REC ELS parameter field

Dale LaFollette Dale.Lafollette at Sun.COM
Tue Mar 17 10:44:53 PDT 2009


* From the T10 Reflector (t10 at t10.org), posted by:
* Dale LaFollette <Dale.Lafollette at Sun.COM>
*
Hello,
Sun T10k drives set REC.LS_ACC.Word5 = 0.
Dale LaFollette
Kevin Jones wrote:
> * From the T10 Reflector (t10 at t10.org), posted by:
> * "Kevin Jones" <kev at bri.hp.com>
> *
> I'm confused.
>
> Are we talking about to REC.LS_ACC.Word5 (Frame header parameter)
> or REC.LS_ACC.Word10 (Frame Payload FC4VALUE) see FCP4 section 6.5 ?
>
> HP LTO drives set REC.LS_ACC.Word5 = 0.
> HP LTO drives set REC.LS_ACC.Word10 = bytes read/written.
>
>
> Kevin Jones
>
> ===========================================================================
> Hewlett-Packard Limited registered Office:
> Cain Road, Bracknell, Berks RG12 1HN
> Registered No: 690597 England
>
> The contents of this message and any attachments to it are confidential
> and may be legally privileged. If you have received this message in error,
> you should delete it	from your system immediately and advise the sender.
>
> To any recipient of this message within HP, unless otherwise
> stated you should consider this message and attachments as
> "HP CONFIDENTIAL".
>
>
>
> On Tue, 17 Mar 2009 14:23:52 -0000, Kevin D Butt <kdbutt at us.ibm.com> wrote:
>
>   
>> In response to the question sent on the reflector:
>>
>> FCP-4 folks: FC-LS requires that ?The value of the Parameter field in the
>> Frame_Header of an REC ELS and an LS_ACC in response to an REC ELS shall
>> be specified by the FC-4 that sends the frame.? FCP-4 specifies the value
>> of the Parameter field for the ELS but not for the LS_ACC.
>> What do people actually do for the LS_ACC? Is it consistent enough to say
>> something in FCP-4?
>>
>>
>> The parameter field of LS_ACC is the same as the parameter field of REC
>> ELS, unless an error occurs internal to the tape drive which requires the
>> entire command to be redriven.  In that case, the parameter field of the
>> LS_ACC is set to zero to indicate an FCP_RO of zero.  The intent is for
>> the initiator port to discard any previously received data and redrive the
>> command by sending an SRR with a relative offset of zero.
>>
>> Kevin D. Butt
>> SCSI & Fibre Channel Architect, Tape Firmware
>> MS 6TYA, 9000 S. Rita Rd., Tucson, AZ 85744
>> Tel: 520-799-5280
>> Fax: 520-799-2723 (T/L:321)
>> Email address: kdbutt at us.ibm.com
>> http://www-03.ibm.com/servers/storage/
>>     
>
> *
> * For T10 Reflector information, send a message with
> * 'info t10' (no quotes) in the message body to majordomo at t10.org
>   
*
* For T10 Reflector information, send a message with
* 'info t10' (no quotes) in the message body to majordomo at t10.org



More information about the T10 mailing list