Date: Mon, 22 Aug 2016 19:30:19 +0300 (MSK) From: Dmitry Morozovsky <marck@rinet.ru> To: Karl Denninger <karl@denninger.net> Cc: freebsd-fs@freebsd.org Subject: Re: Recommended HBA for ZFS, contemporary Message-ID: <alpine.BSF.2.00.1608221926550.82304@woozle.rinet.ru> In-Reply-To: <ba972848-140c-31a8-505e-2470ed750fc8@denninger.net> References: <alpine.BSF.2.00.1608221904270.82304@woozle.rinet.ru> <ba972848-140c-31a8-505e-2470ed750fc8@denninger.net>
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Karl, On Mon, 22 Aug 2016, Karl Denninger wrote: > I'm still a fan of the LSI SAS-9211 cards along with (for higher > density) a SAS port expander. I've been extremely happy with this > combination with one caveat -- most systems must boot from the actual > card and not a port on the expander(s) you connect to it due to BIOS > constraints. They're also crazily cost-effective on-balance. > > In practice this means you have 4 ports on the base card available (2 > used for mirrored boot drives, 2 for other things) and the rest of the > disks go on the expander, or you run more than one card. > > Whether you can actually saturate this combination depends on what you > attach. In large configurations, especially those stuffed with SSDs, > you can -- at which point something faster such as the 93xx series which which immediately leads me to the question: what is the driver supporting 9300 in HBA mode? Quick googling does not reveal interoperability, and 9300 is not in hardware list for FreeBSD yet. > are materially faster (but still in "host" mode as opposed to any sort > of "smart", "raid" or "buffered" mode) should be considered. > > The "smarter" the card the dumber the results tend to be when ZFS is in > use, in my experience :) Yes, I'm well aware of it ;) Thanks! -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: marck@FreeBSD.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------
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