Renumber SAS device types

Elliott, Robert (Server Storage) Elliott at hp.com
Thu Oct 10 11:58:36 PDT 2002


* From the T10 Reflector (t10 at t10.org), posted by:
* "Elliott, Robert (Server Storage)" <Elliott at hp.com>
*
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Are the any objections to shifting the DEVICE TYPE field in the =
IDENTIFY
address frame and the SMP DISCOVER function from:

0 =3D end device=20
1 =3D edge expander device=20
2 =3D fanout expander device=20
3-7 =3D reserved=20

to:=20
0 =3D reserved  (or ignored?)=20
1 =3D end device=20
2 =3D edge expander device=20
3 =3D fanout expander device=20
4-7 =3D reserved=20

This would allow DISCOVER to return "0/reserved" rather than "0/end
device" for a phy that has no valid device attached. All the other
DISCOVER fields like the link rate fields return 0/reserved, not
something that looks like a valid value, in this situation.

--=20
Rob Elliott, elliott at hp.com=20
Industry Standard Server Storage Advanced Technology=20
Hewlett-Packard=20



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Renumber SAS device types Are the any objections to shifting the = DEVICE TYPE field in the IDENTIFY address frame and the SMP DISCOVER = function from: 0 =3D end device 
1 =3D edge expander device 
2 =3D fanout expander device 
3-7 =3D reserved to: 
0 =3D reserved  (or = ignored?) 
1 =3D end device 
2 =3D edge expander device 
3 =3D fanout expander device 
4-7 =3D reserved This would allow DISCOVER to return = ;0/reserved; rather than ;0/end device; for a phy = that has no valid device attached. All the other DISCOVER fields like = the link rate fields return 0/reserved, not something that looks like a = valid value, in this situation. -- 
Rob Elliott, elliott at hp.com 
Industry Standard Server Storage = Advanced Technology 
Hewlett-Packard 

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