SAS Target port transfer tag and first burst DATA frames

Elliott, Robert (Server Storage) Elliott at hp.com
Thu Jan 23 07:50:55 PST 2003


* From the T10 Reflector (t10 at t10.org), posted by:
* "Elliott, Robert (Server Storage)" <Elliott at hp.com>
*
They don't have to do so for COMMAND or TASK frames, but for DATA frames
I'll make that the rule.

--
Rob Elliott, elliott at hp.com
Hewlett-Packard Industry Standard Server Storage Advanced Technology
https://ecardfile.com/id/RobElliott




> -----Original Message-----
> From: George Penokie [mailto:gop at us.ibm.com] 
> Sent: Thursday, January 23, 2003 9:37 AM
> To: BillG at breatech.com
> Cc: Elliott, Robert (Server Storage); t10
> Subject: RE: SAS Target port transfer tag and first burst DATA frames
> 
> Initiator's should set this to 0xFFFF until the target tells 
> them otherwise in a Xfer_Rdy frame.
> 
> Bye for now,
> George Penokie
> 
> Dept 2C6  114-2 N212
> E-Mail:    gop at us.ibm.com
> Internal:  553-5208
> External: 507-253-5208   FAX: 507-253-2880
> 
>                                                                    
>                       "Bill Galloway"                         
>                                                                    
>                       <BillG at breatech.c        To:       
> <Elliott at hp.com>, <t10 at t10.org>                               
>           
>                       om>                      cc:            
>                                                                    
>                       Sent by:                 Subject:  RE: 
> SAS Target port transfer tag and first burst DATA frames            
>                       owner-t10 at t10.org                       
> * From the T10 Reflector (t10 at t10.org), posted by:
> * "Bill Galloway" <BillG at breatech.com>
> *
> I think we should require the initiator to set it to FFFFh 
> for first burst write data.
> 
> Bill Galloway
> BREA Technologies, Inc.
> BillG at breatech.com
> P: (281) 530-3063
> F: (281) 988-0398
> 
> -----Original Message-----
> From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf 
> Of Elliott, Robert (Server Storage)
> Sent: Wednesday, January 22, 2003 6:03 PM
> To: t10 at t10.org
> Subject: SAS Target port transfer tag and first burst DATA frames
> 
> 
> The SAS protocol WG decided to relax the rules on the TARGET 
> PORT TRANSFER TAG so the target and initiator can choose any 
> value they want outside of XFER_RDY frames and write DATA 
> frames in response to XFER_RDY frames.
> 
> Should we require the initiator set the target port transfer 
> tag to any particular value (e.g. FFFFh) for write DATA 
> frames that contain first burst data?  If we don't, this 
> feature will be unusable for targets using first bursts 
> (since the initiator could choose a value that matches one of 
> the target's XFER_RDY-indicated tags).
> 
> --
> Rob Elliott, elliott at hp.com
> Hewlett-Packard Industry Standard Server Storage Advanced 
> Technology https://ecardfile.com/id/RobElliott 
<https://ecardfile.com/id/RobElliott>




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