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@ttiltd.com 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.