Date: Mon, 22 Aug 2016 14:16:38 -0500 From: Linda Kateley <lkateley@kateley.com> To: freebsd-fs@freebsd.org Subject: Re: Recommended HBA for ZFS, contemporary Message-ID: <6f78c6ba-3118-8390-3956-64f573db4d54@kateley.com> In-Reply-To: <e9abbe16-837d-027a-6f0b-819944434143@mgm51.com> References: <alpine.BSF.2.00.1608221904270.82304@woozle.rinet.ru> <306ccab3-4c78-751a-2258-54701a64ab4b@internetx.com> <41DE4DAA-B5E1-4BB9-AF54-780236A901EF@gmail.com> <e9abbe16-837d-027a-6f0b-819944434143@mgm51.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Their cards can be run in 2 different modes. One that does raid on the cards, and the other just passes through the devices. That is IT mode. ZFS does better if you give it control of the device. By default it wants to do things like like send a cache flush request to the disks. If you have a controller card that doesn't understand the request, it can hang. Or you can turn off cache flushing. On 8/22/16 1:34 PM, Mike wrote: > On 8/22/2016 12:18 PM, Ben RUBSON wrote: >>> On 22 Aug 2016, at 18:14, InterNetX - Juergen Gotteswinter <juergen.gotteswinter@internetx.com> wrote: >>> >>> LSI SAS 2008 Based HBA, there are dozens of OEM available for Budget Prices >> With the IT firmware. > > What's the significance of "IT firmware"? > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?6f78c6ba-3118-8390-3956-64f573db4d54>