[T10] 答复: Question: when to close an STP connection for a STP target?
roweber at ieee.org
Sat Jan 23 05:33:58 PST 2016
My reading of Gerry's response allows the Expander to close a connection
in the way that your opinion describes.
All the best,
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!
> *发件人:*Gerry Houlder [mailto:gerry.houlder at seagate.com]
> *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
> 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:
> 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:
> Best wishes and Regards!
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