[CentOS] SATA vs. SAS

[Feizhou]

>>>> Option 1) 2 servers each having 2.0TB raid disk with SAS 
>>>> drives, 2GB ram and standard other features. 
>>> If going down this road, why not look into getting one of
>>> those fancy new storage enclosures where the RAID is built
>>> into the enclosure and can allow 2 servers to simultaneously
>>> access the arrays with full battery backed write-back cache?
>>>
>> What is available for Linux in this department?
> 
> I'm testing out an MD3000 from Dell. It can allow 4 hosts with
> single 4x serial paths, or 2 hosts with redundant 4x serial
> and can chain up to 2 MD1000s off it for up to 45 spindles.
> 
> It was 2 RAID controllers in 2 EMMs with 512MB BBU write-back
> that is synchronized between them which act as redundant RAID
> controllers. Ships with 4 plain-jane 2 path SAS controllers
> for host systems.
> 
> Downside, right now, it currently only supports SAS drives,
> they hope to have a SAS/SATA firmware update maybe by year-end.

Binary drivers from Dell?