Re: Read data chunk size and segmentation negotiation

[julian_satran@il.ibm.com]

Mark,

Interesting questions - but why?

Why should the initiator care about the chunks (it has already reserved the
memory when issuing the read) and about how many - the target is going to
tell him when it is over by the Status or Response.

Could you elaborate?

Thanks,
Julo

Mark Burton <markb@ordern.com> on 23/11/2000 13:28:23

Please respond to Mark Burton <markb@ordern.com>

To:   ips@ece.cmu.edu
cc:
Subject:  Read data chunk size and segmentation negotiation





Folks,

Given the definition of the SCSI Data Response format in Section 2.8
and the example in Appendix B of draft-ietf-ips-iscsi-01.txt it
appears necessary for the initiator and the target to agree on the
maximum amount of data that can be sent in a single SCSI Data
response.

Another issue is that either the initiator should be required to
accept multiple data responses containing the content for a single
read or it should have some means of informing the target that it will
not accept multiple data responses per read i.e. the read data must
not be segmented.

I guess additional login keys could be added to negotiate these
constraints.

Regards,

Mark