Date: Wed, 23 Sep 2015 08:55:53 -0700 From: Tim Gustafson <tjg@ucsc.edu> To: Michael Fuckner <michael@fuckner.net> Cc: freebsd-fs@freebsd.org Subject: Re: Switching from MFI to MRSAS Message-ID: <CAPyBAS6p_=Ld6yiis00L3GxCFgq7JwUXkvg=mzni3ZHHEC1Z3Q@mail.gmail.com> In-Reply-To: <56023C15.7080007@fuckner.net> References: <CAPyBAS4-oRjrybxu81nPO1Xb0WPdYzJRoEZ3t8zjNUrxFsiZpw@mail.gmail.com> <56023C15.7080007@fuckner.net>
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> Different driver for different LSI Chipsets That's not what the man page says. The man page says: "Older MegaRAID controllers are supported by mfi(4) and will not work with mrsas, but both the mfi(4) and mrsas drivers can detect and manage the LSI MegaRAID SAS 2208/2308/3008/3108 series of controllers." And goes on to say: "The device.hints(5) option is provided to tune the mrsas driver's behavior for LSI MegaRAID SAS 2208/2308/3008/3108 controllers. By default, the mfi(4) driver will detect these controllers. See the PRIORITY section to know more about driver priority for MR-Fusion devices. mrsas will provide a priority of (-30) (between BUS_PROBE_DEFAULT and BUS_PROBE_LOW_PRIORITY) at probe call for device id's 0x005B, 0x005D, and 0x005F so that mrsas does not take control of these devices without user intervention." The FreeBSD hardware support page specifically says that the "mrsas" driver will handle the Dell PERC H330 controller (which is what I have): https://www.freebsd.org/relnotes/CURRENT/hardware/support.html So that's what I'm asking about. I have a newer card, which according to the man page is supported by the mrsas driver. So my question is, if I "flip the switch" so that the mrsas driver takes over, will everything "just" work, or will I need to re-format my disks because the "mfi" driver configures the disks in a way that is somehow incompatible with the "mrsas" driver. -- Tim Gustafson tjg@ucsc.edu 831-459-5354 Baskin Engineering, Room 313A
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