Date: Thu, 13 Sep 2018 10:50:15 -0700 From: Lee Brown <leeb@ratnaling.org> To: Josh Paetzel <josh@tcbug.org> Cc: freebsd-hardware@freebsd.org Subject: Re: Dell SAS6IR is it worth the effort to convert to IT Message-ID: <CAFPNf59R0ZJTORXJmu9uce53Tdnih_D4UACi5WYz1ziEhD=zzw@mail.gmail.com> In-Reply-To: <1536854606.4023246.1507062808.200A7C5B@webmail.messagingengine.com> References: <CAFPNf5_9jn2Hjksz_Cus=3Ms74Fw5D5fLJRDgcZ_P9c5uMR=Vw@mail.gmail.com> <1536854606.4023246.1507062808.200A7C5B@webmail.messagingengine.com>
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On Thu, Sep 13, 2018 at 9:03 AM, Josh Paetzel <josh@tcbug.org> wrote: > > > On Thu, Sep 13, 2018, at 10:58 AM, Lee Brown wrote: > > Hi, > > > > I'm in the process of setting up an old PowerEdge R410 which has, I > > believe, the LSI Logic AS1068, using the mpt driver. > > > > I'm not interested in running it as a hardware RAID but rather a > > geli(authentication only)+gmirror+gjournal. > > > > It seems like flashing it requires booting into dos, which frankly I > can't > > be bothered with. mptutil doesn't appear to have that capability. > > > > Are there any major downsides to running it in IR mode as two disks? > > There's no option to turn off the write-cache, but being battery backed > the > > only danger I see with that is if the machine is powered with pending > > writes on the card and the battery gives out before power is restored. > > > > The use case is routing/snort IPS with minimal logging, so disk > performance > > isn't critical. It will be the redundant router so mostly doing nothing > > except the little work OSPF needs. > > > > Thanks in advance for any comments -- lee > > _______________________________________________ > > freebsd-hardware@freebsd.org mailing list > > https://lists.freebsd.org/mailman/listinfo/freebsd-hardware > > To unsubscribe, send any mail to "freebsd-hardware-unsubscribe@ > freebsd.org" > > On those controllers IR mode is just IT mode with the ability to create > RAID. If you don't create a RAID array it behaves exactly like an IT > controller. > > And yes, FreeBSD mptutil doesn't have the ability to erase the flash, > which you need to be able to do to go from IR to IT. DOS is the typical > answer for that. > Thanks a lot Josh, most appreciated.
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