[CentOS] 3ware 9550 series

Chris Mauritz chrism at imntv.com
Sat Mar 4 01:06:48 UTC 2006

Jure Pečar wrote:
> On Fri, 3 Mar 2006 19:04:53 -0500
> Peter Arremann <loony at loonybin.org> wrote:
>> - nothing helped. Whenever I had high IO loads the system would crash. 
>> Eventually disabling write cache reduced the IO enough for the system to be 
>> stable. 
> I've heard that from many different sources now - it really looks like certain 3wares and tyans don't like eachother.

It's the motherboard.  The bios has some "issues" and it seems to gobble 
up an ungodly amount of option rom memory space.  Tyan blames 
nvidia...blah blah blah...So boards like the 9550 and other RAID 
controllers get "crowded out" leading to unpredictable performance issues.

You can try freeing more some more option rom space. Go to the bios menu 
and in Advanced\Intergrated Device\Mac Opt scan set to (disabled). Also, 
disable the nvidia onboard raid controller. If you've got a pci-e video 
card, that can also hog a lot of option rom space.

I had an issue with my RAID card being recognized at all until I did 
some of the above and finally got it to the point where things were 
recognized enough to update everyone's firmware.  Now it all plays 
nicely together.

Lastly, Tyan's tech support was an absolute nightmare to deal with.  The 
highpoint people were pleasant, quick to respond, and very helpful.  
I've also had very pleasant experiences with 3Ware so perhaps they might 
be able to help with the performance issues with their board and this 


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