[T10] 答复: Question: when to close an STP connection for a STP target?

Ralph Weber roweber at ieee.org
Sat Jan 23 05:33:58 PST 2016


Jason,

My reading of Gerry's response allows the Expander to close a connection 
in the way that your opinion describes.

All the best,

.Ralph

On 1/20/2016 8:20 PM, Guojian (F) wrote:
>
> Hi Gerry,
>
> */The behavior you describe makes sense to me./*
>
> ---Do you mean that the behavior of Expander never closing a 
> connection makes sense?
>
> In my opinion, it is more reasonable that Expander can close a 
> connection according to bus idle time and other SATA device sending 
> commands require.
>
> Best Regards!
>
> Jason
>
> *发件人:*Gerry Houlder [mailto:gerry.houlder at seagate.com]
> *发送时间:*2016年1月21日4:30
> *收件人:*Guojian (F)
> *抄送:*t10 at t10.org
> *主题:*Re: [T10] Question: when to close an STP connection for a STP 
> target?
>
> The behavior you describe makes sense to me.
>
> Remember that the expander device probably has a small number of 
> connection to an initiator and a larger number of connections to 
> devices. Further, the devices could be a mix of SATA devices and SAS 
> devices. When a SATA device isn't actively accepting or sending 
> commands or data then it sends SATA_SYNC. This is like being idle on 
> the bus. At this point, the expander can disconnect from the initiator 
> as well and prepare to service a new connection between that same 
> initiator and a different device (maybe a SAS device that will use SSP 
> protocol rather than STP protocol).
>
> On Wed, Jan 20, 2016 at 2:30 AM, Guojian (F) <guojian111 at hisilicon.com 
> <mailto:guojian111 at hisilicon.com>> wrote:
>
> Hi,
>
>    We can see an example of STP target closing an connection. But I 
> didn’t find any description about the condition of STP target closing 
> an connection. So I want to know when to close an STP connection if 
> the target opened it.
>
>    Most of the expander I have seen won’t close the connection after 
> it sent all the frame even through the target opened it. And the 
> connection will be closed by initiator when its max connection timer 
> or max bus inactive timer expired.
>
>    Is this kind of target behavior reasonable?
>
> The example:
>
> Thankyou!
>
> Best wishes and Regards!
>
>
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