Date: Mon, 22 Aug 2016 18:52:07 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Karl Denninger <karl@denninger.net> Cc: freebsd-fs@freebsd.org Subject: Re: Recommended HBA for ZFS, contemporary Message-ID: <alpine.BSF.2.20.1608221835060.17619@wonkity.com> In-Reply-To: <580a6ea8-9c84-3e99-5a7d-7b2434c84e67@denninger.net> References: <alpine.BSF.2.00.1608221904270.82304@woozle.rinet.ru> <ba972848-140c-31a8-505e-2470ed750fc8@denninger.net> <alpine.BSF.2.00.1608221926550.82304@woozle.rinet.ru> <580a6ea8-9c84-3e99-5a7d-7b2434c84e67@denninger.net>
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On Mon, 22 Aug 2016, Karl Denninger wrote: > I have a number of the Intel 6-port expanders in production servers and > have never have had any trouble with them; they just plain work. The > only note I'll make on the expanders (and these host cards) is to make > sure you have sufficient airflow in the chassis; they're passive > heat-sink cooled so airflow matters. In any sort of proper server > chassis this is probably not going to be an issue but if you're going > for something that doesn't sound like an old 707 jet on take-off you > need to pay attention to make sure there's sufficient cooling airflow. There is an article on converting the Dell H200/H310 cards to LSI 9211 where they show a picture of a fan mounted on the heatsink but do not discuss it: https://techmattr.wordpress.com/2016/04/11/updated-sas-hba-crossflashing-or-flashing-to-it-mode-dell-perc-h200-and-h310/ I'm not happy with that article because it says "here is a CD of all the firmware and tools you need", but does not list sources to download them yourself . Call me crazy, but that makes me nervous. Anyway, I tried touching the heatsink of my new/used H200 while the card was idle, and yes, it gets surprisingly hot. Untouchably hot, some would say. A 40mm fan fits perfectly. The standard trick of using screws that just fit between the fins and bite in a little works. Like most, it was a 12V fan, but did not need that much power for this job. At 5V, it runs and keeps the heatsink cool enough to touch. I have another H200 to convert, and mean to document the process. I also have vendor sources for the files required.
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