[CentOS] SAS/SATA DAS

Peter Arremann loony at loonybin.org
Tue Sep 2 17:32:29 UTC 2008


Hi,

I assume you're talking about the MSA60? We have several of those installed 
and haven't seen any bottle necks there. Even the fastest SATA drives fall 
short of the 150MB/sec max SATA I throughput. And if you could push the 
1.5Gb/sec on the SATA side, then the SAS side with a 4x port (4x3Gb/sec) 
would become your bottleneck. 

Peter.


On Tuesday 02 September 2008 11:23:00 am Joseph L. Casale wrote:
> I need to replace a slow HP MSA20 that’s a bottleneck right now (We are an
> HP shop). HP’s only option with 3.5” SATA drives is stuck at SATA I behind
> a SAS controller. Dell makes an MD1000 that claims SATA II speeds behind a
> SAS Perc 5/E (Don’t know anything about dell). 
> Anyone got any real world info they can share? I need 3.5” SATA II at least
> 12 drives behind SAS, I am not concerned about space and could use multiple
> 1u chassis if I had to. 
> Thanks!




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