SAS-1.1 CJTPAT

Kido Shogo kido-sxa at necst.nec.co.jp
Mon Mar 15 05:02:30 PST 2004


* From the T10 Reflector (t10 at t10.org), posted by:
* "Kido Shogo" <kido-sxa at necst.nec.co.jp>
*
Elliot san;

Thank you for your reply.

I have a question.

If phy detects error(ex. disparity error, CRC error) at receiving CJTPAT,
how should phy do?

Thanks,
Shogo Kido
NEC System Technologies, Ltd.
External:(+81)89-947-7901


> -----Original Message-----
> From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf 
> Of Elliott, Robert (Server Storage)
> Sent: Sunday, March 14, 2004 8:59 AM
> To: t10 at t10.org
> Subject: RE: SAS-1.1 CJTPAT
> 
> 
> * From the T10 Reflector (t10 at t10.org), posted by:
> * "Elliott, Robert (Server Storage)" <elliott at hp.com>
> *
> Every SAS phy should have a way to repeatedly generate 
> CJTPAT; otherwise it cannot be tested against the jitter 
> requirements.  There is currently no standard way to invoke 
> this; a mode page (in targets) or SMP page (in
> expanders) to put it into such a mode would suffice.
> 
> You should avoid sending ALIGNs during the pattern.
> 
> Since it's just a transmit pattern, I don't understand your 
> question about error primitives.  The pattern does not 
> normally flow through an expander.  Although the example in 
> table A.4 shows how to put the pattern into the format of an 
> SSP data frame, it's not really intended to be used as normal 
> SSP traffic flowing through an expander.
> 
> --
> Rob Elliott, elliott at hp.com
> Hewlett-Packard Industry Standard Server Storage Advanced 
> Technology https://ecardfile.com/id/RobElliott
> 
> 
> 
> 
> > -----Original Message-----
> > From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf
> > Of Kido Shogo
> > Sent: Monday, March 01, 2004 6:05 PM
> > To: t10 at t10.org
> > Subject: SAS-1.1 CJTPAT
> > 
> > 
> > * From the T10 Reflector (t10 at t10.org), posted by:
> > * "Kido Shogo" <kido-sxa at necst.nec.co.jp>
> > *
> > Hi all,
> > 
> > I have some questions about AnnexA compliant jitter test pattern
> > (CJTPAT) in SAS-1.1 rev3.
> > 
> > Should the expander generates the CJTPAT?
> > 
> > When the expander relays the CJTPAT,
> > should the expander does any special processing as follows for the 
> > CJTPAT?  Ex.
> >   does not insert ALIGN in the frame
> >   does not insert error primitive at error detection
> > 
> > Thanks,
> > Shogo Kido
> >  NEC System Technologies, Ltd.
> >  External:(+81)89-947-7901
> > 
> > *
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