Echo Buffer mode for READ/WRITE BUFFER
Gene_Milligan at notes.seagate.com
Gene_Milligan at notes.seagate.com
Tue Nov 24 14:46:05 PST 1998
* From the T10 (formerly SCSI) Reflector (t10 at symbios.com), posted by:
* Gene_Milligan at notes.seagate.com
*
<<The echo buffer mode allows the use of READ/WRITER buffer commands during
normal I/O operations;>>
I thought this was for special setup operations known as domain
validation not for normal I/O operations.
<<The echo buffer shall be the same buffer as used when the WRITE BUFFER
command with the mode field set to echo buffer was issued.>>
This should be "shall transfer the same data as when the WRITE BUFFER"
<<The READ BUFFER command shall return the same number of bytes of data as
sent in the prior WRITE BUFFER command.>>
This should be same number as received.
<<An echo buffer is assigned in the same manner by the target as it would
for a write operation.>>
This seems to be an idle and unnecessary statement.
<<Upon successful completion of a WRITE BUFFER command the data shall be
preserved in the echo buffer unless there is an intervening media-access
command.>>
Go on to say "in which case it may be changed."
Gene
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