Date: Wed, 01 Oct 2008 11:31:03 -0500
From: Shawn Authement <Shawn.Authement@texmemsys.com>
To: t10@t10.org
Subject: Re: I_T nexus loss
X-Message-Number: 9148
Formatted message: HTML-formatted message

A big thank you to all who responded!  I was just wondering if anyone 
may know where I can reference the situations which cause an implicit 
LOGO/PRLO, or maybe is this a better question to ask T11?  FC-LS-2 
section 6.4.4 seems to be vague on the issue, and doesn't mention this case.
Thanks,
-- 
Shawn Authement
Sr. Software Engineer
Texas Memory Systems, Inc.
Shawn.Authement@texmemsys.com
ph: +1.713.266.3200
Kevin D Butt wrote:
>
> Shawn,
>
> Yes, when an N_Port performs a PLOGI/PRLI it logs in again.  This can 
> be viewed as an implicit LOGO/PRLO and as stated in 4.11 of FCP-4 
> (http://www.t10.org/ftp/t10/drafts/fcp4/fcp4r01.pdf) this generates an 
> I_T nexus loss notification.
>
> Regards,
>
> Kevin D. Butt
> SCSI & Fibre Channel Architect, Tape Firmware
> MS 6TYA, 9000 S. Rita Rd., Tucson, AZ 85744
> Tel: 520-799-2869 / 520-799-5280
> Fax: 520-799-2723 (T/L:321)
> Email address: kdbutt@us.ibm.com
> http://www-03.ibm.com/servers/storage/
>
>
> From: 	Shawn Authement <Shawn.Authement@texmemsys.com>
> To:	t10@t10.org
> Date: 	09/24/2008 12:17 PM
> Subject:	I_T nexus loss
>
>
> ------------------------------------------------------------------------
>
>
>
> * From the T10 Reflector (t10@t10.org), posted by:
> * Shawn Authement <Shawn.Authement@texmemsys.com>
> *
> All,
>
> I am currently researching device behavior with respect to N_Port login
> and was wondering if anyone can provide clarification.
>
> Q: If an already-logged-in N_Port performs login again (via PLOGI), is
> this considered an I_T nexus loss as defined by SAM-3, 6.3.4?
>
> The ENDL Fibre Channel Bench Reference implies that re-Login causes an
> implicit Logout.  However, I cannot find any supporting information in
> either the FCP-3 for FC-LS specifications.  My goal is to ultimately
> determine whether a SCSI Target Port should set a Unit Attention if a
> SCSI Initiator Port re-logs in.
>
> Thank you for your your help!
>
> -- 
> Shawn Authement
> Sr. Software Engineer
> Texas Memory Systems, Inc.
> Shawn.Authement@texmemsys.com
> ph: +1.713.266.3200
>
> *
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