Re: TASK Vs TASK_SET

[Douglas Gilbert <dgilbert@interlog.com>]

yukta eswar wrote:
> Dear All,
> 
> I am a newbie in SCSI task management.
> When I read the sam-4 document, I got confusion about TASK and TASK_SET.
> Can anyone let me know the difference.

I think George Penokie (SAM-5 editor) is going through the
SAM-5 (draft) and changing many usages of "TASK" to "COMMAND".
So a TASK is usually a single SCSI command that is being
processed by a logical unit. A TASK_SET is a set of SCSI
commands that are being processed by a logical unit at a point
of time.

Notice that a task management function like ABORT TASK
takes a I_T_L_Q nexus (identifying a command identifier within
a logical unit) while ABORT TASK SET takes a I_T_L nexus
(identifying a logical unit).

Doug Gilbert