* TASK Vs TASK_SET
@ 2010-01-19 6:48 yukta eswar
2010-01-19 16:11 ` Douglas Gilbert
0 siblings, 1 reply; 2+ messages in thread
From: yukta eswar @ 2010-01-19 6:48 UTC (permalink / raw)
To: linux-scsi
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.
Thanks in advance,
Regards,
YE
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: TASK Vs TASK_SET
2010-01-19 6:48 TASK Vs TASK_SET yukta eswar
@ 2010-01-19 16:11 ` Douglas Gilbert
0 siblings, 0 replies; 2+ messages in thread
From: Douglas Gilbert @ 2010-01-19 16:11 UTC (permalink / raw)
To: yukta eswar; +Cc: linux-scsi
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
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