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

John Tyndall jtyndall at Crossroads.com
Tue Aug 13 06:48:26 PDT 2002


INCITS T11.3 Mail Reflector
********************************
It would be a good idea not to reassign the encoding, since =
reassignment could greatly complicate life for targets.

John Tyndall
Architect
Crossroads Systems Inc.
Email  : jtyndall at crossroads.com
Phone : 512-928-7282


-----Original Message-----
From: Charles Monia [mailto:cmonia at NishanSystems.com]=20
Sent: Monday, August 12, 2002 7:05 PM
To: 'Kevin D Butt'; Nixon, Bob
Cc: T10 Reflector (E-mail); T11 Reflector (E-mail)
Subject: [T11.3] Re: FC-FS: REC to revert to ELS


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
>=20
>=20
> * From the T10 Reflector (t10 at t10.org), posted by:
> * "Kevin D Butt" <kdbutt at us.ibm.com>
> *
>=20
> IBM Tape devices, Magstar 3590 and LTO Ultrium 358x devices have=20
> implemented the response REC as an FC4 Link Service.  We have also=20
> implemented our response to REC as an ELS.  We will respond in=20
> whatever manner the host makes the request,  either FC4 Link Service
> Response or ELS
> Response.  We do not issue a REC Request.
>=20
> 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
>=20
>=20
>                                                              =20
>                                                          =20
>                       "Nixon, Bob"                           =20
>                                                          =20
>                       <Bob.Nixon at emulex        To:      =20
> "T11. 3 Distribution (E-mail)" <t11_3 at mail.t11.org>, "T10     =20
>                       .com>                     distribution=20
> (E-mail)" <t10 at t10.org>                                   =20
>                       Sent by:                 cc:           =20
>                                                          =20
>                       owner-t10 at t10.org        Subject: =20
> FC-FS:  REC to revert to ELS                                  =20
>                                                              =20
>                                                          =20
>                                                              =20
>                                                          =20
>                       08/09/2002 03:13                       =20
>                                                          =20
>                       PM                                     =20
>                                                          =20
>                                                              =20
>                                                          =20
>                                                              =20
>                                                          =20
>=20
>=20
>=20
> This message is to inform the community of the decision of the FC-FS=20
> 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=20
> 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=20
> present that the
> behavior proposed reflects the actual implementation of all=20
> 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=20
> version of
> the FCP-2 specification.
>=20
>    - Bob Nixon, FC-FS working group secretary
>=20
>=20
>=20
>=20
> *
> * For T10 Reflector information, send a message with
> * 'info t10' (no quotes) in the message body to majordomo at t10.org
>=20

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