LSI Logic 1068E and SATA port replicators (Sil3726)

LSI Logic 1068E and SATA port replicators (Sil3726)

[Martin Scholl]

Hello all,


[disclaimer: what follows is probably a really stupid idea after all.]

We would like to use a LSI SAS 1068E board with Sil3726 SATA port
replicators. This obviously "fails" in that only 1 disk out of the 5
connected is actually visible.

I found, if SATA drivers are to support a port multiplier, they inhert
from sata_pmp_port_ops. Is an analog infrastructure available for the
sas-based HBAs to support SATA port multipliers? (BTW is such a setup
actually supported form a protocol point of view?)

I'm not a regular kernel hacker, so I cannot really help you in getting
quality sata mpm support (if possible after all) into the sas drivers.
What I can definitely offer is my time and will to test the driver
modifications you would send me.



Martin

Re: LSI Logic 1068E and SATA port replicators (Sil3726)

[Douglas Gilbert]

Martin,
There is mention of SATA port selectors in the SAS spec
(optional functionality in a SAS expander I think) but
no mention of SATA port multipliers.
The reason might be that a SAS expander already includes the
functionality of a SATA port multiplier.

The "ATA architectural notes" in Annex J of sas2r16.pdf found
at www.t10.org might help.

Doug Gilbert


Martin Scholl wrote:
> Hello all,
> 
> 
> [disclaimer: what follows is probably a really stupid idea after all.]
> 
> We would like to use a LSI SAS 1068E board with Sil3726 SATA port
> replicators. This obviously "fails" in that only 1 disk out of the 5
> connected is actually visible.
> 
> I found, if SATA drivers are to support a port multiplier, they inhert
> from sata_pmp_port_ops. Is an analog infrastructure available for the
> sas-based HBAs to support SATA port multipliers? (BTW is such a setup
> actually supported form a protocol point of view?)
> 
> I'm not a regular kernel hacker, so I cannot really help you in getting
> quality sata mpm support (if possible after all) into the sas drivers.
> What I can definitely offer is my time and will to test the driver
> modifications you would send me.
> 
> 
> 
> Martin
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