SAS Programmed Physical Link Rates

Elliott, Robert (Server Storage) elliott at
Wed Oct 8 16:17:40 PDT 2003

* From the T10 Reflector (t10 at, posted by:
* "Elliott, Robert (Server Storage)" <elliott at>

> -----Original Message-----
> From: Gil Romo [mailto:gil.romo at] 
> Sent: Wednesday, October 08, 2003 5:10 PM
> To: t10 at
> Subject: SAS Programmed Physical Link Rates
> * From the T10 Reflector (t10 at, posted by:
> * Gil Romo <gil.romo at>
> *
> I feel the standard is incomplete in the description of this subject.
> The SMP Discover response frame contains pairs of hardware 
> and programmed 
> physical link rate values.  It is the programmed physical 
> link rate values that 
> should be used during the phy reset sequence, right?


> Clause 6 uses terms such as "lowest supported", "slowest 
> supported", and 
> "highest supported" physical link rates.

Since clause 6 is not strictly for expanders, tying it to the 
PROGRAMMED field names may be misleading too.

We can work on lowest/slowest and highest/fastest consistency.

> Subclause 7.13 uses "MAXIMUM PHYSICAL LINK RATE", which is 
> not the complete field name.

It should have PROGRAMMED in front of it.

> ------------
> Gilbert Romo
> Circuits & Integration
> QLogic Corporation, Aliso Viejo, California
> Office: 949-389-6266
> E-mail: gil.romo at

Rob Elliott, elliott at
Hewlett-Packard Industry Standard Server Storage Advanced Technology

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