Re: SAM-2 w/ multiple ports

[Ralph Weber <ralphoweber@compuserve.com>]

Sandeep,

The responses to your questions about the SAM-2 multi-port
model are as follows:

> 1) "..Any task that is sent to a logical unit that is not known
>    to the task router shall be routed to the default logical
>    unit (e.g. LUN 0).
>
> This seems to conflict with the contents of Sec 5.8.3 (Incorrect
> LU selection).  What is the rationale behind this statement ?

The Task Router cannot form the response to incorrect logical
unit selection that is described in 5.8.3.  Therefore, the
Task Router is obliged to route the task to the default
logical unit, who can form the response.

> 2)  "Any task management function that is
>    not sent to a specific logical unit shall be broadcast to
>    all logical units known to the task router"
>
> Isnt this already covered under specific task functions anyways
> or is it intended to address some new functionality ?

The mechanism described is present to provide the routing necessary
to effect the requirements stated in the specific task management
function descriptions.

In summary, the routing requirements in question are present
to make the Task Router an operative participant in existing
SCSI model requirements, not to instantiate new requirements.

Thanks.

Ralph...