`<div dir="ltr">Did some digging myself trying to find out the block size of the DC P3600 line and found that intel only specs the 400GB unit at 500MB/s for sequential writes, every other model in the DC line does 1000MB/s minimum. So the numbers I'm seeing are in line with what they should be capable of.<div><br><div>So, I have to re-eval using them as log/cache devices as they potentially are going to be a bottle neck. At least now I know it's not the OS it's the Hardware that's causing the numbers I saw. Sorry for the false alarm.</div><div><br></div><div>Josh C</div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Apr 8, 2016 at 4:16 PM, Steven Hartland <span dir="ltr"><<a href="mailto:killing@multiplay.co.uk" target="_blank">killing@multiplay.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="background-color:rgb(255,255,255);color:rgb(0,0,0)" bgcolor="#FFFFFF" text="#000000">
As a data point for you I just tried this on our NVMe box here and
got:<br>
dd if=/dev/zero of=bigfile1 bs=1M count=10240<span class=""><br>
10240+0 records in<br>
10240+0 records out<br></span>
10737418240 bytes transferred in 4.088757 secs <a href="tel:%282626083707" value="+12626083707" target="_blank">(2626083707</a>
bytes/sec)<br>
<br>
So ~2.6GB/s setup is a RAID2Z on 6 x Intel SSDPE2MD400G4 running
FreeBSD 10.2.<br>
<br>
During the test each disk does about 600-800MB/s<br>
<br>
Regards<br>
Steve</div></blockquote></div></div></div></div>
`