Re: iSCSI : Command Ordering Proposal.

[Matt Wakeley <matt_wakeley@agilent.com>]

Santosh Rao wrote:

> I need to add some more clarity on the discussion here. It was not my intent
> to suggest that CmdSN NOT be used for simple task tags. My suggestion
> was that the targets use CmdSN to enforce ordering only when an ordered
> task tag enters the task set and for the tasks that are older than the ordered
> task tag in the task set.

Without CmdSN or CRN you could not guarantee what simple tasks get into the
queue before or after the ordered task. CRN is new and in an unfinished
standard (SAM-2 r15).  Therefore, I believe you need CmdSN ordering to handle
"legacy" SCSI stacks that don't know this new feature.

-Matt