PHY numbering within a Wide Port

Elliott, Robert (Server Storage) Elliott at
Mon Aug 29 07:32:37 PDT 2005

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

> From: Bill Martin
> From SAS 1.1, it is required that a device have all of 
> its PHYs numbered consecutively from 1 to the maximum number 
> of PHYs.  Is there any requirement that the PHYs in a wide
> port be consecutively numbered.  I do not currently find
> any restrictions on the numbering of PHYs in a wide port.

There is no such requirement.

Even if the phys are eventually sequential, as they power at
up different times the wide port is bound to have periods where
they appear not to be.
Rob Elliott, elliott at 
Hewlett-Packard Industry Standard Server Storage Advanced Technology 

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