Re: Read data chunk size and segmentation negotiation

[Stephen Bailey <steph@cs.uchicago.edu>]

Robert Elliott,

> * Maximum Burst Length - limits the maximum burst that a target
> may use.  This lets the initiator limit data bursts to meet its 
> buffering requirements.  This field is required in all FCP targets.

This parameter is basically pointless in FCP(-2).  All it does is
force the target to split returned data into multiple FC sequences
(bursts).  There is no flow control on the individual bursts in the
target->initiator direction analogous to the FCP XFR_RDY (for the
initiator->target direction).  Whether the target sends all the data
as a single FC sequence, or multiple back-to-back FC sequences, the
buffering requirement is the same---the entire transfer.  That's OK
too, 'cause of the SAM assumption that buffers for the entire transfer
will be available before the command is executed.

Steph