SATA Port Multipliers in FreeBSD (6.3)

Daan Vreeken Daan at
Thu Mar 5 16:03:36 PST 2009

Hi Christopher,

On Thursday 05 March 2009 15:25:35 Christopher Key wrote:
> Hello,
> I'm looking to substantially expand the storage on my FreeBSD 6.3 home
> media server.  With regards hardware, the simplest way to attach large
> numbers of drives seem to be to use SATA port multipliers, but I've been
> unable to find any consensus on their level of support in FreeBSD.  I'm
> currently looking at a RocketRAID 2314 and SiI3726 based port
> multipliers.  Has any had any experience with this combination?

The Sil3726 works very well if you run a recent enough version of FreeBSD. We 
use the device in a custom storage appliance. I don't know the RocketRAID 
2314 though. You need a SATA 2.0 controller for Port Multipliers to work.

FreeBSD has (experimental) support for Port Multipliers since the following 
commit :

On Thursday 10 April 2008 15:05:05 Søren Schmidt wrote:
> sos         2008-04-10 13:05:05 UTC
>   FreeBSD src repository
>   Log:
>   Add experimental support for SATA Port Multipliers
>   Support is working on the Silicon Image SiI3124/3132.
>   Support is working on some AHCI chips but far from all.
>   Remember this is WIP, so test reports and (constructive) suggestions are
> welcome!

Daan Vreeken
tel: +31-(0)40-7113050 / +31-(0)6-46210825
KvK nr: 17174380

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