[T10] Question: About the number of identify

Gerry Houlder gerry.houlder at seagate.com
Wed Mar 2 09:10:44 PST 2016


Yes, the reason for sending three IDENTIFY frames is so that a single bit
error in an IDENTIFY frame can be tolerated. The connection is successful
if at least one of the IDENTIFY frames is received without error by the
other end of the link.

On Mon, Feb 29, 2016 at 6:53 PM, Guojian (F) <guojian111 at hisilicon.com>
wrote:

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> *发件人:* Guojian (F)
> *发送时间:* 2016年2月26日 15:35
> *收件人:* t10 at t10.org
> *抄送:* Yangjunbin (Jim, HS); zhanggaochuan; Lilinhan (Linkin, Turing);
> Ningzuolin
> *主题:* Question: About the number of identify
>
>
>
> Hi,
>
> We know that identify frame can be sent one or three to the other side
> after speed negotiation completed.
>
> What I want to know is what is the consideration? Just ensure the other
> side can receive identify?
>
> Is there any chance that a SAS PHY will miss the first identify frame?
>
> Now I met a issue. When the host send just one identify frame, the HDD
> will occur receiving identify expired with little probability. This issue
> will be fixed when the host send three identify frame.
>
>
>
> Jason
>
>
>
> Attached Picture:
>
>
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