I'm surprised that you can actually turn it on without a battery. I suspect that this is not a write-through/write-back cache but be forewarned that if there's no battery, it's possible that things you thought were written to the hard drive on shutdown/restart/hang/crash might not ever be written to the hard drive(s)
Craig
On Sep 1, 2011, at 4:17 PM, Austin Godber wrote:
> Hi Craig,
>
> Thanks for the suggestion. I would if I could. I'd also probably try another file system. Though the good news is, enabling the write cache on that array has improved things significantly. Which, in my case, was:
>
> tw_cli /c2/u0 set cache=on
>
> Now, if only I had the battery backup unit for the card.
>
> Thanks, everyone for their suggestions. For now I am happy with the situation, but I'd be interested to hear the experiences of others.
>
> Austin
>
> On Thu, Sep 1, 2011 at 3:58 PM, Craig White <craig.white@xxxxxxxxxx> wrote:
>
> On Sep 1, 2011, at 1:41 PM, Austin Godber wrote:
>
> > Hello,
> >
> > Does anyone have experience using a 3ware 9650SE series raid controller on CentOS 6.0?
> ----
> use RAID 10
>
> Unless something has changed, RAID 5 is notoriously slow on the 3Ware controllers. Whatever you do will only incrementally speed things up. If performance is desired, RAID 5 is not the way to go.
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