On 10/27/2016 10:05 AM, Eneko Lacunza wrote:
Hi,
Not trolling, just curious about a thing you said...
El 26/10/16 a las 18:20, Michael Rasmussen escribió:
I also need the battery for smart arrays?
If you do not plan to use ZFS, which sort of nullifies the use of a
RAID controller, then yes. If you care for your data a BBU is
absolutely vital and will give you a noticeable performance boost.
I understand that BBU improves performance, but in what way does it
"care for your data - absolutely vital"?
My understanding is that in fact it does add some risk to your data if
RAID controller fails - bye bye write cache data!
The BBU will store your unwritten cached data in case of a power failure
and write it down after power has been restored. W/o BBU, you would
loose that data completely. Of course, if you don't use cache, you also
don't need the BBU ;-)
And if the RAID controller is broken, you have a big problem anyway, no
matter if you use caching or not ;-)
frank
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