You don't see it because it is not there!
This has been a bone of contention with me since day one, but I guess
they did not want to "take" too much from fibre channel.
To me this is a shortcoming, and there is no way for the sas device to
report an underflow/overflow in a check condition mainly because the SSP
frame does not carry the data length for the i/o (like in fibre
channel). If the SSP target does not know how much is being requested
for a read or write, it is pretty hard to report these conditions
without it.
Sometimes, these are not necessarily catastrophic failings.
Ok, time to fold up my soapbox and head to the watering hole!
-----Original Message-----
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of Eddy
Quicksall
Sent: Tuesday, September 11, 2007 4:35 PM
To: t10 at t10.org
Subject: SAS under/over flow
* From the T10 Reflector (t10 at t10.org), posted by:
* "Eddy Quicksall" <Quicksall_iSCSI at bellsouth.net>
*
How does the initiator determine underflow or overflow? I don't see it
in the response frame. 
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