[CentOS] 3Ware 9550SX and latency/system responsiveness

[Feizhou]

Simon Banton wrote:
> At 20:52 +0800 13/9/07, Feizhou wrote:
>> Well, the first thing I noted was that the H8DA8 was not on the list 
>> of compatible motherboards on the 3ware website.
> 
> I challenged the vendor about that quite early on and was told that 
> they've used this combo before with no trouble, though I've yet to press 
> them on this point - but yes, that's a possibility I've not ruled out.
> 
> The card's running the latest firmware that I know about, certainly the 
> fw in codeset 9.4.1.2 is the version intended to go with the driver 
> supplied in CentOS 4.5.
> 
> It's definitely in the right slot, not using a riser and it's running at 
> the right speed:
> 
> //serv1> /c0 show all
> [snip]
> /c0 Controller Bus Type = PCIX
> /c0 Controller Bus Width = 64 bits
> /c0 Controller Bus Speed = 133 Mhz
> 

Hmm, how are you creating your ext3 filesystem(s) that you test on? Try 
creating it with a large journal (maybe 256MB) and run it in full 
journal mode.