[T11.3] Re: FC-FS: REC to revert to ELS

Charles Monia cmonia at NishanSystems.com
Mon Aug 12 17:04:32 PDT 2002


INCITS T11.3 Mail Reflector
********************************
Nit:

If implementations treat REC as either an FC-4 or extended link service,
does that imply the FC-4 encoding should never be reassigned?

Charles

> -----Original Message-----
> From: Kevin D Butt [mailto:kdbutt at us.ibm.com]
> Sent: Friday, August 09, 2002 5:22 PM
> To: Nixon, Bob
> Cc: owner-t10 at t10.org; T10 distribution (E-mail); T11. 3 Distribution
> (E-mail)
> Subject: Re: FC-FS: REC to revert to ELS
> 
> 
> * From the T10 Reflector (t10 at t10.org), posted by:
> * "Kevin D Butt" <kdbutt at us.ibm.com>
> *
> 
> IBM Tape devices, Magstar 3590 and LTO Ultrium 358x devices have
> implemented the response REC as an FC4 Link Service.  We have also
> implemented our response to REC as an ELS.  We will respond 
> in whatever
> manner the host makes the request,  either FC4 Link Service 
> Response or ELS
> Response.  We do not issue a REC Request.
> 
> Kevin D. Butt
> Fibre Channel & SCSI Architect
> IBM Tape Microcode,
> 6TYA, 9000 S. Rita Rd., Tucson, AZ  85744
> Tie-line 321; Office: 520-799-5280, Lab: 799-2869, Fax: 
> 799-4138, Email:
> kdbutt at us.ibm.com
> 
> 
>                                                               
>                                                           
>                       "Nixon, Bob"                            
>                                                           
>                       <Bob.Nixon at emulex        To:       
> "T11. 3 Distribution (E-mail)" <t11_3 at mail.t11.org>, "T10      
>                       .com>                     distribution 
> (E-mail)" <t10 at t10.org>                                    
>                       Sent by:                 cc:            
>                                                           
>                       owner-t10 at t10.org        Subject:  
> FC-FS:  REC to revert to ELS                                   
>                                                               
>                                                           
>                                                               
>                                                           
>                       08/09/2002 03:13                        
>                                                           
>                       PM                                      
>                                                           
>                                                               
>                                                           
>                                                               
>                                                           
> 
> 
> 
> This message is to inform the community of the decision of the FC-FS
> working group to
>       reestablish the Read Exchange Concise Extended Link Service as
>       defined in FC-FS version 0.30 (T11/00-340v1, July 2000);
>       recommend to T10 that, circumstances permitting, FCP-2 
> be revised to
>       reflect REC as an Extended Link Service rather than an FC-4 Link
>       Service; and
>       recommend to T10 that, should it be impractical to revise FCP-2,
>       FCP-3 be written to reflect REC as an ELS rather than 
> an FC-4 Link
>       Service, and implementers of FCP-2 be advised to 
> diverge from the
>       published standard in the same manner.
> This decision was motivated by the understanding of all 
> present that the
> behavior proposed reflects the actual implementation of all 
> products using
> REC.  The community is solicited to advise the T11.3 distribution (
> t11_3 at mail.t11.org) of contact information for any products known to
> implement the REC FC-4 Link Service as defined in the current 
> version of
> the FCP-2 specification.
> 
>    - Bob Nixon, FC-FS working group secretary
> 
> 
> 
> 
> *
> * For T10 Reflector information, send a message with
> * 'info t10' (no quotes) in the message body to majordomo at t10.org
> 

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