New Driver for MegaRaid 6Gb/s and 12Gb/s Card

[Desai, Kashyap]

> -----Original Message-----
> From: matt [mailto:sendtomatt at gmail.com]
> Sent: Thursday, April 18, 2013 8:05 PM
> To: Desai, Kashyap
> Cc: sbruno at freebsd.org; freebsd-scsi at freebsd.org; Kenneth D. Merry;
> McConnell, Stephen; jhb at freebsd.org
> Subject: Re: New Driver for MegaRaid 6Gb/s and 12Gb/s Card
> 
> On 04/17/13 23:25, Desai, Kashyap wrote:
> > As of now mfi driver support upto LSI's 6Gb/s Raid controller (Product
> > name "Thunderblot") "mrsas" driver is a new driver which will support
> > for "Thunderbolt" onwards product. So plan is mrsas driver is LSI's
> > recommended driver for 6Gb/s onwards Raid controller. We are also
> > going to provide priority choice for Thunderbolt controller (which is
> > currently supported in mfi). User can choose "mfi" Driver instead of
> > "mrsas" for Thunderbolt Controller. In summary, mfi will not have any
> > additional support for new controls and it will stop at Thunderbolt.
> > In long term, if all user switch to "mrsas" for Thunderbolt card, we
> > can also plan to remove support of "Thunderbolt" From "mfi"
> 
> What about other 6Gb/s controllers that are supported under mfi, such as
> Skinny Drake?

Skinny Drake will be supported by mfi.

Sorry if my earlier info was not clear. Every LSI MegaRaid HBA support which is currently available in "mfi" will not be changed.
It will be continue to be supported using "mfi".

Thunderbolt (6Gb/s Raid Card) was latest introduction of Raid controller from LSI, which was added in "mfi". Typically plan was to add thunderbolt onwards support in "mrsas", but due to business requirements LSI added Thunderbolt support in "mfi".

So here is summary.
Mfi driver is freeze in terms of adding new PnP IDs.
Mrsas driver starts with "Thunderbolt (Device id 0x005B) and continue to support all upcoming product of MegaRaid family.


> Would those only be supported by mfi, or by mrsas and mfi?
> Is there already a mrsasutil being planned to replace mfiutil?


New management interface will be expose by mrsas as "/dev/mrsasX". If mfiutil has flexibility to work on "/dev/mrsasX" instead of "/dev/mfiX" we can extend the same utility for mrsas.

> 
> Matt