On Mon, Apr 16, 2012 at 10:31 AM, Glyn Astill <glynastill(at)yahoo(dot)co(dot)uk> wrote:
>> From: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
>>On Mon, Apr 16, 2012 at 8:13 AM, Cesar Martin <cmartinp(at)gmail(dot)com> wrote:
>>> Finally the problem was BIOS configuration. DBPM had was set to "Active
>>> Power Controller" I changed this to "Max
>>> Performance". http://en.community.dell.com/techcenter/power-cooling/w/wiki/best-practices-in-power-management.aspx
>>> Now wirite speed are 550MB/s and read 1,1GB/s.
>>Why in the world would a server be delivered to a customer with such a
>>setting turned on? ugh.
> Because it's Dell and that's what they do.
> When our R910s arrived, despite them knowing what we were using them for, they'd installed the memory to use only one channel per cpu. Burried deep in their manual I discovered that they called this "power optimised" mode and I had to buy a whole extra bunch of risers to be able to use all of the channels properly.
> If it wasn't for proper load testing, and Greg Smiths stream scaling tests I don't think I'd even have spotted it.
See and that's where a small technically knowledgeable supplier is so
great. "No you don't want 8 8G dimms, you want 16 4G dimms." etc.
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