<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On Jul 18, 2013, at 8:23 PM, "Schweiss, Chip" <<a href="mailto:chip@innovates.com">chip@innovates.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">I have used LSI HBAs exclusively. Performance and reliability has been very good.<br><br>The only problem I have consistently seen is if I hotplug a sas expander with or without disks attached it will crash the system at least half the time. I have simple resolved never doing that hot. <br></blockquote><div><br></div><div>This was a known bug in the mptsas driver more than a year ago. The root cause was</div><div>related to the driver trying to manage LEDs. IIRC, a fix was integrated upstream as part</div><div>of a set of changes in May 2012. If your experience is with a later release, then please</div><div>file a bug at <a href="http://illumos.org">illumos.org</a>.</div><div> -- richard</div><br><blockquote type="cite">
<br>I have stuck with LSI because of using LSI SAS expanders to keep the communication across venders to the minimum. The last thing I want is to be in the middle of finger pointing between venders.<br><br>-Chip<br><br>
<br>
<div class="gmail_quote">On Thu, Jul 18, 2013 at 7:03 PM, Saso Kiselkov <span dir="ltr"><<a href="mailto:skiselkov.ml@gmail.com" target="_blank">skiselkov.ml@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>On 18/07/2013 23:48, Tobias Oetiker wrote:<br>
> Folks,<br>
><br>
> We are specing a new omnios server box ... and were just told by<br>
> our vendor, that LSI HBAs were much slower (50%) than Areca Controllers<br>
> running in JBOD mode ... and that they would therefore recommend<br>
> Areca (we use areca for raid6 in linux boxes, but have never used it in JBOD<br>
> mode with illumos, yet).<br>
><br>
> Which controller would you choose for a new system ?<br>
<br>
</div>Hi Tobi,<br>
<br>
I'm using LSI exclusively, never had an issue with them. Their 6G SAS<br>
HBAs are very affordable and remarkably solid. As for the ARECA vs LSI<br>
debate, I'd contest that there's going to be any appreciable performance<br>
difference. *IF* you're running in JBOD, the card should essentially be<br>
a simple pipe for SCSI commands to the SAS bus with as little overhead<br>
possible. I know for a fact that saturating a 6G SAS link isn't a<br>
problem with LSI cards, so I'm somewhat at a loss as to where the<br>
performance difference is supposed to lie.<br>
<br>
Cheers,<br>
<span><font color="#888888">--<br>
Saso<br>
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